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Old May 13, 2015 | 10:19 AM
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Default Ethanol

I have a 1978 L-82 and would like to know if ethanol is a threat to my engine. Thank you
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Old May 13, 2015 | 10:32 AM
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Originally Posted by rrkriete
I have a 1978 L-82 and would like to know if ethanol is a threat to my engine. Thank you
You'll hear lots of different opinions, here's mine. My 69 developed a leak in the gas tank because it had corroded from the inside. The Corvette Center in Colorado Springs did the gas tank replacement, and told me they were seeing a lot more of those types of problems and they attributed it to ethanol settling out from the gasoline phase, and as ethanol is hygroscopic, it absorbs moisture and contributes to corrosion. I think that ethanol in gasoline is damaging especially to cars that tend to sit for any period of time, to both the tank and the fuel system. I'll encourage you to not rely on anecdotal evidence only for your decision. Those of us who have a strong chemistry background tend to dislike ethanol/gasoline blends. It's become controversial, influenced by "environmentalists" and the corn industry. Whenever politics and big money are involved, it becomes hard to get to the truth.

The bottom line, ethanol settles out in the tank, the car runs lean and hot when the fuel pickup at the bottom of the tank pulls the ethanol rich mixture first.

Last edited by lurch59; May 13, 2015 at 12:28 PM. Reason: clarity
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Old May 13, 2015 | 11:29 AM
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We have several gas stations selling 93 octan ethanol free. I buy that when I know the car will not be driven like the 4 month winter storage.
I thinking is drive it or by ethanol free.
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Old May 13, 2015 | 12:16 PM
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Not sure for cars that sit over the winter, but for all my lawn equipment I just add a splash of Seafoam to the tank I have had no problems since....? How about maybe 1/4 can to each full tank.....? Would that take care of the issue....?

Brian
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Old May 13, 2015 | 12:34 PM
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Originally Posted by Wee
Not sure for cars that sit over the winter, but for all my lawn equipment I just add a splash of Seafoam to the tank I have had no problems since....? How about maybe 1/4 can to each full tank.....? Would that take care of the issue....?

Brian
We can get ethanol free regular in our area. I like Amsoils fuel additives because they publish their research data from independent labs. The issue is how to keep the fuel homogenous; I'm not saying Seafoam doesn't work, but I'm uncomfortable using anecdotal evidence only. I worry that ethanol cuts the oil on the cylinder wall, reducing lubrication. One of the reasons diesel engines last longer is that diesel fuel aids in cylinder wall lubrication, and I think ethanol works against you as far lubrication is concerned.
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Old May 13, 2015 | 02:25 PM
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Originally Posted by rrkriete
...I have a 1978 L-82 and would like to know if ethanol is a threat to my engine...
Might be a moot point if all you can get contains ethanol.
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Old May 13, 2015 | 02:54 PM
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Originally Posted by Easy Mike
Might be a moot point if all you can get contains ethanol.
Conversely, if ethanol-free is available, why worry about the possible situation with ethanol-blended fuels? Just buy the ethanol-free.
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Old May 13, 2015 | 03:22 PM
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Originally Posted by Easy Mike
Might be a moot point if all you can get contains ethanol.
Well, I think the additives are helpful in that they are supposed to keep the ethanol in suspension.
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Old May 13, 2015 | 03:25 PM
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Originally Posted by LeMans Pete
Conversely, if ethanol-free is available, why worry about the possible situation with ethanol-blended fuels? Just buy the ethanol-free.
The only reason would be that the ethanol blend is cheaper. I usually just spend the extra money on ethanol free, but don't worry too much about it if I'm going to burn it in a week or two especially in the summer.
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Old May 13, 2015 | 03:40 PM
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I'm waiting for you-know-who to chirp in about how there is nothing wrong with ethanol in YOUR classic car fuel system. Hopefully so much oil is now being fracked out of the ground that all these government-subsidized corn juice plants will be forced to shut down. I seriously doubt that ethanol is cheaper to produce than gasoline. Any bets on a government bailout for the millionaire corn farmer/energy sultans?
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Old May 13, 2015 | 04:01 PM
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Originally Posted by Faster Rat

I'm waiting for you-know-who to chirp in about how there is nothing wrong with ethanol in YOUR classic car fuel system. Hopefully so much oil is now being fracked out of the ground that all these government-subsidized corn juice plants will be forced to shut down. I seriously doubt that ethanol is cheaper to produce than gasoline. Any bets on a government bailout for the millionaire corn farmer/energy sultans?
I was wondering the same thing. So far very quiet and peaceful. And yes, the government sponsored corn juice plants need to go away.
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Old May 13, 2015 | 04:05 PM
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The fuel shouldn't hurt your engine. Treating your fuel when the car sits for some time is a very good idea.
Wouldn't it be nice to have leaded gasoline back in the tank. Heard the classics loved to drink it up.
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Old May 13, 2015 | 04:14 PM
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Originally Posted by Faster Rat

I'm waiting for you-know-who to chirp in about how there is nothing wrong with ethanol in YOUR classic car fuel system. Hopefully so much oil is now being fracked out of the ground that all these government-subsidized corn juice plants will be forced to shut down. I seriously doubt that ethanol is cheaper to produce than gasoline. Any bets on a government bailout for the millionaire corn farmer/energy sultans?
It actually takes 1 unit of energy input (electricity) to yield 1.3 units of Ethanol Energy (corn based). Sugarcane derived ethanol (the way it is done in Brazil)l is closer to 1 to 8. This is a triumph of ADM (Arthur Daniel Midlands) lobbying that this debacle continues. It is driving up food costs too. We subsidize (with our tax $$) production of a fuel, corn based ethanol, that only has a 1 to 1.3 yield, that give us lower gas mileage and performance (lower BTU density than Gasoline), and this has driven the price of corn up, hence beef and other products have risen as well. If Ethanol was so great and economical it would not require subsidy and would sell on it's own accord. That is free market.
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Old May 13, 2015 | 04:24 PM
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Originally Posted by 69Pman
The fuel shouldn't hurt your engine. Treating your fuel when the car sits for some time is a very good idea.
Wouldn't it be nice to have leaded gasoline back in the tank. Heard the classics loved to drink it up.
Ethanol left sitting in the carb bowl of any engine will cause corrosion. I have seen carbs turn to powder.

My car has been sitting in storage off and on for the last 3 years. I only put non-ethanol REC 90 (south Florida marine gas) mixed with VP Racing Fuel's C12 (108 octane leaded) in my tank. Mixed at 3:1, I figure the octane rating is around 94-95. That works just fine with my supposed 10.25:1 CR and 38 degrees total timing. After sitting for six months, the car started on the first crank. Love the smell of the exhaust.
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Old May 13, 2015 | 04:30 PM
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I can highly recommend "Black Gold Stranglehold" by Jerome Corsi. It's very enlightening, and several studies have been able to confirm that it is possible to make short chain hydrocarbons from conditions found at the earth's mantle, from inorganic elements.

Last edited by lurch59; May 13, 2015 at 04:33 PM. Reason: incomplete
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Old May 13, 2015 | 04:33 PM
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The idea that there are enough photons striking the Earths surface for plants to compete assembling hydrocarbons for fuel vs drilling for it is ludicrous when you do the math.
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