Hey guys,
I was wondering if anybody can help me out. I have a 2015 5th gen V6 camaro I been running the car on 87 octane for about 2 1/2 years. Recently I just got it tuned and the tuner told me to start putting 91 octane, but I noticed I get misfires once in while. Should I upgrade the fuel system like injectors, and coils.