Does not matter the oil blends... on average I dump the oil when the shift quality goes belly up. Not sloppy lever pulls; not a loose chain; more like 2,700 miles and it's time. Ask Grn. I think he was experiencing the same thing. I sure can tell something changed.
To your other point Hub, there are people that use auto oil in their bikes. I wouldn't ever do it, automotive oils have friction modifiers that damage friction plates as adding to clutch slip/wear issues. But people do it, I won't ever be one.
Your bike, Vic. I have junk science as my evidence. My cold compression numbers read higher than most warmed and tested: I'll bet. My clutch does not slip with the mixing. However, on average mind you, just those every so often low, robust rpm WOT's in 6th I can tell. This is the only time it was experienced was with fresh full syn. So I backed off, and miles later I had the urge again and it became a no show.
As for my bike, Vic, I use Delo [for diesel trucks] as the other 50% crankcase fill. I roll the bike backwards; down the driveway in 1st gear; creates super drag on the clutch plates. That's 15w40 mixed with straight 50w. After so many miles, the bike eventually begins to roll with less drag. Sound like shift quality going down hill?.. pun intended.
It's these new fancy oils with all there added chemistry that mess things up.
The additives in the 50w racing oil have separated and I do not shake the can up, I just pour. It's plain old bulk oil and if the industrial revolution just had plain oil keeping those machines running... couch-couch.
Walla, no shearing, ok for cold/dry starts and protection once heated up. I think that's what he was saying?
No, In layman's terms if we use 0w10, then left number is how thin and fast it flows when cold. Right number says it's at this range when warm. So if summer comes, the number runs up to 20w50. And if using straight 50w, it flows very thick and slow. So sheer happens either way with any weight. What I'm saying is distilled is still oil in bulk and if I think industrial revolution and how crude things were back then chemistry wise, oil is oil, bulk is bulk.
Tormenting the motorcycling community one post at a time