E85

[hugh]

Saw a question posted up in Jeepwire and thought it might be a valid one. The new E85 ethanol blend that I think is mostly etanaol is starting to show up and will our older motors run on it and is there something we might have to do to retrofit them?

[tufcj]

E10 and E20 (10% or 20% alcohol) ethanol blends will work OK in most gas engines. Older engines (pre 198?) that have rubber seals in the carbs may have a problem, since the ethanol will attack the rubber.

I wouldn't run E85 (85% alcohol) in anything but a modern fuel injected engine that is designed to run it. A carbed engine will need some jetting and timing changes, plus a check or change of the above mentioned seals. The high alcohol content will also have a detergent effect, and loosen any gum and varnish in the tank and lines, so be prepared for clogged filters and jets.

just my $.02

Bob
tufcj

[Goose]

If you pump a tankfull of E85 into an older carbed engine.. you will be walking home..you need to jet way up to run 85%ethanol..the "flex fuel" vehicles have the ability to compensate built into the computer.