I run an LF9691 venturi combo on my powerstroke. It's larger than the stock but still has the same thread. Do not confuse that with an LF9691A which also has the same thread but is a bit wider so will not fit next to a powerstroke oil pan. I have 380,000 miles and I do 10,000 miles oil changes w/ UOAs and always get good results. I posted my last UOA results on the HDEO UOA forum with the results from a particle count I had done too. Blackstone said my oil was very clean. I don't like to go much past 10k because I notice the engine starts running a little rough after that many miles with the HEUI injectors. Like stated above, depends on how you use your truck and that kind of stuff for individual results. Another thing to note, the venturi combo filters do not have bypass valves built into them but my engine already has one on the filter head so that should get the job done anyway.