Agree. E15 cars aren't set up for it. If used long term, it might have some effect on various seals, etc.You cannot/should not use E85 with any car that is not made for E85.
Here's the problem. My understanding is that the big power increase in using E85 in a turbo car is being able to wildly advance the timing, then running very high boost. We can't fool with the timing, and I doubt if the internals of this engine will withstand very much boost. Otherwise you're just running low grade fuel that the turbo can't compensate for.So what I'm hearing is once I turbo my car, if I have enlarged my injectors or added a 4th one; then mixing in some E85 with 87 octane gasoline may be more economical then buying 91-93 octane gas to prevent knock with a bit of a risk to my fuel filter and fuel line seals. Anyone got the math on what percentage of E85 it would take to bump 87 octane fuel to 90+? Can you just average the octane values, 105 for E85? ie. a 50/50 mix = (105+87)/2 = 96 octane? or is it not linear?
This is not correct. In fact it will typically MAX out the fuel trims adding all the % fuel allowed for positive correction.Thanks Johnny. Thats my general feeling and experience. One it gets down to 32 F and you do not use a block heater or go 3/4 or more throttle you wont get the fuel trim CEL.
The one part I heard that was not mentioned was that when e85 is burned the results makes the o2 sensor think the engine is running richer than it is and causes it to further lean out the afr where in fact it should enrich it.