I have used Mobil 1 for 85,000 miles, 5000 m change intervals. Generally surprised by how good the oil looked. I drove a lot in Texas, and I enjoy working on the car, but I would rather drive it. BTW, It has 100K miles, runs like a top, and will continue to do so for another 100 before have to do the water pump, timing belt and seals again (if I keep it). :bowdown: