Alright, I've been running Castrol Syntec full synthetic 10w-40 in my 1006 CR250 for about two years with no problems, so I put the same in my girlfriend's new 2002 XR100. The guys on the XR forum tell me that it will destroy the clutch, which I can understand, but wanted to make sure this was a valid concern, and see it the same holds true for my CR. If so, should I run a regular "dino" motor oil or do I need to always use Honda oil? I switched to synthetic in the CR because I drain it after every ride, and it is always a really deep grey aluminum color and not see through at all. If I do need to switch, will it be alright to do so after running synthetic for so long in the CR? Thanks guys!!!
-AR
-AR