Mobil 1 in EVERY vehical I own. I worked at a place that had free oil sampling and Mobil 1 was going 12,000 miles between changes and still had some life in it but CHANGE your filter Every 3000 miles REGARDLESS of what oil/oil filter you use. Pennzoil is Ok if you don't mind candle wax in your engine.
the 12,000 + miles on an oil change was my Vortech supercharged 3.8L in my thunderbird and I DON'T baby it.
