I use "Castrol Power RS R4 4T with Trizone Technology is a fully synthetic 4–stroke engine oil for high performance bikes. Its Race Proven Technology based on Castrol's extensive history and testing experience ensures optimum engine performance to help provide increased acceleration under the most arduous riding conditions.
Features:
- Fully–synthetic 4–stroke motorcycle engine oil
- Unique anti–friction, low viscosity formula
- SAE 5W–40
- Exceeds API SL, JASO MA2"
This is the only oil I have been able to find that meets all the requirements, as stated in Spyder owner's manual. Hopefully, there are others but I have not been able to find them.