This is generally regarded as good stuff, and a lot of people are using it. I presume this was about the most de-tuned version of the 327 (just my guess). I have a rock on my desk that protects me from tiger attack, I haven't been attacked by a tiger, therefore it works! Marvel mystery oil lubricates the entire fuel system-fuel pumps, fuel injectors or carburetors and the top portion of the cylinders. The "Turbo-Fire" 327, by comparison, had a 10.5:1 compression ratio. I installed new pistons (and liners) and had that one seat cut and lapped in the valve. It had 69,000 when I got it, about 88,000 now. All your true octane booster that do any thing are toxic , highly toxic , which why they took them out of gasoline and will not sell you any . You know, MMO smells just like scarlet balsam, which is an old timey wound treatment for horses. Welcome to America, 2019, where everything is true and not true at the same time depending on what you already want to believe. I do know it will help when lifters start to be lazy and Discussion in 'Old's Cool' started by lucky6600, Dec 1, 2010. For a 400 Pontiac I like the 6X heads - hardened seats and more manifold bolts. Sign up for a new account in our community. And it was back to working again, just like that. there were 55-gallon barrels labeled MMO (Marvel Mystery Oil). The biggest problem with E-10 crap fuel is the hydroscopic action of the alcohol. Some state that this additive can help reduce the chattering noise by 90%.Another user said that he added some MMO to the crankcase of his Avalanche 2002 a while back. Last edited: Mar 24, 2011 My wife said no FJ! However, the carrier is toluene, and Well, I've been using MMO for many years now, along with Rislone. I don't see any pickle. 1 1993_VG30E_GXE Joined Apr 4, 2009 Messages 355 Location Ontario, Canada Dec 12, 2009 #1 Does anyone know of a substitute or name a few, as MMO is discontinued now in Canada. The pump hushed and is still in there2 monthslater. whether because of transportation problems (alcohol absorbs water) or Then some guy tells him that 2-stroke oil like he uses in his chainsaws would be just as good or better -- and maybe cheaper too. There is a bromide chemical in 100LL that is supposed to keep the Marvel Mystery oil and Seafoam are equally excellent products. Born in Chicago in 1923, Marvel Mystery Oil was developed to combat deposits on carburetors caused by poorly refined gasoline of the age. As I understand the Then I had a piston failure and there was some damage to a valve seat as a bit of piston ring marked it. All content of this site Copyright 2018 TheAMCForum unless otherwise noted, all rights reserved. It's all BS but it worked, and the unleaded was phased in over a period of years. instructors at least filled up with straight 100LL. Several old mechanics from the 1950's told me it was early auto transmission fluid with about 25% kerosene. Marvel Mystery Oil keeps that oil layer strong, preventing the water from eating through the film as it strengthens it to survive even the coldest of temperatures. Of course, when unleaded fuel came out, there was no But how does it work? Won't hurt but you don't need it. Furthermore, the product is budget-friendly and can be used on a variety of vehicles. Drive it as it is, put regular gas in it and stop worrying. The automotive gasoline option. When you mix this additive into your fuel, it helps to reduce carbon emissions. Inquiring minds want to It was at this time the government (EPA) started talks about banning it, that actually happened in 1996 although living in Los Angeles county leaded fuel was essentially gone by 1980. Interesting discussion, back in the 30's salesmen would dip there ties in tetraethyl and wave over a knocking engine which would clear up. As a result, your car will have to work harder to generate enough power to crank the engine. Then there is ALCOR TCP. Period. This MMO received a lot of good comments from users. the fifth one says let me check and I will get back with you. The '30 Packard and '15 Hudson don't get pushed as hard as the others, but are typically treated to additives, as well - maybe a waste of time and $$, but I feel better about it. Reply to this topic . I don't think I've seen so many responses so quickly to a post before. This can help him share his expertise and experience with others and learn more from them. I have never had issues with even square port heads with valve recession and I rag the heck out of my cars and used to cruise around the desert at 120 M.P.H. 2/ Will Marvel Mystery Oil Reduce Oil Consumption? Are available for most engines now and should be considered whenever a head come off. -- Daniel Ford, by Robert Parker (Piper Cub Builders List). I think the can looks neat. That would most likely cause catastrophic engine failure. 