Mark,
We also tell our pre '05 customers to get their "FREE" oil service every 15k (after all free is good)
As for 15W50 not being in production, the Beaumont,TX. plant was damaged in Katrina (the only plant putting 15W50 in quarts)
We buy on the average four 55 gallon drums a month. So they are not discontinuing the 15/50, although they upped the price and added the retarded "extended preformance/15,000mi." crap
Thanks, Greg

http://www.mobil1.com/USA-English/MotorOil/Oils/Mobil_1_Extended_Performance_15W-50.aspx

__________________
Greg Maxwell, President
Munchen Motors Inc.
Bosch Service Center, Est. 1987