E85Forum.com

Arctic Fox · Joined: 05 Jun 2006 Posts: 3 Location: Vostok Lake

I'm looking to go cold turkey on gasoline and would just love to fill up the tank with E85. Does anyone see any possible problems if I do it just once... for research purposes. Wink

One tank full, and drive it till empty.

hotrod · Joined: 19 Apr 2005 Posts: 812 Location: Colorado

Might work but I would recommend you try a 30% -50% blend first to see how it copes. If you see no drivability problems with that you can edge up to the max that will give you good daily driving performance.

My 88 Subaru starts to get cranky at about 50% with no modifications and I saw about the same on the 2002 WRX so that is why I recommend you start in that range.

I'd run it down to about 1/4 tank and top off to 1/2 tank and see how it runs. If it is having problems you can simply top off the tank with another 1/4 tank of gasoline, to pull the concentration of E85 down to around 30%.

You planning on doing any modifications or simply find the limit you can run on the stock configuration?

If you stay in that area you will need to stay with lower concentrations for cold weather starting come winter.

Larry

Arctic Fox · Joined: 05 Jun 2006 Posts: 3 Location: Vostok Lake

Thanks for the suggestions!

I was hoping to leave the engine stock without doing any modifications, but I have read somewhere that I may have to adjust the timing if I run straight E85. I have no problems doing that if I can get it to run on just Ethanol. If I decide to run it and regular gasoline, I may have to think of some way to adjust timing; like with a switch, or some other idea. Smile

I'm thinking of going out this weekend and trying this out. Anyone want to cheer me on? (or stop me)

hotrod · Joined: 19 Apr 2005 Posts: 812 Location: Colorado

Actually the info I've seen is that E85 likes the same ignition timing as gasoline. I suspect you will need very little if any change in ignition timing.

That said the E85 may Allow more timing which depending on your car may or may not net you better performance fuel milage.

Larry

e85viper · Joined: 16 Jun 2006 Posts: 1

As others have said you can totally do this but I wouldn't recommend it. First off the fuel lines in cars running on gas aren't designed to handle e85 and neither is the pump. This probably won't be an issue early on but it will be if you do it over a longer period of time. As well e85 is high octane and burns cooler than gas so without changes in the timing and tuning of the engine you aren't getting much of the benefit of running e85

Karl Jacob
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