Long term effect of using e85?

[Dinokill3.7]

Hey guys.

I have a 2017 Mustang GT that has been running e85 for about 3 years. Tuned by Lund.

Minimal mods; cat back exhaust, tires/wheels, lowering spring and e85.

Any long term effects?

Sometimes I cycle regular gas but it’s like 2 times a year.

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[NGOT8R]

Just try and keep an eye on your fuel pump. Mine burned out at 7K miles on the odometer with no advanced warning.

Some people think replacing them regularly (maybe once a year) is a good idea. They’re not that expensive, but when mine went, I spent $200 to get towed a very short distance (about 10-14 miles). That money spent on a tow could have bought me a fresh new pump.

 

[jpjr501]

First Issue: The white crusties. When E85 is old it turns into that old crunchy sock your Mom yelled at you about. The top of my fuel pump hats must have had seepage and ran into this. I wonder what else has this crust in my fuel system.

Second Issue: I also go back / forth from 93 to E85 so running my fuel level down to 15 miles to do this must suck (literally) for my triple pump setup. That's my biggest issue E85 issue, Ford doesn't offer flex fuel so it's either 93 or ethanol.

Third Issue: I live in a high humidity area so on E85 I have water dripping heavily from my mufflers. E85 absorbs a shit ton of moisture so it introduces water to areas you don't want it. My mufflers for sure will rust eventually.

 

[RNM]

If you run e85 on a daily basis, be sure to drive it enough to have the oil reach operating temperatures. E85 and short driving distances are a recipe for disaster.

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