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Fuel without Ethanol

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Old Jun 21, 2021 | 08:30 AM
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Default Fuel without Ethanol

Have located a source of fuel without ethanol close to my home . I would like to know your thoughts on using that fuel in my 1989 car . I do believe that when my car was new their was no ethanol added to gasoline so I would be going back to using ethanol free gas . Would there be any benefits or downside to doing so ? I would think this would be optimal for winter storage .
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Old Jun 21, 2021 | 08:33 AM
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Every engine will benefit from ethanol free fuel. Especially one thats over 25 years old.
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Old Jun 21, 2021 | 09:30 AM
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There are no downsides I can think of except maybe the price. I run it in my '86 since it isn't driven much.
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Old Jun 21, 2021 | 09:55 AM
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I have an app (free) on my iPhone called "pure gas" for when I travel. Seems there is more pure gas now than 3 years ago. Dan
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Old Jun 21, 2021 | 10:13 AM
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No downsides.

More power and better gas mileage are upsides.

Gas has more energy than ethanol.
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Old Jun 21, 2021 | 11:04 AM
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Thanks for the feedback . I just don't want to be the guy that switches to it and then has a problem with seals or other fuel system related components .Those of you that have used it , did you stick with it or go back and forth between it and ethanol blend ? Sorry for all the questions as I have become older and more paranoid . lol
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Old Jun 21, 2021 | 11:38 AM
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it is all I run in my 88 now, I actually get 0.5mpg better with it in that car.

If it were more available and not as expensive I'd be running it in every vehicle.
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Old Jun 21, 2021 | 12:34 PM
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Thought it was advised to never run ethanol in the older years, concerns about gaskets and what not, originally not designed for it. Also tuning would be off in the ECM. Works okay in 85-89?

I had an incident with my '87, I put ethanol in since I was a newb and She tanked right away, ran really bad. Barely made it the mile or so to the garage. Drained the tank and put in real gas, back to normal.

My brain is now trying to tell me I failed and put 87ish octane as well, instead of premium, but I'm not sure about that.

Last edited by kael; Jun 21, 2021 at 12:39 PM.
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Old Jun 21, 2021 | 02:40 PM
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Originally Posted by kael
Thought it was advised to never run ethanol in the older years, concerns about gaskets and what not, originally not designed for it. Also tuning would be off in the ECM. Works okay in 85-89?

I had an incident with my '87, I put ethanol in since I was a newb and She tanked right away, ran really bad. Barely made it the mile or so to the garage. Drained the tank and put in real gas, back to normal.

My brain is now trying to tell me I failed and put 87ish octane as well, instead of premium, but I'm not sure about that.
87 octane gas with ethanol should not stop your car from running. Something else going on like water in the gas. Dan
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Old Jun 21, 2021 | 04:29 PM
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Originally Posted by Whaleman
87 octane gas with ethanol should not stop your car from running. Something else going on like water in the gas. Dan
I thought the same thing. I run 87octane with ethanol all the time in my Vette. Don't even think ethanol free gas is available close to me.
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Old Jun 21, 2021 | 06:35 PM
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Originally Posted by kael
Thought it was advised to never run ethanol in the older years, concerns about gaskets and what not, originally not designed for it. Also tuning would be off in the ECM. Works okay in 85-89?

I had an incident with my '87, I put ethanol in since I was a newb and She tanked right away, ran really bad. Barely made it the mile or so to the garage. Drained the tank and put in real gas, back to normal.

My brain is now trying to tell me I failed and put 87ish octane as well, instead of premium, but I'm not sure about that.
Out of the thousands of early vettes who use ethanol 87 octain without any problem..............

Last edited by Cruisinfanatic; Jun 22, 2021 at 11:34 AM.
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Old Jun 21, 2021 | 11:14 PM
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The fuel system is designed for up.to 10% ethanol. In 2005 gasoline was reformulated and MTBE was eliminated replaced with ethanol . Prolonged use of over 15% may cause fuel system failures. IDK there's a benefit of "Pure Gas" over Top Tier.
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Old Jun 21, 2021 | 11:30 PM
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Originally Posted by DALE53
Have located a source of fuel without ethanol close to my home . I would like to know your thoughts on using that fuel in my 1989 car . I do believe that when my car was new their was no ethanol added to gasoline so I would be going back to using ethanol free gas . Would there be any benefits or downside to doing so ? I would think this would be optimal for winter storage .
Look at the injectors first. If they are Multecs, you are going to have issues since the injector coils are fuel cooled and ethanol doesn't play nice with the insulations. See picture below.


