Oil question

[cain3d]

What’s the difference between part synthetic or full. The manual says it can use both and the part is more expensive than full. Any real differences? T.I.A

Part:
https://www.supercheapauto.com.au/p/castrol-castrol-power1-4t-motorcycle-oil-10w-40-4-litre/4430.html?cgid=SCA0107100102&vid=SfBKp0jvg1OAL0rB5D01Kg%3D%3D#prefn1=srgBrand&prefv1=Castrol&srule=Best%20Sellers&sz=60&vid=SfBKp0jvg1OAL0rB5D01Kg%3D%3D&start=3

Full:
https://www.supercheapauto.com.au/p/castrol-castrol-power1-racing-4t-motorcycle-oil-10w-40-4-litre/591961.html?cgid=SCA0107100102&vid=SfBKp0jvg1OAL0rB5D01Kg%3D%3D#prefn1=srgBrand&prefv1=Castrol&srule=Best%20Sellers&sz=60&vid=SfBKp0jvg1OAL0rB5D01Kg%3D%3D&start=5

[tridentmania]

I would use the least expensive as they are all good. I have always used fully synthetic, no problems with any vehicle in hundreds of thousands of miles over the years.   

[Seahorse72]

I just purchased a new 660. Dealer said the oil in the bike is Castrol 10W40 full synthetic. I’m taking the bike to the dealer for the 600 mile service. I’ll do the oil and filter changes after that. I’m surprised the oil/filter change interval is so long. I don’t feel comfortable going past 3000 or 4000 miles. It’s cheap insurance.