Today I drianed the M1 0W40 and got a sample to send off to Blackstone Labs. Then it got a fresh K&N oil filter, a Fram sure drain, and 6 quarts of Amsoil 5W30 ASL. My intentions are to change the filter and get a sample at 5000 miles then push it on out to 10,000 miles or one year which ever come first. The scary part is that I managed to put 5700 miles on the Jeep in just over 2 months. Normaly we might drive 1000 miles a month. I hope this doesn't hurt anything. Guess the 5000 mile sample will let me know if it's doing ok.