oil with friction modifiers

[Dcock]

So i used this oil that my dad had left over from his car.. it was motaquip high performance 5w40 fully synthetic oil and i put it in my bike. I'm not sure if i'm being paranoid but i think i can feel the clutch slipping at high revs. I have only had the bike for a few weeks so i'm not 100% certain. Anyway i had a google and heard that if the oil has "energy conserving" on it it would most likely have these friction modifiers in the oil that could cause a wet clutch to slip on a motorcycle. I couldn't see energy conserving on the oil container but it does say fuel efficient and also that it reduces internal friction (surely that's what all oil do though)... but does that imply friction modifiers?

Also i'm probably going to change the oil anyway, but does this mean i'm going to have to change the clutch? Or shall i just simply replace the oil?

Thanks for any advice.

Dan.

[Fazerider]

Typical oil company secrecy means you have to resort to the MSDS sheet to get a clue as to what they've put in their product. It doesn't list molybdenum disulphide as a constituent, which is the usual trouble-maker for wet clutches... however, other additives such as calcium sulphonate may cause similar problems in high concentrations, and they don't list the proportions.
If the slippage only appeared after you'd put the stuff in there, then that does point the finger at the oil. On the other hand, if you only started looking for the problem as a result of belated concerns about its suitability, then it may well just be tired clutch springs. The OE springs are a bit marginal and do weaken with age. New ones aren't too expensive and they are easy to replace.

[darrsi]

Stick with 10w/40 semi synthetic when you change it as well.