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      02-14-2021, 12:04 PM   #4
Bartledoo
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Drives: 2011 E90 M3 6MT
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Quote:
Originally Posted by Davisca455 View Post
People, including myself, suction the used oil out of the oil filter housing to remove whatever quantity of oil that is, and it made me wonder how much MORE used oil you could remove if there was a drain on the cooler?
I guess the simplest way to ask is:
Does anyone know how much oil is in the cooler and its piping?
Yea, I suction the oil filter housing as well. Just wasn't clear you meant using it as a third drain for oil changes. I already get about the same amount out as what I put back in for oil changes. So I probably wouldn't bother with another drain.
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