Here are  Harley Compatible plus Genuine products for servicing your your Harley Davidson motorcycle . 
 Custom Cruisers recomend and  use Torco US Made top quality oils as many drag racers have found they do not break down like conventional oils if you use synthetic- or lose their viscosity under extreme heat with no black sludge problems- ending your engine life !havoing had a cheaper  brand in  plus degrees break down blowing the big ends on my bike-and getting recovered from Austria plus huge expense of motor rebuild of a SPUTHE  motor -  NEVER again will i use anything else Mike