5 Reasons Why You Should Use Marvel Mystery Oil, Whats Customers Say About Marvel Mystery Oil. story, there's no alcohol in the fuel when it comes ashore at Portland, Yeah, anything can fail, but there is no way I would take that engine apart because of the valve seats. Powered by Invision Community, Lead additive in low-mile, original SBC engine from 1966, TEL is a fuel additive, first being mixed with gasoline, in the 1920s ( NOT 1950's) as a patented octane rating. This one from the brand is a special one. - It makes a beautiful molecule - the famous "benzene ring". AMC engines never really have issues with valve recession as they used good materials in their heads. them my engine had quit and would they please send someone out to give me It's amazing how tertra ethyl lead was used to reduce emmissions way back at the turn of the century? As far as the valves, MMO helps remove/prevent carbon build up on the valves. So if you run a multi viscosity oil such and 15w-50 you are changing the properties of the oil, and potentially reducing the oils effectiveness. All of these combined functions result in a high-performance and long-lasting engine. So after a year or two, the STCs Low HP cars are doing these grades in low gears barely making 40MPH. The chlorinated benzenes helped to scavenge this and turn into the volatile lead chloride. It's probably similar to an ashless oil (think 2-cycle oil). This also will help your vehicle easily start from sub-zero temperatures. needed to go around again. were taken off, the mogas tank was topped off with 100LL, and the (100LL at 2.00 ml TEL) and you have the same 0.50 ml TEL that 80/87 I have had issues with a lot of chevies after a valve job took the crappy induction hardenning away. Tricresyl phosphate, an antiwear and extreme pressure additive in lubricants 0.1-1.0%[2] lubricant, so when it vaporizes during combustion, oil droplets are When Marvel Mystery oil is applied, it can dramatically slow down this process. install one-half pint MMO. Re: Marvel Mystery Oil and E10 in our small engines. YMMV.foot note; I ran other cleaners on occasion but still developed a dirty injector. The original oil enhancer AND fuel treatment cleans the engine from the inside out, increases fuel economy, and protects against temperature extremes. or intake manifold. Marvel Mystery Oil(R) boasting an enviable reputation among vehicle owners worldwide, is truly a legend of its own. Use additives if you want, it won't hurt the engine. Not those other engines that were not really for the sans coulottes often had unusual ratings. The kerosene was what made it effective with the first hydraulic valve lifters . Petersen's STC allows for mixing of av-gas and mo-gas. Both are high in detergents was, the airport is apparently willing to live with it. OTOH many years ago racers agreed that STP might save the engine if starved for a few seconds under high load. ", "Long life exhaust valves. There is not really any difference in the seat area. Cleaning firearms with Marvel Mystery Oil? I don't think they would sell them, either, if there was enough heat and compression in the crankcase to ignite the fluid. DO NOT use it in vehicles equipped with catalytic converters. further need for TCP. 3/ When Should You Use Marvel Mystery Oil? Burns Hotter of course, so what Plum says is true for both Marvel, or crankcase oil getting burned in a wore-out cylinder. Petroleum Distillates (Stoddard Solvent) also known as white spirit, 10-30%[2] (Pack of 2) 1,388 $1776 $19.40 FREE delivery on $25 shipped by Amazon. and a lot of people are using it. Perhaps there is no consensus on this topic. MY 86 CJ-7 NEEDED THE HEAD GASKET REPLACED. The advantages of this additive are described in full below: This is an absolute must-have product if you wish to keep the internal components of your engine clean. So, by doing it before the seats fail, you are just doing something ahead of time that might never need to be done, and might cause a failure in the meantime. Marvel tells you on the can how many ounces of mystery oil per gallon (s) of gas. Definitely not a Corvette motor. Your email address will not be published. This is generally regarded as good stuff, Which brings up an interesting topic: yes most mass production engines under about 10:1 compression and 4" bore (see "flame propagation rates") are reasonably safe under light duty on 93 PON. EXCLUSIVE: Why this pro-gun Colorado Democrat thinks he can beat Lauren Boebert in a rematch: Businessman Adam Frisch criticizes his own party for abandoning him and rural Americans - and says . (And no, You are actually in error on many of your assumptions. Marvel Mystery Oil is top end lubricant , not an octane booster. and on the spark plug. Marvel mystery oil,the idea behind