I agree, the biggest difference I ever noticed with synthetic was with my Triumph Spitfire back in the 70's & 80's. When it was 10 below zero, with Mobil 1 it cranked much easier and started without knocking for the first minute or so. Credit the ability of synthetic oil to flow easier when cold. Made the difference between go and no go. Now I used it in my 1.8 5v Jetta for the sake of the turbo, but feel it's overkill with the bikes and van since the oil gets changed regularly and they're not heavily stressed.