I'v read with interest these subjects from this sight ,now for those interested I'll pass on what I'v done.
Bought a 2014 RT-S SE6 in May 2014
Took my time Breaking it in. Always used 87 octane. Within 1000 mi noticed rear tire wear in tire center. Dropped air pressure from 28 to 24 because wear indicated to high air pressure. At 3500 mi changed oil and filter. Put in 6 qt, I decided on Amsoil 10-40 motorcycle oil. And noticed more rear tire wear in center, dropped pressure to 19. At 7300 mi tire looked to bad for long trip planned, probably could have got to 8000, but at 7300 I installed a Sumitomo 215-60-15 . Tire works great. I checked oil q 1000 mi. Oil always looked like I just put it in. 5000 on oil looked new. Checked oil often Always looked good and felt good. Always right on full mark and clean. At 13700 ,or 10400 mi. on oil I changed oil and filter again. Spring came 2015. I live in Michigan. Took a trip to Colorado, in colo. I used 85 octane. toured state for 5 days, and rode up pikes peak. Motor has always ran great on 87 and 85 octane. 20000 another trip around north side of Lake Superior. Check oil often ,always on full,and feels good, at 23700 or 10000 on oil start to darken in color.Watch oil close. Always on full,oil feels good, motor starts and runs like new, Has always shifted like the day I bought it. At 29300 I change oil and BOTH filters. 15600 on this oil, Amsoil 10-40 motorcycle oil. Oil was dark not black , sent in a sample.viscosity came back 12.2 .
That's high 30s. A 30 wt. oil is plenty of protection for this Ace 1330 motor. I don't understand all the rest of the info. on the test but the co. rates it normal. Needless to say I,m happy with this oil. 15000 oil change interval no problem.
Rear tire now has going on 23000 mi on it and looks about 1/3 worn. Nice even flat wear. Handles much better too. No belts on the stock tire, that's why it bulges out in the center and will wear out the center 2 inches of the tire. Going down the road you are running on the center 2 inches not the 225 mm. Front tires are good yet at 30000+ miles. Maybe half worn out . Trans filter change no big deal once the panels are off. No venting was necessary.