| Nop, does not decrease performance but you're gas talk will probably get a tad less milage. In fact, properly tuned, you can increase performance since E85 is 85% Ethanol that has an octane rating of 104 (rather than 93 or whatever). This means you can generaly increase cylinder compression, through higher RPM, w/o premature detonation. And cleaner the gasoline!! Is the eay to go!!! | 