it was and still is,it is basically a cleaner,it removes sludge from lifters and helps to soften the carbon built up between the rings.We used to use a quart of. I can think that this light oil will help the rings remain free, and lessen carbon build up in the grooves where the piston rings are located. RVP has nothing to do with octane and is almost always lower in modern gasoline than it was in the old days. Carburetor1; Feb 14, 2022; OTC and Third Party Oil . up to a higher RPM for a few seconds and then recheck gives a Gunk lead substitute, yes or no? Also if it did help protect the valves, how would you know? Sorry for beating a dead horse, guys. Our gas here is 10% ethanol. Ninety-five percent of customers gave it a four-star rating or above.This MMO received a lot of good comments from users. Modern gas has lot more aromatic daisy chain hydrocarbons in it and a higher Reed vapor pressure. So, "How do it woik?" and with the wind whistling through the gaps between the windows and the The popular theory is that the MM oil acts as a vapor blast and keeps carbon and lead deposits soft and passing through the exhaust valve rather than adhering to the valve, seat, or guide. With an original, un-modified small block chevy engine like mine (with original heads) should I be worried about running lead additive/substitute? Every time I have ever broken into or had work done on one of my engines, they have been clean and free of sludge. This engine still wears it's factory paint and decals so I'm assuming that it has never been apart. Thats why besides being a mechanic and technician, he started his writing for an auto blog. that our friendly 80 octane had. Let's end this nonsense before the cloudy waters become opaque, eh? Even when using more MMO breaking in a fresh rebuild and adding a quart of motor oil to a 20 gallon tank, it's tough to see much smoke in the exhaust. Remember too, He hasnt had to replace the crappy fuel pump yet, even after 300k miles. When the fuel in the tractor is about a month old, I drain and filter it then throw that into my '71 Chevy van. Like several other similar products that date back several decades Marvel Mystery Oil seems to be a legitimate detergent additive that will reduce varnish and gumming in an engine. I NO LONGER OWN IT BUT THE NEW OWNER NOW HAS 145K ON IT AND IT IS STRONG AND QUIET, Do Not Sell or Share My Personal Information. It can be used as a fuel additive by mixing it with the gasoline in your tank. that lead is added to aviation fuel to boost octane rating, and with the http://www.marvelmysteryoil.com/index.php/site/mmo/ 7 Konsili Lengkap Kanon - Free ebook download as PDF File (.pdf), Text File (.txt) or read book online for free. Posted March 3, 2018. Page 1 of 3 1 2 3 Next > lucky6600, Dec 1, 2010 #1. lucky6600 Long timer. in crank case a week or two before oil change. Didn't even have cloudy gasoline in the carb. -- Dan Ford That Marvel-ous Mystery Oil Or any? I DRIVE my 1954 and 1941 Cadillacs, sometimes cross-country, and at modern Interstate Highway speeds (so as not to get run over by 18-wheelers and Soccer Moms reading their iPads). either place it will be removed at oil change. As far as the induction hardenning, Where is that info from? This makes sludge and corrosion accumulate and causes damage. Ortho Dichlorobenzene, a softening and removing agent for carbon-based contamination on metal surfaces, 0.1-1.0%[2] If used properly, there are no harmful side effects of using Marvel Mystery oil at every fill-up. formula was purchased by ALCOR. Your donations help keep this valuable resource free and growing. For instance, if your engine requires 5 quarts of engine oil, use 4 quarts of oil and 1 quart of Mystery Oil. Robert Parker uses Marvel Mystery Oil to reduce the buildup of lead from 100LL. The pickup is driven sparingly, just a few hundred miles per year, if that. 100LL fuel still contains 4 times the lead '68Jav, and '90 Gold Rush trailer. I was more referring to the "sky is falling" warnings that were circulating when "leaded" fuel (not much lead left by then) finally disappeared. I have wondered what adding MMO does to your 5w-20 as well. Marvel Mystery Oil can be used to keep the fuel system clean. MMO is basicly automotive ATF. But, it will reduce friction making your engine easier to start and run smoother and may even pick up a little extra gas mileage. Lead was added to gasoline to deposit a metallic cushion and lubricating film on exhaust valves way back in the early days of auto and aviation engines. During your next oil change, substitute 20 percent of your engine oil with Marvel Mystery oil. ", "Hydraulic valve lifters, both inlet and exhaust.". But adding it to an engine with no issues offers no benefit and can actually create issues as it reacts with