I just lucked out and bought 10 quarts of M1 on sale. My local Walmart had the 5 quart jugs on sale for $14.98. The only down side is that they only had one 10W30 and all the rest was 5W30. The 15W50 was full price $18.98. So I got one jug of 10W30 and reluctantly one jug of 5W30. Even though I did not want the 5W30 at that price I could not say no. If I had more extra cash I would have bought two years worth!!! So it looks like Redline will have to wait!