So I changed the oil today, like I have done 7 times prior. Usually after I ride the bike it takes a few minutes until I can see the oil in the sight window. Well after my ride today I come back, put the bike up on stands and I immediately see oil in the window. Odd, so I start the bike up and the oil is not flowing into the motor like it usually does. Usually there will be no oil in the sight window after the bike it started. But now it barely takes any of the oil from the window. I also had trouble starting the bike... it would crank, but when it finally started the idle was super low and it wanted to die. Once it warmed up it was fine.
The only thing different is I went from Motul 15w50 semi synthetic to Silkolene 20w50 semi synthetic. If nothing else I might just change the oil again to the Motul.
Why is this oil acting different? Thw weight difference isn't much at all... but this silkolene oil seems thinner than the motul, which would make sense as to why it was flowing faster. Any ideas?