Wandering slightly (a lot) off topic, the oil centrifuges always seemed like a good idea - UK Defender has them fitted, not sure if it's supplements main filter or not.

US trucks have them too, again not sure if that's their only filtration or in addition to help extend oil change intervals.

https://www.youtube.com/watch?v=T501wnNVr70

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David


1996 Mercedes S124 E300TD - 129k - rolling restoration project -

1998 Mercedes W210 300TD - 118k (assimilated into above vehicle)