Re: OT: Oversized Oil Filter on Cars

Posted by Jon Hagen on October 14, 2005 at 11:25:53 from (69.26.17.221):

In Reply to: Re: OT: Oversized Oil Filter on Cars posted by txgrn on October 14, 2005 at 06:17:35:

I agree,the larger filter IF it has more filter media is better for your engine. What many don't realize that the filter mesh micron size is so tight that it will filter all the engines needs only when the oil is hot and thin. When you start an engine with cold thick oil in the system,the filter cannot possibly flow the full volume needed by the engine,so the filter bypass valve opens allowing mostly unfiltered oil to circulate through the engine. As the oil warms and thins,more and more oil flows through the filter untill the bypass valve finally sees little enough pressure drop to close completly.

Consider that for the first 5 min or so your engine is running on mostly unfiltered oil. The more restrictive(smaller)the filter is, the worse the problem becomes.

Follow Ups:

• Re: OT: Oversized Oil Filter on Cars txgrn 15:30:08 10/16/05 (0)

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