[I]It is officially listed in Caltex product ( SAE 20w 50 motor oil ) datasheet that this oil should not be used in any type of motorcyle engine (link pasted below ). Dont know why it is so hard to convince people that Car engine oil cannot be used in Motorcyle engines , wet clutch type transmission.
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One typical reply from Oil dealers you get is " Oil tou Oil hota hay, Gari ka ho ya motorcycle ka " ..........
http://www.cyl.com.my/productsheetfiles/129847348783438584havoline-motor-oil-sae-20w50-sg.pdf
Havoline? Motor Oil SAE 20W-50
Applications
? Passenger car and light truck gasoline engines where oils of up to API SG
performance are required.
? Industrial and marine applications of passenger car type gasoline engines where oils
of up to API SG performance are required.
Not recommended for use in gasoline engines that require API SH or higher
performance or ACEA-classified oils, or in any gas-fuelled (CNG or LPG) engines, in
any diesel engines or in any motorcycle engines. API SG performance oils are
intended for use in vehicles manufactured before 1994.