I would dump any car with Multecs I own simply because I don't want to be chained to that one gas station. If I had Bosch, screw the little bit of power loss or MPG. That I have to fill up at a certain station only will not fly with me. Not for a daily driver. I want to be able to fill up without having to drive to that one place.
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Old Jun 22, 2021 | 07:58 AM
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Originally Posted by Kevova
The fuel system is designed for up.to 10% ethanol. In 2005 gasoline was reformulated and MTBE was eliminated replaced with ethanol . Prolonged use of over 15% may cause fuel system failures. IDK there's a benefit of "Pure Gas" over Top Tier.
I was under the impression you could have top tier pure gas. Like BP non- ethanol 91 which is both. Dan
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Old Jun 22, 2021 | 09:12 AM
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Originally Posted by Kevova
The fuel system is designed for up.to 10% ethanol. In 2005 gasoline was reformulated and MTBE was eliminated replaced with ethanol . Prolonged use of over 15% may cause fuel system failures. IDK there's a benefit of "Pure Gas" over Top Tier.
AFAIK, pure gas is just that. No ethanol. Top Tier has more detergents. I use TT simply because it's there. I also use E10 because I don't want to have to search around or have to find a spot to fill up. Since I don't have Multecs, when I see the last bar on the gauge or lower, I fill up wherever I am at. I don't have to time it to whether I can make this trip work with the amount of gas I have left. The little bit of extra is cool but not enough to justify being tied to only those places that sell pure gas at 93 octane
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Old Jun 22, 2021 | 09:43 AM
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Originally Posted by aklim
AFAIK, pure gas is just that. No ethanol. Top Tier has more detergents. I use TT simply because it's there. I also use E10 because I don't want to have to search around or have to find a spot to fill up. Since I don't have Multecs, when I see the last bar on the gauge or lower, I fill up wherever I am at. I don't have to time it to whether I can make this trip work with the amount of gas I have left. The little bit of extra is cool but not enough to justify being tied to only those places that sell pure gas at 93 octane
In my area pure gas only get to 91. No 93 pure gas anywhere. Dan
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Old Jun 22, 2021 | 10:03 AM
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Originally Posted by Whaleman
In my area pure gas only get to 91. No 93 pure gas anywhere. Dan
Seen 91 mostly but more than 10 years ago, outside my house was a gas station with 93 and everything but that one was E10. It was NOT listed on the pure gas site. There are a few in WI that ARE listed with 93 and even someone carrying 100 octane
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Old Jun 22, 2021 | 11:26 AM
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Originally Posted by Kevova
The fuel system is designed for up.to 10% ethanol. In 2005 gasoline was reformulated and MTBE was eliminated replaced with ethanol . Prolonged use of over 15% may cause fuel system failures. IDK there's a benefit of "Pure Gas" over Top Tier.
I'm missing your point . I'm pretty certain ethanol was added around 2005 . So my 1989 model for it's first 16 years had to run on gasoline without ethanol since it was only added in 2005 . So , how could a car manufactured 16 years prior to ethanol be designed for up to 10 % ethanol ? I'm sure no GM engineer saw that one coming and was being pro active ,

Last edited by DALE53; Jun 22, 2021 at 11:28 AM.
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Old Jun 22, 2021 | 11:33 AM
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Originally Posted by DALE53
I'm missing your point . I'm pretty certain ethanol was added around 2005 . So my 1989 model for it's first 16 years had to run on gasoline without ethanol since it was only added in 2005 . So , how could a car manufactured 16 years prior to ethanol be designed for up to 10 % ethanol ? I'm sure no GM engineer saw that one coming and was being pro active ,
Ethanol has been available in gas since the 70's
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Old Jun 22, 2021 | 02:15 PM
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Originally Posted by Cruisinfanatic
Ethanol has been available in gas since the 70's
So your saying my 1989 was fueled with ethanol added fuel right from the get go ? I'm not trying to be combative , just trying to understand . It's just not something I ever paid attention to , the evolution of gasoline . lol
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