i have a 96 sentra with the timing to 8 degrees from the factory, i'm gunna push it to 15, but i live in cali where 92 is very hard to find, everyone seems to have 91 around here......is that ok to use?
It's not us "tree-huggers" that are causing the problem. The issue stems from supply and demand.Middy said:Be thankful you don't have a bunch of tree huggers out there trying to save the environment with 91 gasoline because it makes soooo much of a difference in polution over 92. I wonder if that's BS or if it's really true.
My timing is at 15 degrees - I followed the write-up on www.sentra.net that includes getting the ECU into diagnostic mode, etc. etc. I got pinging a few times with 87, and 92 is pretty cheap here. My engine is old (109k on the clock) and was not very well cared for by the six previous owners. It's a bit of added insurance for me and some more peace of mind.bahearn said:So far, not one person paticipating in this thread indicates that 90+ octane is really needed in their cars. I suspect that many of you who claim to have advanced your timing didn't follow the procedure in the FSM and you gained nothing by turning the distributor. The ECU can do a lot of adjusting on its own, so if you don't get the ECU in diagnostic mode, you'll get nothing.
Even still, I have my timing set to 17º on my SE-R and ran 87 octane exclusively on the street. I never detected any pinging or rattling, the hallmark sounds of detonation. For track days, I ran 91 octane only due to the tendency of the car to overheat.
If you aren't turbo or squeezing, stick with 87 octane. Anything else is just a waste of you modding budget.