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Oil filter sizing
Posted 25 January 2012 - 05:42 PM
Specifically, I'm looking to determine what a longer filter would be for a Purolator #PL10241.
Posted 25 January 2012 - 05:55 PM
Then you have differences in bypass valve construction, anti-drain-back vs. none, and other metrics that size and thread alone will not tell you.
Too frequent on the oil changes will result in the slight alkalinity of brand new oil causing etching of bearing surfaces. New oil is alkaline to offset the acidic nature of blow-by gasses.
This is all carefully engineered and you can cause serious problems by doing arm-chair engineering of lubrication systems with rule-of-thumb guessing games and myths about filtration, etc. Better to just leave it alone - OEM filters from Subaru are inexpensive and provide excellent and correct filtration. If you want more oil capacity consider a full-flow oil cooler. That will increase capacity and cooler oil lasts longer. Cool oil and full synthetic with 5k changes will do more for your engine than anything else you can do lubrication system wise.
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