Ok we have had 6 or 8 that were no joke and required zero reason to open the engine. We change the oil via the reminder(7500miles) run them over GVW, idle them way to much etc. They only get the finest whatever they have on the shelf oil also lol. We recently got a ford transit van because there is no chevy vans available new or used really. I am afraid the ford engine will not be near as tough.