the materials some gaskets are made of. Regular use can improve fuel economy. I wonder if that's not the "secret ingredient" in MMO. It doesn't have lead, and I'd suppose it is not legal to add lead as it is an environmental toxin. Moving on ten or fifteen years, we were using 'lead replacement petrol', which had varying degrees of usefulness I'm told. At your next oil change, replace 20% of your engine oil (traditional or synthetic) with Marvel Mystery Oil or Marvel Ultimate Oil. A mechanic I know says to put a little of this in. You don't spill this stuff on your Not to be confused with the Benzites, eh, Ms. Edmonds? At the temperatures found in the combustion chamber of a cylinder, MM oil will be vaporized. Don't listen to them. yeah mmo oil and diesel kleen is supposed ot be the ticket to better mpg and well i ran the combo in my last tank i didn't measure just splashed it in and dumped a hole thing of diesel kleen in the gray bottle and my milage went from 15.5 to 18+ don't belive me fine don't. i will run w/o it and w/ it a few times to get a better feel as well as measureing it out to see but all i know is im . Besides, water may condense inside the cylinders and crankcase in cold temperatures, gradually eroding the protective oil film. Genesis 1:1-5, 26-31 I Corinthians 8:1-6 John 1; 8; 14 Colossians 1; 2 Don't worry about it! The rest is history. There In very short order this one seat dramatically ate itself away. By TheTurtle March 3, 2018 in Vintage Mooneys (pre-J models) Share More sharing options. Marvel Mystery oil is one of the most widely used fuel and oil additives today. Tough high alloy gives extra durability. So it seems that the residual lead on the seats from beforehand had continued to provide protection, but once cleaned off by cutting the seats valve seat recession commenced. Not sure if still available but have a few years supply. Many are getting 400k out of these truck easily. What about the ones that haven't? Many users also stated that they would order this product again as it helps improve the fuel economy. Lead (TEL) was a necessity. Air cooled VW's loved MMO for long road trips! Copyright 2023, Antique Automobile Club of America. There were re-portly 7 different cylinder head redesigns in 1973 and 1974 until all the problem were solved in the 1975 and up V-8 heads in particular, these are generally the 502 heads, a little bigger port, a little bigger valves, and supposedly induction hardened valve seats. Lead was an octane booster. cold weather (and New Hampshire can get really cold), they often stalled. While dibromoethane was added to leaded gas to do the same, some lead oxide did stay in the engine. This oil keeps rubber parts such as hoses, seals, gaskets, and wire well lubricated and prevents them from drying out. MMO What does marvel mystery oil do? So in the end, Marvel Mystery oil isn't a gimmick. One customer said, I added MMO to my 12 Ram 2500 diesel tank. engine parts. These are all question. But the Marvel Mystery Oil helps prevent this from happening. Newsletter? The oil will soften the carbon buildup in the heads and on the stem side of the valves. I use Shaler Rislone oil treatment, which is green and therefore politically correct. I almost forgot: TEL is a fuel additive, first being mixed with gasoline beginning in the 1920s ( NOT 1950's) as a patented octane rating booster that allowed engine compression to be raised substantially. Use one pint Marvel Mystery Oil about 5 hours before oil change. It was used to scavenge trace and unburned particles out of the fuel after combustion. I'm skeptical of anything that claims to perform equally well in the crankcase *or* gastank. the carburetor as a droplet, broken up WHEN I DID THIS I ALSO CLEANED OUT THE PUSH RODS AND POURED MMO IN THEM. decide". All the other valves and seats were untouched. Also the single quad L88 at 430 hp and the pundits top tripower at 435. Discover The problem turned out to be one of those new condensers. Obviously, I don't want to remove the heads if at all possible to retain the original paint. load up with straight mogas before it was adulterated for highway use. Engine. that is the real testament .. At the instant of It soaks into the carbon and eventually The local airport guy said that the AVGAS has so little (ie NO oil base) and Low Lead (thus 'LL' that many people all Marvel Mystery additive (lead substitute found at every auto parts store) to lubricate the system. on a high time engine; about half TBO or less should be the Everyone was gonna need hardened seats installed in their heads, or need to use smog-era heads with the induction hardened seats, etc. OTH if snake oil makes you happy use it. Moreover, this additive has the ability to dissolve and remove fuel residues from fuel injectors and carburetors. Each exhaust valve required adjusting after that time, about 0.015" on every single one of them. My experience with MMO.2007 Duramax diesel developed a knock that sounded almost as loud as a wrist pin going bad. However, nowhere on their website, nor in any information I have seen, is the claim that it can replace lead substitutes. 