You can't tell some young guys anything!

Geez. I can't tell you how ANNOYING it is to be told the the filter I'm buying is for a gasoline powered BMW but the oil is for a diesel... My old M3 called out for 15w40. It's a very common weight for diesels so I often (always) ran "diesel" oil. I put ~80k miles on that car and never had an engine issue. And it saw the redline every time I drove it. It had over 220k miles on it when sold to my cousin. Ran just great for him also.