Originally Posted by 1slow370

true the e85 concentrations do change from station to station, I have nothing against it it makes great power but a lot of station owners aren't very carefull with it. It absorbs water so the longer it sits in the storage tank at the station the better chance it will a weaker batch if the tank is old. Then there are issues with the actual percentage and octane of the gasoline in the fuel, if you tune with a batch that has less gas or more dissolved water than normal, or if you have to much gas in your tank when you add the e85 you can run into serious issues when you don't have an alcohol percentage sensor in the ecu.

Also right on squeeze, meth is cheap insurance when boosting a factory 11:1 block when a bad batch of fuel, on hot day, pushing the car a little harder than normal, maybe a bit of fuel starve and you started detonating. A lot of tunes are set up safe but **** happens, if the oem tune is set as safe as possible why did nissan bother putting knock detection on it in the first place?