Which will split down the exact same lines as every oil thread;
Group A want to follow the manual.
Group 2 want the best for their darling precious and believe evil Mr. Honda is trying to poison it, believing instead that Castrol Super Duckhams GTR is not only full of hyper synthetic block chain stabilizers, but has that new fresh minty smell with added zing and zip. 40 being bigger than 30 proves they are correct.
Group III bought or sold something labelled "Happy Dumpling Motorcycle Oil" and want to justify it either to avoid legal action or calm down the voices in thei