You speak of the need for a good high quality oil filter, but you don’t provide any specific guidance... and, in my experience, there’s a lot of variability in oil filters these days (much more variability than for oil, other than the new oils which are being labeled “extended service/miles”).
Is a “good quality” oil filter the pricey Mobil 1 and K&N Filters and their ilk? (The one’s with 99%+ multi-pass ratings/extended service ratings, and high prices to match??) Or the upgraded Fram’s of the world (Tough Guard/Extra Guard/Extended Guard)?, or Purolator Pure One, etc. (less expensive, but with excellent multi-pass ratings?) Or will any oil filter with a 96% first pass rating meet your criteria for “good quality”? (the base Frams, Purolators, etc.)
And which is the better rating to use if one adheres to your (still-squeamish?) advice for extended oil change intervals? First pass, or multi-pass efficiency ratings?? (I would think multi-pass is more important for extended oil change intervals than single pass, but not all filters provide multi-pass ratings!). And finally, what about “high mileage” oil filters? (Fram HM’s, etc., the ones with "stuff" in the middle of them?)
Thanks. Jim
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