Mixing Rotella T4 and T6

[jeff78]

I'm in Canada and temperature is about 15c, I have a water cooled wet sump Kawasaki 800, I put in Rotella T4 15w40, I'm always concerned about start up engine wear, should I be using T6 5w40?

Of the many things I spend time thinking about in regards to maintaining and riding motorcycles, startup wear falls exactly nowhere on the list. But that's just me.
Put it another way - I'd bet money that most of the wear on still-running high mileage engines is not due to startup wear.
It's a motorcycle - things wear out if you ride it enough.

If you really believe a lower W grade reduces startup wear, why not run a 0W-40?

 

[Degreaser]

I did the oil mix, i mixed the Rotella T6 5w40 with Rotella T4 15w40 50/50 mix and went for a test ride, the bike ran great and shifting was good too

 

[Bonz]

I did the oil mix, i mixed the Rotella T6 5w40 with Rotella T4 15w40 50/50 mix and went for a test ride, the bike ran great and shifting was good too

As it should, were you thinking it might not feel good? They are good oils that will take care of your engine well.