First off some of you know I work at Walmart TLE. When I came here there were putting rotella 5w-40 in VWs (which im sure is fine but not for warranty use). Dino oil in GMs. (Again im sure its fine but warranty instantly voided.) I brought it up to the superiors. Most of them knew about it and said thats what should be going into these cars(the right oil), but the service writers weren't doing there job. Most got a stern talking too. They started letting me do service writing and I really like talking to the customers and sharing my oil knowledge.
Gm obviously uses Dexos oils.
What does Ford use?
What about Chrysler/Dodge?
Other manufactures im leaving out?
I know cars that require 0w-20 automatically get a full synthetic since thats all we carry.
Im just trying to learn the oil requirments of each manufacture that way Dino oil isnt going into cars that require synthetic...
On a side note, you know how Valvoline and other oil companies do those Myths vs truths? Holy cow. I can see why they make those videos now.
I had a guy come in and I recommend some oil to him (quaker state maybe?) and he had Pennzoil used last. He was for sure that his car would blow up and seize to exist if I put something other than Pennzoil in there. I asked him why that was and he was told that if you go switching brands your engine will die early. This guy would have sworn on his life about that.
Maybe if you use the wrong stuff or a terrible oil.
A lady came in and I recommended her to use some synthetic Pennzoil since she drove a lot. She though her engine would start leaking (this was a 14 edge with 50K on the clock.) She had been using Motorcraft (Which is a great oil but pricey since we have to get it off the shelf). I had to promise her that it would do no harm and would not leak.