I have always used Castrol Power One, 10/40, 4 litres, but thats £38, where as the Halfords Semi Synthetic 10/40, 5 litres is £28 or so.
I have heard various people say both good and bad things about Halfords oil, believe to be made by Comma? My friend uses it in his Exup, R1 and XR400 over the years without a hitch and swears by it. Perhaps im just a Castrol fan due to the brand and never swayed away from it as it's never done me wrong, but when you have four bikes it provides a good saving and comes in a handy 5 litre size and not 4.
Anyone hear have any thoughts about the Halfords motorcycle oil?
Cosy