Jeff" there all good nowadays , we ran to France on triples, i was on cheapo 5 bucks a litre semi- ,] and my Edinburgh friend on Fully synthetic,[ halfrauds] .
We did 1800 miles . i used 5 litres of 2T, he used 3 litres. half way to France , he pulled his top end off ,as there was a rattle .
Turned out his Rings were gummed in, And he took them off when home , and were gummed in again, .
This prompted me to inspect mine ,,the pistons and bores are as clean as a whistle, ,
So " its not just quality of oil , its settup, = jetting -air screws etc, , Hes ditched the Fully synthetic now, But i think it was running too rich & not hot enuff,