Do I need the Ap to change octane? I run 89 octane now, have been for 7K miles so far. Manual states you can run 87 although 93 is recommended. I bought the car more for economy reasons although if I run 93 how much more performance will I get and will there be mileage improvement? I drive it light footed and get over 39 MPG now. The car is my long distance commuter for work and my budget is tight, I'm close to retirement.
And how about E85- can the car run on it, is it good or bad? I assume the Ap is needed and what else is needed for the E85 tune? I already have MBRP exhaust. Will it provide increased performance and what about gas mileage? I am looking at it as a cost savings- if I invest $500, will I get the pay back over 100K miles since E85 is cheaper than even regular and much cheaper than 93. (I have a gas station 1 mile from my house that has E85.)
And how about E85- can the car run on it, is it good or bad? I assume the Ap is needed and what else is needed for the E85 tune? I already have MBRP exhaust. Will it provide increased performance and what about gas mileage? I am looking at it as a cost savings- if I invest $500, will I get the pay back over 100K miles since E85 is cheaper than even regular and much cheaper than 93. (I have a gas station 1 mile from my house that has E85.)