72 octane is the highest grade of gasoline that can be Marvel Mystery Oil MM12R - 16 Fl Oz. Marvel oil is used in the gasoline of inboard and I/O engines as an upper cylinder lubricant, and to lubricate fuel system components,( especially the fuel injectors). And the mogas smelled! Seafoam charges almost double the price of Marvel Mystery. This gives the oil time to work its way through the buildup around the spark plug. The verdict on Marvel Mystery Oil is that its a great product with many benefits. related: Seafoam vs BG 44K: Head-to-Head Comparison. Robert Parker used Marvel Mystery Oil to reduce the buildup of lead Its formula contains an oil-thinning ability that solves this problem. Every 100 hours use a good top engine cleaner such as A/C Delco X-66 in an aerosol and follow directions. the engine passages and crevices and hydraulic lifters, and stores it padgett, this is a stock "hi-torque" 327 truck engine. I'm not sure there are any Lead additives anymore, anyway it is illegal to use leaded fuel on any vehicle driven on a public road, street, HWY, Motorway, or FWY. They claim that the engines run VERY SMOOTH. bromide has to be at a certain temperature to work correctly. Use non-ethanol if it is available. to use Marvel Mystery Oil. THIS ELIMINATED THE VALVE TAP THAT HAD EXISTED PRIOR TO THIS WORK. Most gas has about 10 to 15% these days.E-85 has as much as 85 % ethanol, but out west here it's more like e-40 or 50 . With no alcohol in the system, the gasoline stayed fresh through the It's confusing. Oil Enema.". Share Followers 0. Thanks. A mechanic saw me doing that, picked up his jaw, and told me to use MMO in the oil. Then, in the new oil, methanol - a "drying agent", I use alcohols to clean the greases, dirts, oils, such off machines used around fabric as they clean well, leave no real residue, remove all traces of oil or grease and don't transfer anything to the fabrics. That's probably more than you wanted to know about benzene - and I don't know why I remembered it. Wether you use it right before a change, to replace a quart of oil, or just use it in the fuel tank is a matter of preference and I'm sure wont' hurt a thing used any of these ways. Now you know how it works, I will neither recommend or not Can MMO be used as a lead substitute? Circling back tothe original question "low-mile, original SBC engine from 1966". #64741-49-9, or may substitute "Stoddard Solvent", CAS #8052-41-3, or. I use Mobil which is considered a "Top Tier" gasoline: https://www.consumerreports.org/car-maintenance/study-shows-top-tier-gasoline-worth-extra-price/. I know this has been talked about before but I didn't see any information specifically about original, un-modified engines-- ones that haven't had hardened valve seats put in like mine. I wouldn't call Marvel Mystery oil a "lead additive." Main Menu. creates great clouds of smoke, and extends engine a life for a few more I just knew I had thrown a rod! Deutsch; English; Franais; Portugus gasoline ignites, it is vaporized and soaks into the carbon buildup Marvel Mystery Oil has been around for a long time and is used by many people. Don't think adding a top oil in the right ratio can do anything to hurt an engine/fuel system. Are cars nowadays wanting for top cyl lubrication with unleaded gas? It was a big problem! He demonstrated by dipping his finger in it and in 5 seconds it had evaporated and left his fingerprint white. Never saw that before but was RPO ZL1. It was soon discovered that it resisted detonation also and was intsrumental in the developement of more powerefull aviation engines during WW1. I do the same for the '65 Corvair, '37 Buick Roadmaster, and '88 Corvette. You fouling syndrome. Bob's article is followed by an email I received from Terry Lutz, expanding on Marvel and the alternative TCP. However, Kano Kroil Oil performs faster than PB Blaster by providing better lubrication. Dan Ford, Other websites: I hear a lot of disagreement about the need to run lead-substitute or lead additive in older engines. The customer rating for Marvel Mystery Oil (MMO) is 4.7 out of 5 stars. More than once I had to get on my handheld radio and call the shack to tell As for using a lead substitute, I don't know how anything that wasn't actually lead could be expected to have the same properties. Many believe that when used correctly, it can do good things in your cars. Unlikely that you'll see any notable damage to your pickup's engine using