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Oil filter revisited
Many moons ago it was discovered that the Purolator L30165 (and equivalents) was an oversized but direct fit replacement for the Purolator L14459 (and equivalents). The L30165 is indeed a direct fit and it does indeed have a larger surface area and filtering capacity. However, today I stumbled upon a large difference. While both filters have bypass valves, the L14459 has a bypass pressure of 12-15psi while the L30165 has a bypass pressure of 25-35psi!!!!!
The obvious concern is that the larger L30165 filter will not go into bypass and could become a large resistance to flow at high RPMs. The concern would obviously be greater as the filter gets filled up with particles over time.
Anyone want to add some thoughts or insights to this?
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Tony
1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads
2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil
2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil
1992 Red Ferrari 348 ts, 82,XXX, Redline everything
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