Whos running a thicker oil?Why do people consider ACEA C3 and ILSAC oils to be the same? They both might be 5w30 but they’re very different.
I will never understand the thickies who feel they need thicker oil to go get a jug of milk. Your engine is still going to last 200k+ with the original grade while the rest of the vehicle is rusting out all around it.