Highway Speed RPM

[tehrlich]

I calculate MPG with every tank. With 10%ethanol and my riding style I get on average 33mpg. When we go to Oklahoma to spend time with the in-laws I buy 91 nonethanol and ride fast and for long long times to get out. Lol. Always get about 38mpg. That’s 15% increase. Plus, I feel faster with it.

ethanol sucks.

 

[tehrlich]

I’m at 28000 miles on my 2015 RT. It seems like my RPM shifting points have slowly changed over time. Now, it could totally be my riding style or increasing experience, but in the early miles I was always shifting begore 4000 RPMs. Now, I’m 4000-5000RPMs. It really feels like the engine is running stronger and better.

Maybe it takes a number of miles for the engine to ‘break in?’

 

[Easy Rider]

Seriously? I said two things to imply two things: slower riding and the nonethanol. 45mpg

But, when I get nonethanol high octane, I do get a bump in mpg. I see it every time.

Yes, seriously. ALL of what you say ties into the overall thought.

In this case, your comment started out with "When I use non-ethanol gas, I get a HUGE increase in fuel mileage."

And I am saying that the gas alone will NOT make a "huge" difference.

 

[ARtraveler]

I will give you folks another reading for the Spyders on my next fill. I am using 87 octane this year for all my bikes.

I just had a "tune up" on the 998 and it got new spark plugs at 28K.

The Vulcan got 47.6 last tankfull. That is a little better than "usual."

UPDATE: 1330 39.1 998 31.8 that's up from 29/30

 

[Docster]

Seriously? I said two things to imply two things: slower riding and the nonethanol. 45mpg


But, when I get nonethanol high octane, I do get a bump in mpg. I see it every time.

Agree, every time.

 

[IdahoMtnSpyder]

I calculate MPG with every tank.

Here's an example of why tank to tank comparison of MPG are meaningless. I've found that you have to average out at least four tanks and better yet, ten tankfuls. Here's a graph I posted last year here: http://www.spyderlovers.com/forums/showthread.php?109153-Guess-when-I-used-Premium-vs-Regular

This is my tank by tank MPG.



Here's my 10 fill running average MPG. Much smoother but still looks like the Rockies.

 

[tehrlich]

LOL...

Let's just take it to the level of standardizations and a confidence level of P=0.05.

Riding a motorcycle is fun for me. I'm going to look at each MPG tank because all other variables are the same for me. Over 10 tanks, I've already forgotten about the last nine. Life is too fun and moving forward.


My scientific and statistical study conclusions: ethanol sucks.

A political conclusion: a subsidy our government should get out of.

 

[Lew L]

+1

 

[IdahoMtnSpyder]

My scientific and statistical study conclusions: ethanol sucks.

A political conclusion: a subsidy our government should get out of.

There's good reason to feel that way, but the question is, what should be used to replace it? Here's a comment I made in the thread I link to above.

The move to E gas was prompted in large part to high levels of imported oil, the fact that corn is home grown, and its ability to boost octane number and help with emission control. One of the drives to E15 is to get more power via compression boost. The original octane booster, tetraethyl lead, is an environmental poison. I read years ago that traces of lead have been found on high mountain top water sources. The only place it could have come from was vapor from gasoline burned in vehicles. The replacement for ethyl was MTBE, but it too is an environmental pollutant when gasoline containing it leaks into the ground, not an uncommon problem.

As an octane booster and oxygenator, and having a lower pollution factor, ethanol looks to be the best choice. From the standpoint of energy output, not including the argument it takes more energy to produce it than it produces, and the impact on food supply, it is a poor choice. As in all things of life, there are no easy answers! :banghead:

In this thread the chemical ETBE was mentioned as an octane booster. http://www.spyderlovers.com/forums/...n-the-spyder&p=1362449&viewfull=1#post1362449. The downside is that it is 45% ethanol.

Penn State issued a paper giving, I believe, a reasonably well balanced view of ethanol vs. non-ethanol fuel. https://extension.psu.edu/fuel-ethanol-hero-or-villain.

Here's a discussion about a increased push by EPA to use more ethanol with a link to submit a petition against using ethanol.
https://goldwingdocs.com/forum/viewtopic.php?f=10&t=43425&sid=53a4d1181666524e400d51f5a0f1d351

Until the petroleum industry comes up with an octane booster that is environmentally safe and less costly than ethanol, I fear we are stuck with ethanol.

 

[Myron Ah]

Highway speed RPM

I do not get on the highway much. our 2013 RTS was getting low 30's. After a short time I started running high test octane and gained a couple mpg's. This is our four year and I started running as suggested, high rev's. I keep it in the 4000-5000 range mostly. Hardly ever get into 5 gear unless long cruise at around 60mph. Probably gained another 2 mpg's, maybe more depending on speeds. puts me mid 30'sand up. But I ryde for fun not fuel mileage.

 

[Mazo EMS2]

With the new tire I just put on, I find 60mph at 3100 rpm. A little different than stock, and a speedometer that's correct....:yes: