Ditto. Castrol GTX 10-40 in all my cars for the last 35 years. I used to buy it by the case (1 qt. x 24) now you can get it in a 5 qt. jug at WalMart. Very convenient. IMHO, If you keep close to the 3000 mile oil change interval on any car it doesn't make any difference what kind of (name brand) motor oil you use.kdkrone wrote:I have been using Castrol for years in my 92 Q.