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The_Wraith
11-16-2005, 07:54 AM
I did a search before posting this, but didn't see anything like my issue...

I don't know if this is even a issue, but on my '04 GAGT V6 29,xxx miles, I dive it to work, which is a hour drive each way between 50-60mph, (not too many stops, mostly staight drving). Anyway, I always baby the car (need it to last a while) I drive it real easy ect... anyway, when the rare ocurance that I need to take off fast, or pass someome, I will hear it ping for a little bit, then it will stop ping, and keep accelorating fine.
I always use Mobil gas 87.

does anyone elses 3400 do this? Does it sound like something is wrong? Or is it because I mostly drive it like an old lady?

atc3434
11-16-2005, 08:25 AM
Sounds like you're getting a load of crappy gas. You're pretty sure its detonation, or just sounds like it? Easy way to find out, fill up with 93 next time, and see if it goes away. I'll get detonation on 87 octane. Most people will tell you it doesn't matter, I disagree. Especially in the warmer months, 87 will often give you pre-ignition.

Mike Jung
11-16-2005, 11:05 AM
Is Mobil 87-octane gasoline blended with ethanol ?

If it is, see: About 87 vs. 89 Octane Gasoline ? (http://www.grandamgt.com/forum/showthread.php?t=10606)