Since my first posting, I talked to the service manager at the Ford dealer. He read from the shop manual that the '99 Expy's take 6.5 quarts when changing the filter. (Why would you NOT change the filter!?). They've moved the filter on the '99's. It comes right off the block. I've also sent an email to the Ford engineers via <a href="http://www.ownerconnection.com/home">http://www.ownerconnection.com/home</a> and got the response that 6 quarts is what the engine holds. Kinda conflicts with the dealer except the dealer couldn't have been more responsive to my problem. (Yes, I'm talking about a Ford dealer!) At any rate, so long as I don't start leaking, I going to use 6.5 quarts on a change.