It's probably too early to say I've learned anything interesting, but I can tell you this...
(However, remember, this is a new bike, the engine is still breaking in, so furthermore, it's probably way to early to make any assumptions):
1) From the dealer with presumably high octane premium fuel in the bike - the bike ran fine but was averaging about 45MPG from brand-spanking-new mile 2 to 250 miles.
2) When gauge showed 50 miles to empty (so about 1 gallon left) I added 2 gallons (mid-grade) 89 octane on my first fill up. The bike ran fine and avg'd about 47MPG over about 150 or so miles.
3) When bike was at 50 miles to empty this last time, today, I added 3.5 gallons (regular) 87 octane.
Watching the avg cons readout, I immediately noticed better gas mileage. Over about 20 miles, I'm now avg. 56.7.
Furthermore, I opened her up a bit today for the first time, really. Nothing too crazy, but on a couple of nice country lane straightaways, I let her rip a bit, shifting at around 5k RPMs between 2nd-3rd, 3rd-4th, and 4th-5th. And I gotta say, she just flat out *took off*! This bike has plenty of power--and to spare! She accelerated like a bat out of **** (and I wasn't close to red-lining her). Color me impressed. And this, with the mostly 87 octane fuel in her.
I may just be imagining it a bit or it may have more to do with the engine breaking in (she's only got about 450 miles on her yet) but it seems to me she runs better on the regular stuff. Time will tell. I'll keep testing. But for now, all is well.
Last edited by garyh; 07-27-2018 at 05:19 PM.