. . . the dreaded oil thread, but has anyone tried a synthetic oil in their DCT, and if so, did it cause the clutch(es) to slip?
+1.Synthetic or regular - if it meets grade and spec, it meets grade and spec and will work fine. Always. If you are looking at a synthetic that has the appropriate weight, grade and spec - it will be fine.
Anyone who says otherwise needs a remedial chemistry class - followed by a dose of Logic 101.
Engine, trans and clutch oil is all shared in the same sump/case. It is a wet clutch with no seperate reservoir. The amount the clutch gets is based upon the oil pump to push oil through the small tubing to disperse it there.Clutch performance is not related to choice in engine oil, far as I know the clutch operates on its own fluid reservoir. Sounds like you should take it to your dealer to look at if it's doing what you say, 5300 miles on my DCT with no abnormal indications of any kind.