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I mean changing the filter. Unless you drive around with no oil cap on, what do you think is contaminating the oil to the degree that filter capacity is used up?
I have a Chrysler Owner's Manual that actually recommends changing the filter every OTHER oil change... and why not? I've never in almost 40 years of changing oil come across a filter that was anywhere near plugged up or compromised from sediment or sludge or whatever. And on all except the most abused equipment, there isn't much for sediments in the drain pan either.
What is a crappy filter anyway? Heck, I have quite a few engines that have no filter at all. The new '55 Chevy small-block V8 even came with no filter. Not saying having no filter is a good thing; just saying it isn't as critical as recreational oil changers make it out to be.
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