Good thoughts and comments Randy. There's just one thing I'd like to comment on and that is the myth that synthetics are no good for breaking in a motor. Many people seem to think that synthetics are too "slippery" for the needed ring brake-in procedure, but Mobil 1 disproved this many ago when they showed their synthetics were fine for engine break-in procedure in all forms of cylinders and ring combinations. Also, a retired Mobil 1 lubrication engineer (George Mason) came on the Ducati Monster List back in 2009 and blew all the cob-webs out of the myths and old wives tales about synthetic oils that have been around for decades.......especially breaking in a new motor with synthetics.
Mr. Mason went on to say the real reason not to use synthetics for engine break-in was it was just a waste of money and product because break-in oil should be changed several times during the break-in and any SG/MA rated dino (cheaper) oil would do just as good........but synthetics are designed to run for 2x--3x times longer than dino oils......why throw expensive synthetic oils in the trash when cheaper dino oils would do the same job for the limited time they were in the engine. So he recommended using dino oil for the 2--3 oil changes, then once the engine had puked all it's break-in debris....... then go to a full syn and enjoy it's extended lubrication qualities.
Btw....... your HD motor runs cooler because you've reaped on of the benefits of a lighter weight oil......and you can run a lighter weight oil because of the superior film strength and lubricating properties of a synthetic oil. This was one of many things Mr. Mason told us on the Monster List...... "thinner oils conduct heat better than heavy oils, so use the lightest weight oil the engine manufacturer allows, avoid the common misconception that heavy oil is better..... it's not."
I specifically asked about the CBX engine and he said not to go past Honda's 10W--40 recommendation and Mobil 1 4T 10w-40 SG/MA rated oil was the perfect oil for the CBX.
Note: the Mobil 1 15--50 is a car oil.
http://www.mobiloil.com/USA-English/Mot ... 5W-50.aspx You might want to consider a "SG/MA" rated motorcycle oil like Mobil 1 20W-50 "V-Twin" oil made specifically for your bike.
http://www.mobiloil.com/USA-English/Mot ... 0W-50.aspx
$.02.
It's not what you ride.....it's how you ride.