straight unleaded gas. I had a lot of trouble with my snow blower this year. Best Seller K&N Performance+ Octane Booster: Boosts Octane and Improves Engine Performance, 16 Ounce Bottle Treats up to 18 Gallons, 99-2020 29,253 $999 Save more with Subscribe & Save To mix with fuel, you put six ounces of additive for every 15 gallons of fuel. tank of fuel. Motorcraft Coolant Equivalent: [Orange & Premium Gold], 1987 2022 Jeep Wrangler Oil Type And Oil Capacity Guide. I use MMO to store my model airplane engines. Sale. Tricresyl phosphate, an antiwear and extreme pressure additive in lubricants 0.1-1.0%[2], According to the company's 2015 safety data sheet Marvel Mystery Oil is composed of:[2], Petroleum Distillates (Hydrotreated Heavy Naphthenic) also known as mineral oil, 60-100%[2] The main thing is:Drive your truck and enjoy it. venerable taildraggers. Please provide proof so we can switch to the perfected heads. https://www.consumerreports.org/car-maintenance/study-shows-top-tier-gasoline-worth-extra-price/. The extra few bucks may not really be necessary, but is not hurting anything and to my mind is worth theprecaution. 3 And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory. Marvels popularity soared as word spread of its effectiveness in treating all types of . Some people say its great because it helps clean your engine and keep everything running smoothly. When valves are beginning to stick, it will All your true octane booster that do any thing are toxic , highly toxic , which why they took them out of gasoline and will not sell you any that does much good. I would also change to synthetic motor oil although, I would like to hear some experienced opinions on this. There are a lot of debates about Marvel Mystery Oil is it good for your car or not? I believe 2 cycle oil may be more prone to fouling because it is meant to be burned. The leading theory is to use Marvel Mystery Oil. Sometime they do, and other times that's the last you hear.) in olden times (say, before unleaded fuel. This is in the 72 Wag (360). to be raised substantially. It will double the life of rings and valves. Hampton Airfield 7B3 is located on the New Hampshire seacoast, was also left to ponder what would have happened if I had overshot and Just like the topic of using non-detergent oil. A petroleum distillate (hydrotreated heavy naphthenic) is included, as is a petroleum distillate (Stoddard solvent). Drive with unleaded and be happy. The 'lead replacement petrol' wasn't doing any good at all. We took our time to make a list of the most promising marvel mystery additives, and here's what we have got. It comes in different packages but you can buy a single bottle for less than $4. With Marvel Mystery oil, you dont have to worry about your oil thickening at low temperatures. Just finished my third overhaul, this time I had to replace the guides for the first time and fix 15 cracks in the block. Do people who put a bit of Marvel Mystery Oil in their gas find that it makes the vehicle smoke much? You could probably get similar results using soapy water, though rust would be a concern. Yes, lead lubricates the upper cylinder head, but just because you use unleaded fuel doesn't necessarily mean your car lacks lubrication. Hi Jim, You can use regular 2 cycle engine oil or even any light weight motor oil. Therefore, it helps reduce friction of moving parts and cools the engine. I think perhaps time to add some to this computer.. Matt is worried about ruining the Wag's engine - I told him to just run gas in it. The only drawback I know of to using synthetic in older engines, is that it can make oil leaks worse. Well, Kano Kroil Penetrating Oil is a fine substitute to use instead of PB Blaster. was going to eliminate lead completely. off season, so there was never any problem with the carb gumming up. But I had to drive 1500kms with a trailer before the tin canister would arrive. We are putting 89 octane in, and adding a can of lead substitute every tank right now. Then, wait for an hour or longer before attempting to remove it. No matter how many times it's beat over the head, it keeps coming back to life . An 11-year-old girl in Detroit had to get staples in her head after . He explained why in a post on the Cub Builders mailing list, Anyone want to suggest that's a bad idea? Sitting around is no good for old cars or the fuel in them. you might want to try some ZDDP ( zink) the new oils don't have enough zi nk for the old motors..search it on goggle for more info. This improves your gas mileage by increasing the . MARVEL Mystery Oil. for every 10 gallons of gasoline. There was some discussion in those days about guides, but it wasn't the main thing. Then I can tell you it definitely improves the fuel economy. Some will make it to the screen, but