mobil 1 and wet clutches

[OB_notraction]

according to mobils tech dept, they would rather we use their 4T 15w50 full synthetic bike oil,theory is that the mobil 1 range has friction modifiers which might cause 'wet' clutches to slip ! unusal though ,I ran it in my zx11 for 4-5 years and no problems even with many hard launches,was I lucky? But if they are correct and since now I prefer to use a '40' oil then Shell has 'Advance Ultra 4' which,is a 10w40 (as the owners book recommends) which is also fully synthetic and ok with wet clutches.

 

[OB_Earl]

Mobil changed their formulation during the last year to meet the new sj standards. The old Mobile syn was fine, I just think the new sj is not the hot setup for starters and wet clutches. I would stay with a motorcycle specific oil these days.