well the 5W-40 took it up to 16-17psi. That puts it in the realm of possibly gauge/sensor error being a factor. I'll get a mechanical gauge onto it to confirm idle pressure. If it is sub 20psi then I really don't know what to do ie whether its worth still throwing the TFSI turbo and exhaust at it and getting a year out of it OR doing the bottom end on the other motor right now.
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