Just a note of success: My '02 320 wagon, 98K miles was using approx. 1 qt. oil every 1500 miles. I posted here, and got some "don't stress it" replies. At my next oil change, I put in Amsoil European formula synthetic oil. Now, 4,000 miles later, I haven't used a drop. Good stuff- I'll be getting their trans. oil for my Jetta, and already put their scooter oil in both our Honda Metro's.