93+ octane

i was wondering if having 93 octane in my 87 turbo okay? i also put octane booster in it. will this damage my car? i have a super monitor and for the economy it say 10.3 mpg, is the normal for my car? i burn hella lota gas! Also my rpm jumps rapidly and theres no engine light on, what might it be?

the 93 octane in your car is fine. Some cars require it such as the MKIV supra but you can cheat in the winter time and run 89 if you want. And all of this stuff about higher octane gas makes your car more powerful is not true, the RESULT of the gas does make your car more powerful but higher octane gas only serves a purpose of reducing the detonation in your car. In my oppinion, I'd run what the car tells you to. If it says run 89 or 87 I'd do that unless you have a turbo car where then you have to run 93 octane. If not don't worry about it. But putting higher octane gas can help with cleaning your fuel system.

thank you for that info