Originally Posted by Strat_928

I have had something similar on my 2015 Cayman S - started seeing oil after an oil change but intermittent, only leaked when sitting for days and days or cold weather - not a hot engine. At the next change it happened again and the next day I took it back to be checked - it turned out to be a crushed washer. Leaked a little (probably residual) the next day, and then stopped and has not returned. It never leaked often enough to change the level (we have a LOT of oil in there) but still concerning of course. Seems to have been a poorly tightened crush washer in my case.