I was at Pep Boys tonight, looking to pick up a Purolator oil filter for the Tbird and a buddy's Mach 1 mustang. Usually I'll use the Motorcraft Fl-820s, but with the Purolator rebate I just decided to pick up a pair of classics. I forget the Puro equivalent to the 820s...but there was another choice! It was a purolator L22500. It was taller, but not as fat as a 820s. Are these ok to use on our 4.6Ls? I have never seen a different size filter for the Ford 4.6 and 5.4Ls. This particular filter was appealing to me because it seems like it would be easier to get on and off my Tbird than the 820s. Anyone running these on a 4.6? This is off topic but I also scored 10 quarts of Kendall 5w30 syn blend for a buck a piece! I love clearance motor oil!