i have always wondered, why does walmart never seem to feature its own supertech brand in its oil change specials? for close to its current $20 conventional quaker state green bottle special couldnt wm offer a semi or full synthetic supertech special? i know that oil makers offer incentives to wm for pushing their brands as specials, but by not headlining supertech wm sends a subliminal message to consumers that its supertech is second class.