Possible Gas Problem?

[faroutguy]

Hi,

I know I saw the other 2 thread page about gas and this isn't the same question as I realize now from reading it I should not be putting anything less then 91 through my 04 gp gtp. Now on that same subject... I have had my car for a year and a half and I have always run 87 through it. I plan to switch over now as to not cause any more possible or future damage, but what damage could I have possibly caused. I don't seem to have any problems with it at all except maybe on start up it stutters a bit on very rare occasion. I have occasionally put the pettle to the floor but it never seems to struggle when the charger kicks in.

Thanks

[tblake]

Hard to say, possibly nothing, possible hairline cracks in your pistons, possible chunks missing.

Best to run 91 octane or higher with the 3800SC motor.

[richtazz]

The biggest issue with low octane fuel in a S/C 3800 is with detonation. If you constantly hot-rod it, you run a higher risk of doing engine damage. The owners manual says 91 octane or higher is required, not just recommended. The most common engine damage occurs on cyl #4, as it is in the center in back and runs the hottest.