I have a 1999-502 MPI engine with a upside down oil filter, what oil filter have a anti-drainback valve.

Most good filters. Stay away from Fram - rubber cheap check. If you look at the materials versus a Wix or NAPA filter you'd be amazed!!

if you have the clearance, the AC Delco pf932 a;llows you to carry one extra quart of oil in the system.

Mobil 1 M1-302.

ONLY Fram. We have been using them for years with no issues. Compare the Fram to Wix. The Fram is a high burst pressure, high volume filter. I wouldn't run a Wix if they gave them out free. HP 4

You guys ain't making this easy.

50 years experience here. Sorry, just trying to help through what we have seen. Take a compare the to filters. Look at the size of the inlet holes in both, the construction of cartridge, element, ect. It will speak for it's self.

Any idea who makes the Merc oil filters?

I think you may have this backwards...honestly. Not looking to start anything, but there is a cut way of both filters showing the internals, listing the flows and the pressures. Wix is much better constructed than Fram. I'm talking about the big filters though. I think they are equal to the HP6 Fram, which I have had several issues with.

To each his own I guess:

http://www.wixfilters.com/productinformation/index.html

http://www.fram.com/products/oilFilters.php

http://www.greenmediaonline.com/uplo...lk/0610_st.asp

Here is a thread from a Camaro site. The pictures are identical to the cut away I have seen. There is no way that you can dispute that the construction of the WIX is far superior to the Fram.

Evidently we aren't the only ones in disagreement!!


http://www.nastyz28.com/forum/showthread.php?t=745