What octane fuel do you use?

As we know Kawasaki recommends 90+ octane. This has proved to be fairly accurate on my 2007 Nomad. Before I bought it two dealers said that high test wasn't required most people ran 87 octane. 87 octane will work in mine only if I do not really unitize the roll on performance that this engine has. If I am only going back and forth to work or just slowly cruising the back roads I could probably get by with 87 octane, but even then if the weather is hot I can get serious ping at times on acceleration.
Because of this for normal day to day use I use 89 octane which is a improvement over the 87 octane but still will spark knock more than I like under certain conditions. For serious ridding such as the 1,250 mile round trip I just returned from to the Cherohala Skyway and Deals Gap area I use 93 octane. Even on 93 under extreme hot conditions I get some acceptable pinging.

I have not experimented with the TPS adjustment and may not as this seems to be a trade off between fuel mileage and octane requirements. On the recent 1,250 trip I averaged 44.5 MPG that was total trip average including some 75-80 MPH interstate and the slow mountain highways . I was pleased with this as the Nomad only has about 3,500 miles on it at trip completion and is probably not complete broken in yet.

So it seems that the 90+ sticker on the tank is right. I will probably be using 89 octane for easy ridding and full high test 92 -93 octane for serious ridding.

I was wondering if some of you other Nomad owners are finding this to be the case with your Nomads.