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I have prefilled all my oil filters, except on the 911 with a dry sump and a horizontal filter of course.
I have always run 20-50 in the 911, even in the cold months.
It is interesting that they found water on a non prefilled filter. I would have to guess that water is from the air in the filter, as air always has some moisture in it.
Interesting video. Lots of people will continue to be lazy and not prefill the filter. Not on my El Camino.
My wife's Macan has the oil filter cartridge up on the top, so no prefilling that.
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Glen
50 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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