Therapy
Member
For what it's worth I have only used Honda branded synthetic oil in my NC700Xs. The DCT is now at 11,500 miles. I use Honda HP4S 10w30 because I can and I want to. If it affects the DCT operation I haven't noticed. I'm not a oil elitist - my ST1300 has run Rotella synthetic 5w40 for about 70,000 of it's 160,000 miles and Rotella dino 15w40 for much of the rest. I stay with Honda HPS4 in the 700 because the NC engine was designed to be very efficient and a 10w30 oil (at operating temps) is slightly more economical than a 10w40 will be. Since I want a 10w30 and it is practically impossible to find a 10w30 oil that is JASO rated for wet clutches then I choose the Honda synthetic but I'm sure the GN4 is just as good.
Uh Oh.
I better check my oil bottle........