I want to ask the differences between the JASO MA MA2 and MB oils.I have checked the JASO website but does not offer much information on this.Also why is it advised to not use JASO MB oil for motorcycles
According to oilspecification.org, it has to do with friction reducing components.
JASO introduced the MA and MB specification to distinguish between friction modified and non friction modified engine oils.
For motorcycles which share the oil with the engine, clutch and transmission, it is not a good idea to have advanced friction reduction additives that can cause slip. In those cases use the
Other configurations can use the
MB, which has the additives to make it the lowest friction rating.
Bottom line, use what the motorcycle manufacturer recommends.
For my vespa 125 cc I used castrol power 1 racing fully synthetic 10w-50 it is suitable for scooters we can put this type of oil for scooters are wat if we use wrong grade whether it will damage engine are wat. It is very high grade oil because in India temperature crosses around 45°cesius normally in summer so scooter oil losses it viscosity in extreme temperature. So I changed my grade to 10w-50 fully synthetic