use premium gasoline after twice regular gasoline

[PoorMansCamaro]

average person may not notice a difference. if you are trying to squeeze out every ounce of performance, there is a difference.

You are not wasting money by using higher octane if there is a difference...which there is.

[Tyler360]

The first two tanks of fuel for mine was regular. Since then, my camaro has been on a strictly premium diet. To me it's the thought that counts. For example: name brand pet food and the cheaper generic brand. A hard core serious pet owner would choose to feed there pet the name brand. Name brand tastes better(although being pet food I wouldn't know lol). Premium burns better. But that's just my opinion..

[WCoolBreeze]

OK, so now my next question is, is your car a 1LT/RS or a 2LT/RS??

Walt B.

[rs-lt-camaro-]

Originally Posted by essa

sorry LT/RT

RT ?? isn't that for the challenger

[PoorMansCamaro]

Originally Posted by WCoolBreeze

OK, so now my next question is, is your car a 1LT/RS or a 2LT/RS??

Walt B.

i'm going to go out on a limb and say 1lt, since it says ls1 as what she drives. lol

[derklug]

If your car needs 91 or above octane, you have to use it or face detonation(spark knock) issues. If your car is rated for 87 octane, using premium makes you and the oil company happy, but your car could care less.

[essa]

Originally Posted by WCoolBreeze

OK, so now my next question is, is your car a 1LT/RS or a 2LT/RS??

Walt B.

1LT/RS

[essa]

I don't know, I think the premium give me improvement in power and mileage
Now I have another question ??

why i have 225 Miles on a Tank and Average is 10 mpg, Is there a problem or is it normal because I've reset the car info. A friend said to me, must be drive for long distance until it is reset Again

thx guys

[Nightfall]

i like on all my cars run mid grade 89 i agree runing 91 is useless and a waist of your money unless your car needs it *cough*v8*cough*

[GNVenom]

Originally Posted by woodj

Your car is made to run regular gas. You may experience pre-detonation if you run higher octane fuel than is recommended. That is not a good thing. Someone can chime in if I'm mis-speaking.

You are mis-speaking...it's just the reverse. You use high octane to lessen detonation, not increase it.

You don't need higher octane than is recommended. In fact, if you're looking for the best gas mileage, you're probably driving the car fairly easily, not matting the throttle, shifting at the recommended RPM, and keeping the engine load at an average, i.e. "road trip".

Increased engine load leads to detonation when the octane is inadequate. You shouldn't see any real increase in gas mileage if using the lowest octane available and driving steadily. That said, if you drive the car hard, and see detonation via monitoring, yep, your mileage will suffer. Higher octane, while more costly, will help reduce detonation and keep the power band up - leading to better gas mileage - ONLY if you drive the car hard.

The ECU has two different modes of timing vs. load events, and the first mode will be utilized when detonation is minimal - the second "lower timing" mode will be used if detonation is frequent. It stays in this mode if frequent detonation is monitored, and reverts back to the first mode if detonation is held at a minimum. FWIW, lower timing leads to less engine power, which indirectly affects gas mileage.

I have owned several V6's (well, turbo engines) and can tell you what detonation can do if it's severe. You don't want to go there. The turbo engines are a different story: Boost increases compression ratio pressure. That's really the detonation factor. This doesn't apply so much to normally aspirated engines. Octane rules change when you compress air.

[Tigwelder]

Your car will run fine on 87 octane, but it will idle smoother and have a slightly quicker throttle response if you use 89. Don't listen to the SS guys, they don't usually know what their talking about when it comes to a V-6 engine.

[jshaf]

I ran 89 when I first bought mine over a year ago but it ran rough, started running 91-93 and the the difference was very noticable, has run very smooth since and I haven't looked back. Premium only for me!!

[woodj]

Originally Posted by GNVenom

You are mis-speaking...it's just the reverse. You use high octane to lessen detonation, not increase it.

You don't need higher octane than is recommended. In fact, if you're looking for the best gas mileage, you're probably driving the car fairly easily, not matting the throttle, shifting at the recommended RPM, and keeping the engine load at an average, i.e. "road trip".

Increased engine load leads to detonation when the octane is inadequate. You shouldn't see any real increase in gas mileage if using the lowest octane available and driving steadily. That said, if you drive the car hard, and see detonation via monitoring, yep, your mileage will suffer. Higher octane, while more costly, will help reduce detonation and keep the power band up - leading to better gas mileage - ONLY if you drive the car hard.

The ECU has two different modes of timing vs. load events, and the first mode will be utilized when detonation is minimal - the second "lower timing" mode will be used if detonation is frequent. It stays in this mode if frequent detonation is monitored, and reverts back to the first mode if detonation is held at a minimum. FWIW, lower timing leads to less engine power, which indirectly affects gas mileage.

I have owned several V6's (well, turbo engines) and can tell you what detonation can do if it's severe. You don't want to go there. The turbo engines are a different story: Boost increases compression ratio pressure. That's really the detonation factor. This doesn't apply so much to normally aspirated engines. Octane rules change when you compress air.

Thank you for your explanation and straightening me out.