Quote:
Originally Posted by Frank Lee
That changing the oil filter twice as often as the oil seems bass-ackwards to me. For one thing, I even have an owner's manual that specifies changing the filter every other oil change! For another, really, what do you think you're draining out? Is there so much gook in there that the filter media is at capacity??? I doubt it! What is the nature and source of all this gook? Hell, my old V-dubs didn't even have filters!
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All oil filters have a bypass valve. This valve allows unfiltered oil to be recirculated thru the engine. The valve opens on an as needed basis. If your oil filter is dirty, it is needed more often. Your old V-dub, being air cooled didn't have the tight tolerances of today's water cooled engines. Therefore the larger particles of crud just flowed right thru. I love the old bugs, but if they had really been that good, they could have been cleaned up to pass US emissions standards.