I just couldn't resist the temptation. I was at Advance Auto today and they had Mobil 1, all viscosities, at 4.28/qt. That's fifty cents less per qt. than Wally World. I've got enough Havoline 5w-20 for one more change which is coming up next week (car will have 5,000 miles) and now I guess I'll switch to M1 0w-20 at 10,000 miles and have it in for the winter months (and my next track even in October). Perfect . The el cheapo in me will most likely switch back to Havoline dino next spring and summer though .