Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - playing around with Octane levels on a stock KA

Nismo180 · 11-30-2005, 02:14 AM

On a technicality you'll get more out of the lower octane, reason being lower octane gas burns a little faster, the retarded flame front speeds are half the reason higher octane works better in detenation prone events. Any tests you have read that state your motor will work better on higher octane were probably not performed in the most scientific of matters, the only "production" motors I know that can run on crap(comparatively) and get better performance off the good stuff are modern fuel injected bike motors. Most have 91 octane maps, but the ECU will detect higher octane fuel and run more timing etc. Your ECU doesn't do that. Get 87 and keep your money out of the gas companies pockets.

11-30-2005, 02:14 AM	#12
Nismo180 Leaky Injector Join Date: Jan 2005 Location: Bonney Lake, WA Posts: 105 Trader Rating: (0)	On a technicality you'll get more out of the lower octane, reason being lower octane gas burns a little faster, the retarded flame front speeds are half the reason higher octane works better in detenation prone events. Any tests you have read that state your motor will work better on higher octane were probably not performed in the most scientific of matters, the only "production" motors I know that can run on crap(comparatively) and get better performance off the good stuff are modern fuel injected bike motors. Most have 91 octane maps, but the ECU will detect higher octane fuel and run more timing etc. Your ECU doesn't do that. Get 87 and keep your money out of the gas companies pockets.