So here in MKE, they make us put 10% ethanol in our gas.. It does make it easier to pass emissions, but it wreaks havoc on my ecu tuning when I get gas without the ethanol... Now in Minneapolis and Chicago, they have this new cheaper gas called e85, it is 85% ethanol and 15% gas... I wonder if this is the ticket to getting FD's to pass the smog check... or if you will destroy your engine with the hotter combustion temps.... Any thoughts...


X

 

Not really sure about the higher combustion temps; I was under the assumption that ethanol (like methanol and other high-end petroleum distillates) actually burns cooler than regular gas. I do know that you will have to richen up your fuel mixtures quite a bit compared to gasoline. Ethanol's specific gravity is much lower than pump gas, so it requires more per specified volume.