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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 01-03-2010, 08:41 PM   #1
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Why use premium gas?

Let me first say---I'd use it, no question.

My friend who has a Camaro SS refuses to fill it with premium. He doesn't think it needs it and won't pay out of principal.

His idle has a slight fluctuation I have noticed.

Give me some concrete reasons why he should.
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Old 01-03-2010, 08:45 PM   #2
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He is also killing this hp #'s by doing this. It really slows them down to run anything other than premium. If it was a v-6 then it wouldn't matter.
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Old 01-03-2010, 08:49 PM   #3
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He is also killing this hp #'s by doing this. It really slows them down to run anything other than premium. If it was a v-6 then it wouldn't matter.
says he doesn't care about the 5hp he's missing.

I think GM doesn't randomly specify premium fuel engines. Big turn off to alot of people and sometimes even a deal breaker.
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Old 01-03-2010, 08:53 PM   #4
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says he doesn't care about the 5hp he's missing.

I think GM doesn't randomly specify premium fuel engines. Big turn off to alot of people and sometimes even a deal breaker.
Go through the threads on here and you will find that it's a lot more than 5hp lost over it. It does state to run premium in the SS or performance will be reduced.
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Old 01-03-2010, 09:07 PM   #5
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the price of a tank of premium is only about $3 more than a tank of regular. there's more ways to save a couple dollars than making your engine have valve clatter and detonation
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Old 01-03-2010, 09:14 PM   #6
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If you go back to multiple threads, and dyno runs the low octane table loses you about 20 HP and 25 torque, just look at low dyno's verses heathy engines. At least with L99.
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Old 01-03-2010, 09:17 PM   #7
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If you go back to multiple threads, and dyno runs the low octane table loses you about 20 HP and 25 torque, just look at low dyno's verses heathy engines. At least with L99.
yeah, thats how the whole fuse-pull thing got started
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Old 01-03-2010, 09:19 PM   #8
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The knock sensors are quick enough to pull timing to avoid damage, but the reduced fuel economy that will result negates any savings from useing a lower octane.

The power loss could be 20-25hp or more depending on how close the factory tune is.

These cars have a 11:1 compression ratio....premium is a must!

Bottom line is, why? We have a customer that spent the $$ for a new Z06...and he won't pay the extra for premium. Crazy!
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Old 01-03-2010, 09:29 PM   #9
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For us that have been here for a while we know that issue of filling up a L99 with low octane fuel. . . There's been many topics on this.

My 2003 SRT-4 actually pulled the boost and retarded the timing if you didn't use High test fuel.
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Old 01-03-2010, 09:48 PM   #10
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The knock sensors are quick enough to pull timing to avoid damage,
sorry , i was thinking of a car with a tune thats not pulling timing
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Old 01-03-2010, 10:27 PM   #11
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sorry , i was thinking of a car with a tune thats not pulling timing
Good point. A tuned car will still pull timing unless the knok detor settings are disabled or turned way down...and the only time we disable them is when doing a bracket tune for the drag racers that want to run the same# run after run. So you should still be safe even with a tune as long as the tuner is good. But we do see some tunes come in from a well known "traveling tuner" that disables it to cover for some tuning weaknesses he has...and have seen the melted pistons as a result.
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Old 01-03-2010, 10:37 PM   #12
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Im going to run 87 all winter. It doesnt hurt anything. Your car will just switch to the low octane table. But expect it to be slower. No damage will occur, thats just stupid.
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Old 01-03-2010, 11:32 PM   #13
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Quote:
Originally Posted by avro206 View Post
Let me first say---I'd use it, no question.

My friend who has a Camaro SS refuses to fill it with premium. He doesn't think it needs it and won't pay out of principal.

His idle has a slight fluctuation I have noticed.


Give me some concrete reasons why he should.
If his car has a manual transmission then It will do this..

It's the lope from the big engine it has lol..

Mine does it, and it tickles me to see the needle moving up and down at a stop light lol
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Old 01-03-2010, 11:47 PM   #14
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ok then if it make that much diffrence in the SS. then why no difrence in the LT with a 6 under the hood. the manual says regular but i use mid grade from chevron so should i be useing regular or should i use premium
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Old 01-03-2010, 11:51 PM   #15
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ok then if it make that much diffrence in the SS. then why no difrence in the LT with a 6 under the hood. the manual says regular but i use mid grade from chevron so should i be useing regular or should i use premium
you have direct injection it runs fine on 87. But you can use higher if you want.

6.2L does not have DI
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Old 01-04-2010, 12:10 AM   #16
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ok then if it make that much diffrence in the SS. then why no difrence in the LT with a 6 under the hood. the manual says regular but i use mid grade from chevron so should i be useing regular or should i use premium
Oh WOW!
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Old 01-04-2010, 12:39 AM   #17
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Your friend buys a Camaro SS and then refuses to put Premium gas in it out of principal?

I'm sorry but your friend sounds like a complete dick. I call 'em like I see 'em.



Do you guys use Chevron's premium, Shell's, which one? I use Shell's premium. Are they even different from one another?
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Old 01-04-2010, 12:48 AM   #18
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bottom line

If premium gas is Required, you must use premium or risk damage to the engine.

If premium is Recommended, you can get away with using regular or mid grade octane at the expense of performance.

If your car doesn't recommend or require premium but you are using premium, you are wasting money.
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Old 01-04-2010, 01:21 AM   #19
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I used 87 cause I didnt know any better until i came to this site with the complaint of bad knocking and pinging on hills. After using 91 it was gone. It responds so much better
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Old 01-04-2010, 01:24 AM   #20
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you should be putting premium in there and thats the bottom line.
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Old 01-04-2010, 01:33 AM   #21
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Just so you guys know, the cpu has two octane tables it runs its spark from, low and high. You can run either octane fine without the risk of damage, but with 87 you will be down on power.
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Old 01-04-2010, 10:19 AM   #22
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I have been running 87 for three months now I will re dyno this munth to see if i lost power in AZ i don't think there is much deference in the two.
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Old 01-04-2010, 10:21 AM   #23
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LOL.

Your worried about using the Vararam to get the most power for an intake, then you run 87 octane to really compliment it. Sorry man, but thats funny.
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Old 01-04-2010, 10:23 AM   #24
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i always used premium...even when I would drive my old honda accord. LOL.

So, now with the SS, you get your a$$ Ima keep on using premium.
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Old 01-04-2010, 10:30 AM   #25
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I use 93 all the time, it is my second vehicle so I don't have to fill it up that often. Maybe once a month.
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