What grade gas do you use?
Melting Slicks
Joined: Apr 2002
Posts: 2,620
Likes: 0
From: 20 forward gears to shift through in MD
Re: What grade gas do you use? (1bad85)
My 94 LT1 specifically says under the filler flap "Premium Fuel Recommended" and that's what I use... :yesnod: On both of my 66's I also use premium (again based on recommendations from GM for the engines).
Pro
Joined: Jun 2000
Posts: 686
Likes: 0
From: Crystal Lake, IL USA
Re: What grade gas do you use? (lampedusa)
5 clicks.
My manual says regular gas. I have premium in there now because I'm changing the timing tables to get rid of a bit of knock retard at 3200 RPM - don't want any chance of false knock to confuse things. In the end, if I can run more timing with premium and it helps performance I'll stick with it, otherwise not.
My manual says regular gas. I have premium in there now because I'm changing the timing tables to get rid of a bit of knock retard at 3200 RPM - don't want any chance of false knock to confuse things. In the end, if I can run more timing with premium and it helps performance I'll stick with it, otherwise not.
Burning Brakes
Joined: Jul 2002
Posts: 972
Likes: 0
From: Springdale AR
Re: What grade gas do you use? (chilihed'95coupe)
All I can find in Kansas City is 91 octane. I'd run 93 if I could find it.
Does anyone in KC know where I can get good gas?????
Does anyone in KC know where I can get good gas?????
I guess I'm surprised at all the different low octane availability chioces around the country.
I always use the highest octane that is available at the station I happen to be at when I get gas, but luckily for me most of the stations in my area sell up to 98 octane and there is one station that is completely out of my way by about 20 miles, but it sells 103 octane. Surpriseingly enough I only live about 4 1/2 hrs south of KC. Thats interesting that there is that much of an availability difference in octane in a 4 1/2 hr drive. I live in Northwest Arkansas by the way.
[Modified by vette92_1, 9:24 AM 8/10/2002]
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Verdad Gallardo
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: What grade gas do you use? (1bad85)
Sunoco 94 (ALWAYS) :yesnod:
No matter what the price is, I always get the best I can! :yesnod:
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: What grade gas do you use? (1bad85)
93 around town because it is easy to find. A few gas stations only go up to 92, I try to avoid them. On a stock LT1 you can probably get away with mid or low grade at teh cost of performance. On a modded car you really need to run premium. Something as simple as a cam and you suddenly have to run premium. Some people might find this strange as it doesn't actually increase the compression ratio, but by that logic neither does a supercharger or nitrous. Anything you do to get more air in the chamber and you're gonna raise the cylinder pressure and raise the octane requirement. I've never put anything less than premium in the vette and to be honest I would be afraid to.
Now my old car was a little different. It ran all of 8.3:1 compression. I could tell a difference with premium. That difference was that the car was harder to start, otherwise it ran fine. Again that makes sense. Premium is harder to detonate, thus in a really low compression engine you might be doing more harm than good.
I feel like the official answer is the best one "use what the owners manual recommends"
Now my old car was a little different. It ran all of 8.3:1 compression. I could tell a difference with premium. That difference was that the car was harder to start, otherwise it ran fine. Again that makes sense. Premium is harder to detonate, thus in a really low compression engine you might be doing more harm than good.
I feel like the official answer is the best one "use what the owners manual recommends"
Burning Brakes
Joined: May 2002
Posts: 1,143
Likes: 5
From: CASTLE ROCK CO
Re: What grade gas do you use? (JD 90 383)
87 runs fine in my 87. 87 is mid grade here in Colorado. Tried higher for a few tanks ,didn't see any difference. I also use chevron techtron every 3-4 tankfulls. I don't think the guy who owned it previously ever put techtron in.
It supposed to be great for bosch injectors.
It supposed to be great for bosch injectors.
