so i decided i wasnt going to do this oil change cuz i was feeling lazy...so i go over to firestone on bruce b downs and they put the wrong oil in my gst...i didnt recognize for about 3-4 days when they then told me it wouldnt matter and itll give me better gas milage... ( i was about to slap that dude) and so they say they switched it back out, but ever since the oil change, to this day my car smokes when im stopped at a light...not to mention in front of club skyy...(how embarassing) so im wondering wtf could be wrong...could it be that my oil is overfilled...because it appears they overfilled it the second time..my manager claims the smoke is blue...i say white...wtf shud i do???