Me and some friends were sitting around discussing different types of oil. As everyone that rides motorcycles do. And we all came to the same conclusion about Honda brand oil and Harley brand oil. Since neither company have their own oil refinery,(as for as we know),they must have to buy their oil from someone else. We determined that company was whoever sold it to them at the lowest price, low bid. I'm sure there is a lot of room here for us to be wrong and someone here could give me the facts I could share with the fellas.