Octane
#18
better the gas doesnt always mean better the performance, the higher the octane, the more resistant it is to combusting before the spark of the ignition, which is why in turbocharged cars its important to run higher octane. Basically dont run 87, car will prob retard the timing if it detects knock, 89 will prob be alright, i run 93 just cause it goes 87-89-93 where i live. u can advance the timing and run higher octane and get a lil bit of performance out of it, to a degree, but if u run very high octane (ex 100) then u basically not doin nething to benefit ur car...on a n/a 240 at least....
#21
i would normally recommend buying 91... but for some reason my car just doesn't run as good when i run 87... but i guess thats just me... strange thing them corolla engines... oh and i guess i forgot to mention i ONLY buy chevron gas... so that'll make a difference as well...
#28
Originally posted by WingsNThangs
91 S13, 100% stock KA24DE, 110K miles, 87 octane.
91 S13, 100% stock KA24DE, 110K miles, 87 octane.
Dr.
#29
Originally posted by drnovascotia
I'd strongly urge you to not purchase the cheap gas, the extra .10 cents is worth it per gallon, trust me. Read the other posts why.
Dr.
I'd strongly urge you to not purchase the cheap gas, the extra .10 cents is worth it per gallon, trust me. Read the other posts why.
Dr.
Granted, 91 octane is probably better, but I'm not too sure if the difference in quality is warranted by the difference in price. And is there anything that says 87 can harm the 240SX engine?
My father, a PhD'd mechanical and aerospace engineer, approves of the 87 gas I use in my car. I think the only advice I would take above his is that of an independent Nissan specialist. Or another mechanical/chemical engineer. Any one out there fall under one of those categories? What is your take on this?
The FWD Altima, RWD XTerra, and RWD Frontier uses KA24DE engine, just as the 240SX does. But these cars are recommended regular gas by the government. However, the federal government (www.fueleconomy.gov) states that the 240SX should use premium. Why is that? How much do you trust Uncle Sam and his statistics?
And I know there's always some member who responds with "It's your car, your wallet, and you can put whatever gas you want because I'm an ******* and im indifferent". To those guys, don't bother. I'm sure many people are interested in the issues I have raised as well.
Last edited by WingsNThangs; 10-31-2003 at 02:51 PM.