I buy oil in gal jugs (Mobil Delvac 1300) at Sam's Club for $42.52 a case (includes tax). They also have Rotella and sometimes others for the Diesels.

Walmart (which is right next door to SAM's) has the Ford filters ffor the 7.3L at $9.95 each (plus tax).

I put a Fumoto valve on the drain pan and don't even get a drop of oil anywhere it shuldn't be plus I know that it's been done correctly.

I end up spending less than $55 to change the oil myself. I also pull a sample off and send to Blackstone Labs using the money I saved by doing it myself to pay for the Oil analysis ($25). Bottom line is I get the oil changed AND understand more about how the engine is "wearing" for about the same cost as the Delaer Oil change only.

Yes I do get coupons every so often from the Ford Dealership with "specials" but I like knwoing whose had their hands on one of the most ciritcal aspects of maintenance for a diesel.

D