Ray, I agree it's often 4qts plus the filter on some OEM pans, but I'm thinking mine is OEM 5qts, and believe that 4 qts is not going to get to the top of the back sump to fill into the little front sump. If that's the case then drain down oil is going to fill the front sump, creating low level in the back. I've got a message in to Scott Sehr to see if he can help me get over this dilemma. I'm thinking that this is the pan I've got, but thinking mine came from a local supplier in Sioux Falls vs Summit - http://www.summitracing.com/parts/su...view/make/ford