I dont know if this is common knowledge or not. 
Chatting to my mate Lyndon, (who owns 'Grizzly's' custom bike shop in Folkestone), about engine oil and whether Harley 20/50 would be OK in the GS,
I asked him what he ran his Harley on, 25/60, says he
.... I have not seen this grade before, it is a revlon or revtech oil.
What is my fellow
opinion on running the GS on 25/60, might stop a few rattles, be a bit too thick for the winter though 

Chatting to my mate Lyndon, (who owns 'Grizzly's' custom bike shop in Folkestone), about engine oil and whether Harley 20/50 would be OK in the GS,
I asked him what he ran his Harley on, 25/60, says he
What is my fellow
opinion on running the GS on 25/60, might stop a few rattles, be a bit too thick for the winter though
