Premium Required? Not Necessarily

[Killswitch Performance]

This thread has alot of incorrect information.

SOME newer vehicles with advanced knock sensing & timing retardation abilities could possibly run lower octane fuel and adjust for it at the expense of power. Your high performance (high compression or boosted) vehicle isn't that way.

Current fuel mixed with ethanol is exactly what octane it claims to be.. meaning 87 octane is the overall octane. You can't mix more ethanol to change the octane rating without changing your engine tune. It takes 33% more ethanol to create the same amount of power as an equivalent volume of gasoline.. meaning 1:1 ethanol to fuel will result in a lean combustion with ethanol. Not cool.

IMO any motor over about 10:1 shouldnt even consider anything less than 93 octane or else detonation will occur.

Thank god. I didn't read any other post after yours, but guys, if you don't know what you are talking about, don't spread the misinformation.

And about E85. Since 1988 the Gov. mandated that all fuel systems be able to handle ethanol. So whoever mentioned that only GM, etc is wrong. Any car 1988 and higher will not suffer from running E85 through it. And also, be aware, that the 33% will probably require you to up the more then just your fuel map, 33% is a lot of fuel, so those of you already at 75% IDC, will need new injectors, and probably a larger, or dual fuel pump. Larger fuel lines as well. Then a tune.

E85 is not a drop in solution, and you cannot simply just mix it with your gas and go.

I would go on about the octane level, but I'm pretty sure someone else covered it already.

Tyler

[DirtyMechanic]

Thank god. I didn't read any other post after yours, but guys, if you don't know what you are talking about, don't spread the misinformation.

And about E85. Since 1988 the Gov. mandated that all fuel systems be able to handle ethanol. So whoever mentioned that only GM, etc is wrong. Any car 1988 and higher will not suffer from running E85 through it. And also, be aware, that the 33% will probably require you to up the more then just your fuel map, 33% is a lot of fuel, so those of you already at 75% IDC, will need new injectors, and probably a larger, or dual fuel pump. Larger fuel lines as well. Then a tune.

E85 is not a drop in solution, and you cannot simply just mix it with your gas and go.

I would go on about the octane level, but I'm pretty sure someone else covered it already.

Tyler

if i have to repalce the injector and fuel pump and a reflash to run E85 then the car CANT handle E85... and yes you can mix E85 and regular kinds of gas in a FlexFuel vehicle because the front O2 sensors (which really arent O2 sensors anymore more like Air/Fuel sensors and can read a much larger range than a O2 sensor) and read the car is getting leaner as the E85 is mixed in...