[nhromyak]

Actually, going aginst popular belief, if you run premium fuel you COULD get worse emissions. Remember 92 octane fuel has a SLOWER (relative to engine speed/compression ratio/ 89 octane fuel) flame front than 89 octane. That's the reason for running 92 octane in higher compression engines. It burns slower, no knock.

SO if you don't NEED 92 octane and you WANT to pass emissions, run good QUALITY, LOWER octane fuel!

Hopefully, you don't have carbon buildup in the P&C's.

Good luck!