Feel free to put this under the stupid question of the day but wondering if anyone has recommendations on national chain oil change service centers (Grease Monkey, Valvoline, Firestone...)? I've always used an indie shop until they blew their oil tank all over my vehicle and I don't have time to sit at a dealer for hours. The reason I don't do it myself is my extended warranty requires oil changes be done by a "certified mechanic". Thanks!