| Not sure if you're having any of the same leaks, but some of these places are pretty common and should be checked. I changed the following: rear main seal
--was definitely leaking after probably far less than 60k miles oil filter tree
--first I tried replacing some of the accessible copper washers, but had no luck in fixing the leaks. So, I ended up replacing the oil tree, o-ring, and gasket with new ones, which unfortunately require an engine pull oil pan seal
--not sure if this was necessary, but did it anyway since the engine was already out replaced rubber lines from oil cooler to engine block
--also not sure if this was necessary, but the old ones were hard and dirty replaced 90 deg elbow between engine block and oil pressure sensor
--was definitely leaking, although you won't have this unless you also have larger aftermarket turbos like my Z1 675s tightened leaky clocking bolts that hold turbo intake and exhaust sections together tightened leaky oil drain flange bolts on bottom of turbos
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