My 1999 Oldsmobile LSS presently has 140,000 miles and runs and looks like new, does not burn oil, I have used Mobil 1 for past year. It sits in the driveway year around, and starts every time all winter long. The only problem we have had is the fuel injectors going bad, 4 so far, randomly go out, we should of had them all replaced at once but could not afford it at the time. The fuel … regulator was recalled & replaced (freebie by GM) and driver's side window switch controller. Extremely dependable and A/C and surround sound stereo will blast you out of the car.