Would it be ok to run Castrol Syntec 10w30 in my Vinson 500 Auto

 

someone told me not to run synthetic oil in my manual because it would mess up my clutches but i dont know if it would be the same with the auto.

 

Its not the synthetic oil that screws up clutches. Its the additive called moly.
As long as the oil has no moly in it, and the correct viscosity, its good to use. This leaves out almost all modern auto oils.
If the container has the energy conserving star burst symbol on it, it has moly and it should be avoided.


Even the auto vinson has a wet clutch.


Your best bet is to use a motorcycle specfic oil, that says on the container, that its safe for wet clutches. Valvoline makes a good atv oil, and amsoil makes a very good synthetic oil for motorcycles. Those are just two of the many good choices out there...but dont use modern automobile oil.

 

It's not synthetic oil that is bad for your clutch it's the friction modifiers mainly molybdenum in energy conserving oils. In the API label on your oil bottle if it states "ENERGY CONSERVING" it's best not to use this oil in a wet clutch vehicle i.e. manual. With a CVT system energy conserving oil is not a factor. I would not recommend using it though because energy conserving oils are relatively light weight oil 5-20 etc. I run 15-50 full synthetic oil in all my off road vehicles for maximum protection, but I live in a very hot climate.

If you want to run Syntec I would recommend a heavier weight, 10-40 at least.

 

All the Yamaha, and Suzuki made motors with cvt tranny have wet clutches, so the moly issue is a factor for them.