Gas Mileage?

[redbirds_imp]

I contemplated starting a new thread, but since this thread already has some good information, I figured I'd just add to it.

I was consistently getting between 40 and 42 mpg on my 2014 Std 6 speed.

I weigh about 230 lbs and do mostly suburban driving, ie., average speeds between 35-45 mph but a fair amount of stop signs and lights.

This Spring I changed the oil out from Honda "dino" 10w40 and went with Rotella T6 15w40 full synthetic. My gas mileage immediately improved to 46-48 mpg... And it's been consistent.

Until last week... Yesterday I measured 52 mpg!

That's both by pen and paper and the built-in mileage calculator.

I have another bike that was acting like it had dirty fuel injectors, so I got some Techron injector cleaner for the other bike and it cleared things up.

I had half a bottle of Techron left over, so I dumped it in the CB1100 with a fresh tank of gas.

I had absolutely no apparent issues with the fuel injectors on the CB1100, but it seems like the Techron did some good. 52 mpg is an all-time high for me, and we'll see if it remains consistent.

FWIW, The 15w40 makes the valves a bit louder compared to the 10w40, but I did experience about a 10% mileage improvement immediately following the change to Rotella 15w40.

I know, correlation does not equal causation, and the slightly noisier valves are making me consider a Rotella T5 10w30 for next year, but I'm fine with the T6 15w40 for now.

I have used Shell Rotella T6 synthetic 5W-40 in all my bikes for years now, including an ST1300, Bonneville, Tiger 1050, 2 V-stroms, 2 CB1100s and now 2 NC 750's. The greatest difference noted was in a CB1100 that constantly balked on 3rg gear engagement; I had been using the Honda synthetic 10W-30 during the warranty period and thought that getting it broken in would clear it up. After switching to the Rotella the 3rd gear problem cleared up immediately.