A little while ago bikes could use car oils, due to the fact there was no bike oil, then came the new car oils and motorbike oils split away. I used to buy Havoline oil cause on this link http://www.datateck.com.au/lube/caltx_au/buttons/default.asp?section=4 i put my model and an oil came up, fairly inexpensive oil, on the package it had for light vehicles cars/vans and 4 stroke bikes. Now I put in my details and it doesnâ€™t offer it anymore. Maybe Havoline has finally made a motorbike oil to sell to us in half the quantity at twice the price. Is this motorbike Oil business just a rip off? I know about wet clutches etc and know about the anti friction stuff they put in car oils, but that stuff is in only a few oils eg magnatec ecoblend and most synthetic car oils, but most mineral car oils are still motorcycle specific, so why cant we use them?? is it just an oil company plan to rip us off???