Is there any conclusive evidence that Nano Drive reduces cam follower wear? I'm torn between switching to that, or Silkolene Pro S.
I do know that the latter is great for wear (as most Ester oils are) as I used it exclusively in my old VR6 turbo from 0 miles to 70K miles (forged piston rebuild). When the engine was stripped down after a piston bought it, the wear on the piston skirts, bores, valve stems and guides was virtually nil, so I reckon it will be good for reducing TFSI follower wear, especially with uprated HPFPs exerting more pressure on it.
FWIW, the oil VW specify is based on bearing clearances, pumping losses and long service life (i.e. reduced shearing and enhanced pollutant retention) on a factory fresh engine. The brand is irrelevant. VW just put the specifications out to tender and draw up a mutual back scratching contract.
As our engines put on the miles and wear out, moving from 5W-30 to 5W-40 is not such a bad idea though.
