I have about 100 mile round trip commute everyday in stop and go traffic traveeling from york county pa to Baltimore, Maryland. I also work a part time job in the city so do some city driving during evening rush hour. I posted my last oil analysis on 5/31/2007 here on BITOG with a run of Motul e-tech lite ester based oil 0w30 for 12,200 miles. Blackstone suggested to go another 1500 miles. I thought was being conservative with neo cutting their recommendation in half lol. I have followed some of your previous posts and feel a kindred ester spirit with you.,