2024 Ram 3500, 6.4l Hemi. I was using the Royal Purple #20-500, which was a larger size can & element. Unfortunately, the First Brands bankruptcy has taken out multiple filter brands, including Fram and R.P. I started looking into Wix filters because I've used them on other vehicles with good results, but what I found was surprising. Like many, I use full synthetic oils and believe in changing oil around 5,000 miles. Like other filter brands, Wix makes a standard (cellulose) element, and a performance (composite) element, the XP. Filter # 57502 or 57502XP cross-refer to the R.P. #20-500. But the standard Wix performs better, stripping out 99% of 23 micron particles. Reading carefully, the XP filters are designed for longer oil change intervals, not necessarily higher performance. So I'm going for the standard Wix 57502, have one on order to compare to my sole remaining R.P. #20-500 before I use it. Too bad so many good oil filter manufacturers were taken out with this over-leveraged private equity disaster.
Here are some comparative results from a Ford discussion board;
Wix 51372 / NAPA Gold 1372:
Beta Ratio: 2/20 = 12/25 (Wix Data)
What the Beta Ratio means is listed below
(um = micron, 1 millionth of a meter). * a human hair thickness is ~ 70 microns *
2/20 = 12/25 means:
1 in 2 particles will get past filter media (50% filtration efficiency) at 12um
1 in 20 particles will get past filter media (95% filtration efficiency) at 25um
50% @ 12um; 95% @ 25um; 99% @ 23um (NAPA Gold Data shows a bit better performance, again Wix and NAPA Gold are the same filters)
11 to 13 GPM flow (Wix Data)
Wix 51372XP / NAPA Platinum 41372:
Beta Ratio: ?
62% @ 20um (Oreilly’s Data); 88% @ 35um (Oreilly’s Data);
11 to 13 GPM flow (Wix Data) *Same flow rate data as the better filtering regular Wix / NAPA Gold.
I would of expected the Wix XP / NAPA Platinum flow to be better....But no.
Oil & Lubrication - Wix vs Wix XP (Actual Test Data) - I've been researching oil filters and thought I'd share my findings to hopefully help others out. Here are some actual performance numbers (not just vague marketing claims) for anyone interested. *The following numbers are for the Wix 51372...
www.ford-trucks.com
For what it's worth ! Probably take a few years for manufacturing to re-establish itself, it's not like oil filter demand is fading away anytime soon......