Ethanol

[JFP in PA]

Originally Posted by dbear61

+1 on all three points, except I think point 2 JFP means "retain". Gas and water don't mix, but alcohol and water do. So the Ethanol blended fuel can retain water and separate from the oil-based gas. But points 2 and 3 aren't a concern unless the same fuel is sitting in your system for several months. Normal driving and refueling every week or two will only give you problem #1.

The only gas within 50 miles of me is 10% Ethanol, all 3 grades: 87, 89 and 93. I only use 93. I get 18-19 mpg combined city/hwy driving and max out at about 24 on the highway. For the Winter, I add Stabil on the last fill-up and let it run for 15 minutes to work through the whole system.

DBear

No, I meant exactly what I said: entrain: transitive verb. 1 : to draw along with or after oneself. 2 : to draw in and transport within a fluid.

And items 2 & 3 also become problematic from repeated long term dynamic exposure (driving) as well as static exposure, (storage) as the excess available water creates acids from degrading the fuel additives, resulting in both corrosion and fuel degradation build up.

Fuels containing ethanol have a higher mositure content right out of the station pumps than non ethanol fuels, so the process is already underway before you even buy it.