I've heard this as well, but given most b.b. turbos have oil restrictors, I think most people get by without blowing oil through the seals. The same goes with routing it to the pan drain plug. I've read over and over it's not correct, however alot of people do it with no issues.Interesting. Any concerns that will impede the flow and hurt the turbo seals?
I've always heard 90s are a no no on the return line.
Any pictures from the back side of the motor with the turbo mounted?
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The oil restriction in my turbo is tiny compared to the drain hose.