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  1. O

    Collect used purolators at Pep Boys

    And cut them open. Someone ought to do this, maybe? Then compile the % of torn filters. I thought about doing it myself but lack cutting tools.
  2. O

    Why are Prius cartridge filters pricey?

    One question leads to another question. :-) Scanning through my options on amazon I see these cartridge filters recommended for my new Prius: $7 Purolator classic (approximately) $21 Mobil 1 $23 Amsoil EaO The spin-on equivalents for my Honda I4 are $3.50, $11, and $15..... about 50-60% as...
  3. O

    Why did Amsoil efficiency drop?

    They used to advertise 98.7% at 15 microns (and 99.8 at 20). Now it's XXX % at 15 (unknown) and 98.7% at 20. Did they redesign the filter to capture less stuff?
  4. O

    Any advantage to run oversize filter?

    Fram XG6707 is recommended for my Honda I4 but the slightly longer XG7317 also fits. Any disadvantages to running the longer one? Better filtering? More pumping & fuel consumption? Etc? Thank you ;-)
  5. O

    Replacement filter for PureOne?

    I registered just to ask this one question. I saw the photos of torn PureOnes and thought maybe it was time for change. These are the filters amazon recommends for my Honda I4: I'm leaning to the top one as it has best efficiency at 20 microns: 99 Mann 98.7 Amsoil 98 Fram ultra ?? Fram tough...
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