Well, there's no evidence there is there?
.
And just because you say it twice doesn't make it true , does it?
Whats in these 'motorcycle oils' that make them any better than SL spec 10/40?? We should be told!
Reading the Silkolene site and it tells me that they developed "special high shear polymers" to improve
on the basic mineral oil of the 1960s.
It doesn't say "This is better than a standard modern SL multigrade from the year 2011" . Don't you think it would say that if it were true??
They talk a lot about the perils of using inferior oil but its all based on fear, not data.
They tell a story about how Joe ruined his race engine using cheap oil but they don't publish any shear degredation data.
Don't you think they would plaster that data all over the can if it was significant and true ?.
I bet Joe's toilet smells cos he doesn't use Harpic too.