Im playing it safe
straight castrol GP50 in all the bikes with roller big ends and Duckhams Q in the Golden Flash and the Matchless G9. Unfortunately Im down to my last gallon can (ah, a proper, good old Imperial gallon in a tin can, remember those?
) of DQ after a mate cleared his garage out years ago and I ended up with a few cans.
I dare say once it's finally gone then it'll have to be something in 20/50 from Morris Oils or even Halfords
With regard to sludge etc. Ive split many engines over the years and never come across one that has been a runner that has worried me. If its a really neglected/dead one that going to be rebuilt, then it'll get a proper clean out anyway.
As for an expert, isn't an ex a has-been, and a spurt a drip under pressure?
I know, it's an old one. I'll get my coat.
Thanks for the welcome. TTFN.
Steve