What octane level to use?

[dorkins]

yea... but i havnt been able to figure out my problems... im thinkin thermostat? the temp is ALWAYS at 190 (i think... its like at the 1/4 line

[camaroincal]

Basically, our cars can take what you give it(87-93) and run fine, if it is running well. If you drive mostly freeway and drive like a grandma, and your car is well maintained, 87 is fine. But if you're like me and your car is a garage queen and you mainly take it out for weekend thrashings on the backroads and rev the piss out of her from time to time... ;) ..then you can benefit a bit performance wise using 91.

[Need4Camaro]

I have a 97 RS with the Y87 Package, and CAI... I switched to V-Power Premium from Shell (93 Octane) and noticed absolutely NO difference between it and 87 Octane, I didn't get a performance increase, no smoother ride/accelleration, no increased gas milage at all. I typically get 340 - 380 a tank depending on how I drive, with 93 I got 360... My last fill up with 87 Octane got me 370 so it did me absolutely no good...

[96RS Alex]

I use Shell V-Power 93 and my SES light stays off. Soon as use the 87 stuff it pops back on however the 93 V-Power makes my car idle smoothly and accelerate better. I will add that I've done spark plugs and wires recently with an oil change so I'm happy with Shell at $2.12 a gallon for the premium fuel blend. I haven't used Sunoco or Mobil premium grades yet though. Some posts recommended me replacement of EGR or O2 sensors and I will do so in the spring hopefully and post my results then.

[Nicklz]

Damn 340 to 380 a tank??? I'm lucky if I hit 260!!

[99v6cam]

Originally posted by Nicklz:
Damn 340 to 380 a tank??? I'm lucky if I hit 260!!

That sucks. I usually get a bit over 300 but I never fill completely anymore. 93 octane and intake w/full exhaust = gas mileage god :D My car loves teh highway, shame I never go on it...

[shenanigans]

I run, 87, and throw in a few gallons of 93 when its around track time. Never notice a difference, their are times I only run 87 at the track I just do it to be safe, woudl rather have a little bit better octane then to little and expereince a little knock, and have the PCM retard the timing at the track. not so worried about the timing difference more worried about the gas not being up to the listed octane level.

On my car never noticed a difference to even mention.


also for what its worth ran 100 octane, and did nothing for my car at the track but keep it from sputtering because I almost ran out of gas, and wasn't going to be able to leave the track to a gas station.

[Richardcoelho]

Re: What octane level to use?

alot of it is all in your head, if you use 93 octane the car runs richer,making less power.so while it keeps the engine clean it just costs more and wastes more so if you want to be anal just run 89 for the hell of it.

[bigbrian442]

Re: What octane level to use?

alot of it is all in your head, if you use 93 octane the car runs richer,making less power.so while it keeps the engine clean it just costs more and wastes more so if you want to be anal just run 89 for the hell of it.

First your replying to a 3 year old thread!

Second please explain how higher octane of gas makes the car run rich and make less power?

[Blizzard242]

Re: What octane level to use?

First your replying to a 3 year old thread!

Second please explain how higher octane of gas makes the car run rich and make less power?

There's been a lot of that lately. A few active new members have been around.

I'm gonna agree with brian and say.. What?