Letter Re: Advice on Engine Oil for Motorcycles
Jim: Regarding the letter on motorcycle engine oils, you are correct about most motorcycles using a wet clutch and the need for extra additives in the oil, but there are a couple of other issues of importance. First off, cars use a separate oil supply for engine and gearbox, which allows the oil manufacturer to customize oils for each application. Motorcycle engines on the other hand usually use a common supply for both, which means that motorcycle oils need the additives in them for both engine and gearbox applications. The problem is that being in an engine destroys the additives …