The engine oil on a harley does not lube the transmission or primary it only lubes the engine. There is no need to run the modifiers mobile 1 is talking about in the post above. If you ride a metric where the engine oil oils every thing it might be a good idea. but we ride harleys. Any good engine oil you want to run will be fine synthetic or dino oil.

 

thanks for the reply's. I think i will give the 15-50 a try.