i usually put 89 gas in my car but last night i put 87 and i do not like it very much seems like it does not have as much push. (could be just me tho) Is there away for me to tell? another thing would that be bad if i put 89 again next time i fill my tank up?
It could just be your imagination or it could be that you got some bad gas. Try another station.
it could have been bad gas.
but putting a higher octane fuel in your car does boost power. (i noticed than when i put shell v-power gasoline my car ran noticeably better than what i put exxon premium unleaded in)
a drop in octane ratings does equal a drop in performance. 2 octane points should only barely be noticeable though.