wat kinda gas do you use?

[rafael]

i was readin an old issue of super street and it said that not all cars need supreme(or the best gas). so i was wonderin wat gas u guys or gals use. i have an 01 gt,so i might not need the same gas as a gt-s
thanks for any re-plys

[Bling]

Look in the owners manual.

[CelicaNamja79]

I own a GT and my ride drinks CHEVRON 92 octane supreme.
Why not treat your new car with better gas, after all, it only makes like a dollar difference between plus and supreme for the whole tank. Go figure.

[baNanA_ryCe]

but what if i have normal gas now? can i just start adding in supreme? or should i not add it in my auto gt?

[Bling]

It is pointless to use the higher octane gas in a GT. Just because it cost more doesn't mean its better for your car.

[DevlynSyde]

use the gas the car manual recommends, anything higher and you might as well be burning the dollar you spent each week.

[WRENCHHEAD]

for gt use 87, and gt-s use 92. anything else you will hurt engine and it performance. high octane in a gt and fuel will not burn right, which MAY lead to engine deposits accumulating over a long period of time, and lost engine performance due to a slightly slower combustion of fuel. on a gt-s low octane fuel may lead to detonation, due to the fact that the engine has a higher compression than the gt engine.

[Pribilof]

send me that dollar you're going to burn each week. I'll make sure it goes to good use. Like giving me a quaife lsd!!!! :thumbup:

[rafael]

so i shouldn't use supreme gas in my gt, i'll just be wastein money?

[Da Kine Guy]

Originally posted by rafael
so i shouldn't use supreme gas in my gt, i'll just be wastein money?

Yup

[yakkosmurf]

Originally posted by WRENCHHEAD
for gt use 87, and gt-s use 92. anything else you will hurt engine and it performance. high octane in a gt and fuel will not burn right, which MAY lead to engine deposits accumulating over a long period of time, and lost engine performance due to a slightly slower combustion of fuel. on a gt-s low octane fuel may lead to detonation, due to the fact that the engine has a higher compression than the gt engine.
This is not completely true. Running higher octane gas in a car that doesn't require it will not hurt anything. You're just paying extra money for not a lot of benefit. 92 octane will burn just fine in a GT. Higher octane gas has a more stable ignition point. It can withstand higher compression before self igniting (before the spark plug goes off). It will work the same way in a GT. It will burn just fine when the spark goes off, but won't ignite before then. 87 will do the same thing in a GT. The only advantage to putting 92 in a GT would be that your ECU can advance the ignition timing further before knocking occurs. However, the max settings that the ECU is allowed to advance the timing is probably not enough to causing knocking on 87 octane.

[Speedmaniak]

Originally posted by yakkosmurf

This is not completely true. Running higher octane gas in a car that doesn't require it will not hurt anything. You're just paying extra money for not a lot of benefit. 92 octane will burn just fine in a GT. Higher octane gas has a more stable ignition point. It can withstand higher compression before self igniting (before the spark plug goes off). It will work the same way in a GT. It will burn just fine when the spark goes off, but won't ignite before then. 87 will do the same thing in a GT. The only advantage to putting 92 in a GT would be that your ECU can advance the ignition timing further before knocking occurs. However, the max settings that the ECU is allowed to advance the timing is probably not enough to causing knocking on 87 octane.

I agree.....but when you put on any performance mods you might want to switch to highter octane to get the most out of them.

[oldster]

Originally posted by Speedmaniak


I agree.....but when you put on any performance mods you might want to switch to highter octane to get the most out of them.

Only if you have gone to FI, upped the compression or advanced the timing.

[yakkosmurf]

Originally posted by oldster


Only if you have gone to FI, upped the compression or advanced the timing.
Correct. You'll see no performance increase with higher octane gas when you add an intake or exhaust. The first modification that would benefit from the octane boost would be new cams. Looking at what's available for the GT, you wouldn't need to go with 92 or higher unless you added a turbo or higher compression pistons. If you're just running bolt ons, save you're money, buy 87, and use the savings toward performance parts.

[Speedmaniak]

Originally posted by yakkosmurf

Correct. You'll see no performance increase with higher octane gas when you add an intake or exhaust. The first modification that would benefit from the octane boost would be new cams. Looking at what's available for the GT, you wouldn't need to go with 92 or higher unless you added a turbo or higher compression pistons. If you're just running bolt ons, save you're money, buy 87, and use the savings toward performance parts.

:ugh: I guess I should have been more clear....HI performance mods. I.E. Forced Induction, NOS, Ignition Upgrade, and such...:D

[yakkosmurf]

I don't have much experience with nitrous, but I can see how a higher octane would let you run better there. As for the ignition upgrade, I doubt it would make any difference at all. A higher power or longer spark is going to react about the same with either grade of gas.