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Complete oil drainage???
JAG, in looking at the drain valve, it appears that the threads are higher than the bottom of the oil pan, which would create a situation whereby the last bit of oil never gets drained. This is why we are told not to use oil suckers like boats and cars use to change oil, because it may not get it all out, leaving sludge and metal particles in the oil pan.
My perception may be incorrect about the quick-drain valves, any comments?
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