748 10w 40 Or 10w 50?

Few threads are always better informed than workshop manual

 

10-50w. The best is Motul but it is mega expensive, It's worth it though.

 

Interesting. The last stuff I bought was Motul 300V, 10-40. When I picked up my bike from MR at the weekend they flogged me Motul 300V 10-50. As you say it aint cheap. What's the difference?

 

ambient temperature it operates in

 

Cheers, thought so. Couldn't be arsed looking it up. But I would have thought 10-50 was middle east spec? Its the only place I've been touching 50 deg. Oh, and Niger but not much motorsport going on there...

 

if your kicking the shit out of it it might be worth using 10/50, someone might be able to confirm.

 

10/50 it is then. Tee heee....

 

Always used Motul 300v 15/50 myself.
Steve

 

My 916 is off the road as it has done in its valve stem seals and valve guides on the rear pot which runs very hot. I was told that the 10W40 300V I was using was not up to the job on a 916 and may well have been contributory to the failure and I needed to use 10W50 or 15W50 300V. The heads are hopefully going away next week to get sorted so would like to see the consensus on this question.

 

^^^ That is one theory that has been bandied about for a while now. Personally I would say there is an element of truth, if no more, in it.

 

the ducati workshops i know all use 15/50 fully synth in big engined bikes
some of smaller air-cooled engines (803cc down) are happier running 10/40 semi synth for general use. but if the bike is ridden very hard then 15/50 is still recommended for these smaller engined

 

10W50. It'll probably be behaving like a 10w40 after 500 hundred miles anyway.

 

Or rather 15W50. 300V.