Oilman recommends:

10w-50 as being a good viscosity for cossie engines and 15w-50 as an option but not so good for cold start protection in winter.

As I've stated before, sae 60 is really too thick.

Have a look at tech data here: http://www.opieoils.co.uk/lubricants.htm

Where's the oil thread?

Simon

Oh no not another oil thread