Information for 4.6 owners. The shaft that the oil filter screws onto can come lose and cause a substantual oil leak. If this happens take the oil filter off and get a bolt that has a 1/2 inch head and is about 1 1/2 inch long and abot 1 inch of threads. Put nut on the threads all the way up. This can be used to tighten the oil filter shaft which has a large hex machined inside. This is on the peice that has the oil pressure sender, the oil filter and lower rad hose. Hope this helps someone.
