What octane are you guys youing at the pump? I was wondering if different octanes give better gas mileage in the 2.0? I'm using 87 right but was going to try 89 to see if there is any difference.
Most of this is correct, but the biggest thing is that if the engine is not tuned to run whatever grade of fuel you are using, you will lose efficiency / power regardless. Think of it like this:It is not possible! Technically more octane means higher potential restistance of soon combustion at high compression engines. It means if your engine is in high compression and use low octane gas, it will burn at sooner time, before sparks burn! and it will knock your engine and make less MPG and big failures on the engine in long time. But in vice versa, if you use more octane than the requested, it will not harm your engine and make no lower MPG. It will be just waste of money. so your lower MPG with 92 was caused by sth else, not gas!!!