View Full Version : can you run reg. gas in an SS?
02Lightning
03-08-2007, 05:39 PM
The first tank of gas the dealer put in it for us was just reg. gas. With the compression being so high I didn't know if it would spark knock? Would the anti-knock sensor take care of that?
dubzman
03-08-2007, 06:03 PM
Yes you can although I always run 93 or higher when available you will see better performance out of the higher octane. Living in NJ having my gas pumped for me ive had the attendant by accident put regular in a couple times and had no problems.
Fishhunter911
03-08-2007, 06:07 PM
the ECM will take care of any pinging, but you will lose performance.
PROSPHOTO
03-08-2007, 07:41 PM
the ECM will take care of any pinging, but you will lose performance.
:iagree: But don't make a habit out of it :nono:
Best thing to do is run the TB near empty, then fill with the recommended gas :D
Envoy Fan
03-08-2007, 08:24 PM
After spending all the money to buy a new TB SS, seems like a crime for the dealership to save $4.00 and put in Regular fuel.
Make 'em pump it out and put in Premium :laugh: j/k
02Lightning
03-08-2007, 09:38 PM
Yea, I'll try not to put any strain on the motor. It only has 91 miles on it anyway.
Knightslugger
03-08-2007, 10:09 PM
I'm not too familiar with the SS< but what IS the CR of the two motors?
i couldn't image them being above 13:1...
PROSPHOTO
03-09-2007, 06:37 AM
Owners manual:
If your vehicle has the 6.0L V8 engine (VIN Code H), use premium unleaded gasoline with a posted octane rating of 91 or higher. You can also use regular unleaded gasoline rated at 87 octane or higher, but your vehicle's acceleration could be slightly reduced, and you might notice a slight audible knocking noise, commonly referred to as spark knock. If the octane is less than 87, you might notice a heavy knocking noise when you drive. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. Otherwise, you could damage the engine. If you are using gasoline rated at 87 octane or higher and you hear heavy knocking, the engine needs service.
TrailblazerSS
03-09-2007, 06:58 AM
Only one motor is used in the TB SS and the CR is 10.9:1.
carstuff44
03-10-2007, 05:16 AM
Oregon (like NJ) is a no self-serve state, so I'd not noticed the sticker inside the gas door. I used regular for 5-6000 mi before I noticed it. Never had any knocking, and the performance was great. Occasionally I will use the mid-grade or premium, but honestly cannot tell one bit of difference. It only says "recommended". On some cars it say "required". There is a difference.
2002SLT
03-10-2007, 03:31 PM
Oregon (like NJ) is a no self-serve state, so I'd not noticed the sticker inside the gas door. I used regular for 5-6000 mi before I noticed it. Never had any knocking, and the performance was great. Occasionally I will use the mid-grade or premium, but honestly cannot tell one bit of difference. It only says "recommended". On some cars it say "required". There is a difference.
It's only required if you want to get out of the SS what you paid for.
PROSPHOTO
03-10-2007, 03:34 PM
Oregon (like NJ) is a no self-serve state, so I'd not noticed the sticker inside the gas door. I used regular for 5-6000 mi before I noticed it. Never had any knocking, and the performance was great. Occasionally I will use the mid-grade or premium, but honestly cannot tell one bit of difference. It only says "recommended". On some cars it say "required". There is a difference.
It actually doesn't say "recommended," it simply says "use"...see post #8 for further info (that is out of the owners manual) :ugh:
2002SLT
03-10-2007, 03:41 PM
It actually doesn't say "recommended," it simply says "use"...see post #8 for further info (that is out of the owners manual) :ugh:
It actually says "Recommended" on the filler door.
PROSPHOTO
03-10-2007, 03:48 PM
It actually says "Recommended" on the filler door.
Don't have that on my LT, I was just going by the owners manual :D
02Lightning
03-10-2007, 03:49 PM
I just didn't know if the computer would pull all the timing out of it so it wouldn't spark knock. It's really not the gas that gives you the power anyway. It's the timing that gives you the power. The higher octane just allows you to have more timing.
PROSPHOTO
03-10-2007, 03:55 PM
I just didn't know if the computer would pull all the timing out of it so it wouldn't spark knock. It's really not the gas that gives you the power anyway. It's the timing that gives you the power. The higher octane just allows you to have more timing.
You are correct about the computer control; but if you actually hear a knock, the octane is too low for the computer to compensate for...the gas is probably a lower octane than advertised :weird: :hissy: