Originally Posted by D4u2s0t

you guys are idiots... octane is nothing more than gas's resistance to detonation... you are supposed to use the lowest octane that does not product knock... end of story.. nothing else... game over... end yourself...

using premium in a 2.2 is good for one thing, and one thing only... spending more money than you have to... you can trick yourself into believing that it's actually benefitting your car, but it's not... again, end of story...

people associate high octane with more horse power INCORRECTLY because higher horsepower engines call for higher octane... why?? do some research for yourself... i'm sick of covering the same topic over, and over, and over because some ricer thinks he's getting better gas mileage and 20 more hp from using 100 octane in his base model 126 whp car...

Originally Posted by marerick007

You might want to read the owner's manual. You must be getting some crappy gas for it to run bad on 87 octane, simply put. If it was tuned to a higher octane, then it would say it in the owners manual like the SS/SC recommends Premium.

Originally Posted by rallyyellow06

The only thing that would matter for our gas is Top Tier Gas. Such as SHELL. It reduces the carbon build up over time and keeps the engine clean.

This Octane crap is just that, crap. Theres no way you can tell 100% that 90 octane gives you 5 more mpg. Its impossible because the driving conditions will never be the same or close enough on a city or highway to reproduce accurate results.

Originally Posted by cawpin

I never said it gave me more power. I said it prevents the copmputer from retarding the timing and reducing power, which my car does, just like my previous 2003 Cavalier.



I have tested it on both of the ecotec cars that I have owned. It made a difference. I didn't expect it to, but it did.



Yes, I can tell you 100% that it increased my milage. Like I said above, I didn't think it would make ANY difference at all. The numbers don't lie.

Also, I am going off of ACTUAL numbers. I am not going off of the computer. I divide gallons into miles. I do record the computer reading for comparison and it ususally off by 2-7%. I am done arguing. I suggest you try it your self in your own vehicles. If it doesn't help, good for you, you don't have to buy the more expensive fuel. If it does help, you get better milage and prolong the life of your engine and exhaust system.

Originally Posted by cawpin

I never said it gave me more power. I said it prevents the copmputer from retarding the timing and reducing power, which my car does, just like my previous 2003 Cavalier.

I have tested it on both of the ecotec cars that I have owned. It made a difference. I didn't expect it to, but it did.

Yes, I can tell you 100% that it increased my milage. Like I said above, I didn't think it would make ANY difference at all. The numbers don't lie.

Also, I am going off of ACTUAL numbers. I am not going off of the computer. I divide gallons into miles. I do record the computer reading for comparison and it ususally off by 2-7%. I am done arguing. I suggest you try it your self in your own vehicles. If it doesn't help, good for you, you don't have to buy the more expensive fuel. If it does help, you get better milage and prolong the life of your engine and exhaust system.

Originally Posted by Ownage of Cawpin

The recommended gasoline for most cars is regular 87 octane. One common misconception is that higher octane gasoline contains more cleaning additives than lower octane gas. All octane grades of all brands of gasoline contain engine cleaning detergent additives to protect against engine deposit build-up. In fact, using a gasoline with too high of an octane rating may cause damage to the emissions system.

Originally Posted by Ownage Part2

Premium Gasoline
Certain high performance engines benefit from use of high octane fuel. For other engines, using a fuel with a higher octane rating than the vehicle requires sends unburned fuel into the emissions system and catalytic converter. This puts unecessary stress on the emissions system. For some vehicles, a rotten egg smell coming from the tailpipe signals use of too-high octane gas.

Originally Posted by ChrisAult2004

you guys can say what you want about there being no noticable difference in our cars when we use 87 or 92/93 octane gas, but i totally disagree. i am a rather spirited driver, and i used to driver a camaro tuned specifically for premium fuel only. after i got the balt it was habit to put the good gas in it, and i have done so for all 6700 miles i have put on the car. last week i descided to see the actually differences (if any) in my car with regular gas in it. the acceleration feels the same to me, i cant tell a difference in performance at all, however, my gas mileage has plumitted. with my driving, done in the city for about 80+%, i typically average 27+, and i have never personally see less than 25 otherwise... hell i averaged 27.3 on the way to our last columbus meet going 100 mph most of the way lol. after putting the regular fuel in my car, i immeadiately noticed the change here. in the city im lucky to break about 23, and i only averaged 27 on the highway right after filling up.

to me, its more than worth the $.20 and i will never put regular in my car again. please do not flame me saying that our compression does not justify the use of higher octane fuels, this is just what i have experienced.