To answer the question of what do i use, Shell VPower and only shell vpower. It's the only gas that keeps my CEL from coming on. Then again, I'm quite sure one of my pre cats is going and this seems to be just a band-aid.

Shawn Clone Jezabel- 1999 SE Sport V6 MTX- Severly wounded, comatose Silver frost/Black Exterior-Midnight Blue Interior The Firecracker- 1995 Mystique LS V6 MTX stock and backfiring like a rifle shot I have 3 loves, my God, Brittany, and my Car.