bonester wrote:Next time the motul guy is around, ask him what the differences are between car oils and bike oils, and why the large difference in price (apart from profiteering by oil companies) and see how much he knows.

A few years ago I asked a Castrol rep this question
and the answer?
car oils are for cars and bike oils are for bikes
the difference..?
bike oils have extra stuff in them to cope with wet clutches
and extra stuff to let your gear box live (EP additives etc etc)
which is why a bike oil is dearer than an equivalent car oil
Car oils do not have these extra chemicals/polymers/additives
and also, a lot of car oils have friction modifiers which don't let
your bike's wet clutch do its jobs..coz the oil is too slippery
another reason not to use a car oil in a bike
hth
cheers