last summer while i was working at my friends garage, his son (who worked at a valvoline oil change place) came in to work for a few days doing simple stuff like oil changes.
i had to retrain him on how to change the oil.
he told us that it was valvoline that taught him to double wrench the drain plug when tightening it, use an oil filter wrench to tighten the oil filter, and other silly stuff like to never grease the front end because most new cars dont have grease fittings, so don't bother to check for them.
