· Not Anymore.
Is your argument saying that you will get the same power on 87 as 91 or that 91+ will make more power. A 350Z will NOT make the same power on 87 as it will on 91, the ECM will retard the timing.IreiMember said:always try to stay with what oem specs are and what they reccomend. the rating on fuels is nothing other than a ping rating. absolutely nothing will ever happen if you use 87 it may not burn as clean as 91 obviously. but as far as power gains lol please... thats like saying puting in 110 octane in a car with a compresson ratio of 9:1 is gonna make it faster LOL .
as far as your specific problem goes it could be many things and to many for me or anyone else on this forum to speculate on. it sucks any way u slice it especially for a new car.