Joined: Apr 17, 2005 Posts: 891 Location: New Hampshire
Posted: Wed Feb 02, 2011 4:28 pm Post subject:
It wont damage the motor but it can cause problems with the fuel system. I was having a problem with a sticking need jet, I know put marvel mystery oil in my fuel tank, a little with each fill up and I have not had a problem since.
The ethanol leaves unwanted deposits throughout the fuel system and many places in the engine. More modern cars won't suffer with the deposits so much because they manage the fuel air ratio better and run 40 or more degrees hotter. The ethanol also is unfriendly to older type rubber products and the real bottom line is the ethanol reduces the thermal efficiency of the gas causing us to actually burn more gas to get the same power.
I run a mix of the nasty new ethanol and good old fashion Aviation Gas which has plenty of lead in it. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Joined: Jun 14, 2005 Posts: 25 Location: São Paulo - Brazil
Posted: Fri Feb 04, 2011 6:45 pm Post subject:
Here in Brazil, all kind of fuel have 25% ethanol (including high octane premium fuel). It's a problem, since old jeep fuel system are not ready for it.
Some rusty can grow on the top of fuel tank, but major problem are related on fuel pump and carb diaphragm. This rubber parts just melt with this gasoline-ethanol cocktail.
Some timing adjustments could be necessary (engines ready to ethanol have the timing a little advanced)
I use 1:60 2 stroke maritime oil to try to protect internal metal and rubber parts.
Wes, about load fuel, I read something in a Porsche forum talking that lead also act as a solid lubricant on fuel. So in the past, old lead loaded fuel also lubricated the valves.
Joined: Dec 02, 2006 Posts: 115 Location: Bloomfield, New Jersey
Posted: Fri Feb 04, 2011 9:08 pm Post subject:
Gentlemen: A fellow jeep owner/friend of mine told me that Marvel Mistery oil is the same thing as Sta-Bil. Its supposed to be good in the gas and the motor oil. He also told me that it was used in airplane engines during WWII. What do you think Wes? Is he right? Regards to everybody.
Marvel Mystery, peddler's wonder drug elixars and any of the other old folks tales will be with us forever. Those folks offer all the jazzed up old tales but can not give one ounce of supported scientific fact to support their claims.
I can tell you this factual account. I bought a new 1995 Ford F150 300 six 5 speed pickup. I drove it 320,000 miles using regular Valvoline 5 or 10 W30 oil and added no additives, replaced no sparkplugs, and changed one starter. It never burned oil. The engine gave up the ghost when the crank thrust bearing wore to the point that under a heavy load I would get a serious drop in oil pressure.
Here's another fact. I used Ford type F trans fluid for most of the purposes those folks claim they used Marvel Mystery Oil for until it became very hard to find the Ford Type F fluid. I use Marvel Mystery Oil to lube my air tools and add it to the gas occasionally as a top oil which is what I also used the Ford Type F for. I would suggest the next time you shop the oil counter pickup a bottle of the Marvel Mystery Oil and a quart of Ford type F fluid and pour a little of each in two saucers. Smell, taste if you want and fell the texture of both between your fingers. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
I posted a reply in the "Avgas" thread for this,and will add it here; I use a product called "Star Tron", specifically designed to combat the harmful effects of ethanol.It was developed for Marine engines,& is now widely used in all engines. It prevents phase separation (water) and the corrosive action of the ethanol. Marinas, motorcycle shops,equipment dealers sell it. Look it up at "Star Tron.com" It really is a "Must Have" for these old vehicles....
Ethanol is a problem for pre 1970 engines but it is a manageable problem. I don't feel the extremes such as electric fuel pumps and emptying carbs between uses are necessary. In fact from a corrosion standpoint most testing facilities report the corrosion becomes an issue when the parts are exposed to air. This means empty of fuel. I feel marketed elixars are at most questionable. My answer for the last 20 years has been add back a quantity of lead in higher octane gas (100LL Avgas) to reduce the harmful concentration levels of the oxygenates such as ethanol. Using modern seal and diaphragm materials is essential. Draining and exposing components to air is only safe to do if you then immediately coat the components with a preservative such as 10 weight oil. This is especially true in steel fuel tanks which you will notice are usually corroded through the upper portions first because we do not keep the tanks full all the time to keep air from them.
So my advice when making any important choice in life is to get the THE WHOLE STORY disect and understand what you read then make your best choice.
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Gentlemen: A fellow jeep owner/friend of mine told me that Marvel Mistery oil is the same thing as Sta-Bil. Its supposed to be good in the gas and the motor oil. He also told me that it was used in airplane engines during WWII. What do you think Wes? Is he right? Regards to everybody.
