Mobil 1 Mx4T synthetic motorcycle oil
#12
#13
Fram filters have weak, glued cardboard endcaps that leak unfiltered oil back into the system, especially under high pressure. Cut one open after you have used it and see. I've cut open three of them from my 3 vehicles after 3,000 miles of use, and one had the endcap completely separated and leaking and another had it leaking. The third was ok. They were three different filter sizes, too, so I fear the problem across their product line. That kind of quality goes nowhere near my engines. Most quality brands use metal endcaps that do not leak.
#14
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