Any one use: Castrol Power RS R4 4T

[StromRider]

I just put some "Castrol Power RS R4 4T 5w-40" in my Wee-Strom 650
and it seems to work well. I like he clutch feel and shifting
better than the amsoil 10w-40 that was in it before. Does any one
here have any experience with it?

 

[ccdhowell]

I've used the older R4 Superbike 5w40 with nice results in my ATVs. I also think the shift quality is nice with this oil and it seems to hold up nicely in quads that are pushed pretty hard.

 

[sunruh]

i've tested Castrol GPS 20w50, but not the RS R4 4T 5w40.

 

[harley145000]

i have used 20w50 castrol 4t in my 04 flh without issues,lot cheaper than harley dino.