A lot of my riding mates have started using this Penrite oil in their big sports bikes ,so I am trying it Penrite 10 tenths racing 15 POA ester full synthetic 15/50 API ,/SN/CF,ACCA,A3/B3 shear free full zinc+ Ok for wet clutches and turbo charged and supercharged engines and light diesels as well ,I have always been of the opinion that any quality oil is satisfactory ,and regular changes enhance the performance, I change my oil and filter at 8,000klms (5,000 miles) cheap insurance I reckon.