I have always been led to believe that clutch slip indused by the use of synthetic oil is not actually the oil being at fault but it showing the signs of a worn set of plates much earlier than a mineral oil does.
Also I was under the impression that older engines, such as the Indian Enfield Bullet, are unable to use the more modern synthetics due to their reliance on the scuffing that is needed in the bore. The synthetics are too slippery for the scraper ring to cope with and you end up with a glazed bore and very smokey exhaust.
|