Amsoil SS 0w-20 5,000mi OCI ‘21 Subaru Crosstrek 40,000 miles
- Thread starter HondaFarm
- Start date
10K on an air filter seems premature for changing. I would look into using a better filter. I’d install a filter minder. Or make sure it’s installed correctly.
Some aftermarket air filters have fitment issues on Subarus. Use an OEM Denso filter and leave it in for 30k miles. Given the low wear metals, I doubt you have a filtration issue though.
The only wear metal of concern is tin, but I've seen more than one example of high tin on SpeedDiagnostix reports when it reads low on Blackstone or OAI reports of the same sample.
The only wear metal of concern is tin, but I've seen more than one example of high tin on SpeedDiagnostix reports when it reads low on Blackstone or OAI reports of the same sample.
BTW, if you're using the PBL14615 that Purolator recommends for these engines, I'd switch to the taller 14610, which has a lot more filter media. I'm not sure why they recommend the smaller filter. I believe the OEM filter is about the same dimensions as the 14610.
That was the first thing I did after I saw the report. Pulled the car in the garage and gave the air filter housing a once-over and checked for installation security and tightness. I installed a MicroGard air filter (green one). Will switch over to the Wix filter that performs very well in filtering tests. Thanks for the heads-up
The 14610 has a lower bypass setting, but it also has around 40% more filter media, so there will be less pressure dropped across the media, which will mostly compensate for the lower bypass setting. The 14610 is actually less likely to bypass since it's less likely to clog due to its higher holding capacity.
I measured a cracking pressure of 29 psi for the bypass valve on a PL14615. If the filter clogs, it could drop over 30 psi, and IMO this isn't all that safe for the engine. Even Subaru's 23 psi is higher than necessary for the FB25, which doesn't have a very high oil flow rate for a Subaru.
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