Correlation between speed and MPG - Page 2 - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
DL650 and DL650A - 2004 to 2011 DL650 from 2004-2006 (K4-K6) and DL650 or DL650A from 2007-2011 (K7-L1)

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post #11 of 20 Old 06-30-2018, 04:27 AM Thread Starter
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Full disclosure... I am in Los Angeles, CA. It doesn't get really cold here. "Cold" here means 40-50F...and yes, I still rode in those temperature. The past few gas fill up were between 70-80F. Not sure if temperature range has that much impact on MPG, as speed. And I am using US gallon, not imperial.

Also full disclosure... I use 16T front sprocket and factory 47T rear, so yes I have a taller gear ratio compared to a standard Wee. My RPMs at 85 indicated is just a hair shy of 6000, I would wager they're around 5800-5900.

Here is my log, this is how I track MPG and costs...



I crashed the bike soon on April 21, and laid off riding until my knee healed. You can see the trend in MPG soon after, as that's when I started keeping it at 80 or under.

Replaced the broken bits, back on the saddle and only changed my speed. And here in LA, if you don't at the very least deign to keep up with traffic, you get run over. I've seen fully loaded 18 wheelers haul ass @ 75 MPH, and pick up trucks with heavy trailers (think Dodge Ram with one of those 4 car carrier trailer) in the fast lane passing everyone. As much as I would love to be in 2 lane freeway puttering away at 55, I really can't do that here on the freeway.

I thought maybe its something like winter blend, but here it doesn't even get that cold enough to justify winter blend.

And really, I'm getting good mileage? I would've thought most of you guys would be getting what I am getting... I've noticed that no matter what I do, if I lane split in heavy traffic @ 40 or cruise at 80, I get approximately same mileage overall. My commute is 60/40 freeway/city, though some days I end up doing 90/10 due to my clients.
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post #12 of 20 Old 06-30-2018, 09:14 AM
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Originally Posted by Demorative View Post
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Not sure if temperature range has that much impact on MPG, as speed. And I am using US gallon, not imperial.
...
You may see that much difference for you since you are always riding in warm or hot temperatures and I agree that speed (more specifically airspeed) is the biggest influence.

Temperature can very much make a difference though. Here is a graph of my fuel mileage since I got my DL1000 in the end of July of 2015 and graphs the mileage per tank as of last night's fill-up at 82,285 miles. (The mileage displayed is Imperial MPG but that doesn't change th effect of the graph.)



The yellow line is an average (trendline) of the last 8 fill-ups, the Dark blue line graphs each individual fill-up. The overall trends show worse mileage in cold weather and better in hot and completely corresponds to the daily temperature. The individual peaks and valleys very much correspond to the speed ridden. It can be seen on the right side of the graph with my 6,200 mile ride in May into the USA. I did a lot of slabbing at speeds of 80 to 90 mph and even though temperatures hit 100įf mileage sucked.

One thing I don't see on this graph (or the ones from my 2006 and 2012's a sudden drop that can be attributed to winter gas or increase when back to summer gas. Unless it is gradually phased in I can't see any noticeable effect of winter gas.


..Tom
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2006 DL650: 202,000 km 125,500 miles, Sold
2012 DL650 139,500+ km, 86,700+ miles. Sold
2015 DL1000 New July 2015 180,000+ km, 112,000 miles.

This can help preventing from cars pulling out in front of you (SMIDSY)
SMIDSY detailed report.


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post #13 of 20 Old 06-30-2018, 03:43 PM
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A gas company rep once told me that the 'winter blend' contained 5% butane so it would ignite better in very cold weather. (this was Michigan ) He also said butane does not contribute to any gas mileage. That and longer warm ups made for poorer gas mileage in the winter.
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post #14 of 20 Old 06-30-2018, 04:40 PM
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A gas company rep once told me that the 'winter blend' contained 5% butane so it would ignite better in very cold weather. (this was Michigan ) He also said butane does not contribute to any gas mileage. That and longer warm ups made for poorer gas mileage in the winter.
Good point!

There is almost no reason to "warm up" a modern car or bike. Start them, and when it's safe to drive/ride (ie windows on cars not iced or fogged up etc) then drive/ride away. Just ride easily at the beginning.

I never "warm up" my bikes or cars. Start them and go (apart from scraping car windows!)

..Tom
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2006 DL650: 202,000 km 125,500 miles, Sold
2012 DL650 139,500+ km, 86,700+ miles. Sold
2015 DL1000 New July 2015 180,000+ km, 112,000 miles.

This can help preventing from cars pulling out in front of you (SMIDSY)
SMIDSY detailed report.


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post #15 of 20 Old 07-01-2018, 02:02 PM
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I'm actually in awe that you were getting 45 to 47 mpg riding in the mid 80's! I have recorded the fuel usage and mileage over the 125,000+ miles I rode my 2006 DL650, the 86,000+ miles I had my 20012 DL650 and the 80,000+ miles (so far) on my 2015 DL1000.
I keep a close eye on my mpg, and I average 45mpg combined on my 2006 DL650, unless I drive interstate speeds where my mileage drops back to 40-41mpg.

I should note that I have a tall National V-Stream windscreen with Madstad bracket locked in the most upright position at all times.
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post #16 of 20 Old 07-01-2018, 03:33 PM
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I had a K7 DL650 up until April of this year and got low to mid-40's on the MPG. I don't slab it much so most of that was on two-lane secondary and side roads typically about 50-60MPH but I like to run it hot at around 6-7K RPMs cruising. I sold the K7 and bought a L4 DL650 and I am getting the same gas mileage so I think the rider is the more important factor in MPG. I don't really care too much about the MPG but one disappointment with the L4 is it has a smaller tank and thus a shorter range which I do care about. Apart from a crash, nothing ruins a good ride more than the fuel gauge flashing and then I start worrying about finding a station.

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post #17 of 20 Old 07-01-2018, 10:14 PM
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Want better fuel consumption?? - slow down ! do you really need to be cruising at 80+ mph.

Depends on where you live. Here in the Western US there are 85 mph speed limits in some states.

Most freeways in Los Angeles run at 75+ when traffic is flowing. On a bike you want to be going a bit faster to stay out of trouble.

So yeah you do need to cruise at 80+ sometimes.

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post #18 of 20 Old 07-26-2018, 03:36 AM Thread Starter
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Well, you guys are onto something. And I must say, I'm really liking this trend. Guess I'll be staying at 80 mph from now on.



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post #19 of 20 Old 07-26-2018, 06:59 AM
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Good point!

There is almost no reason to "warm up" a modern car or bike. Start them, and when it's safe to drive/ride (ie windows on cars not iced or fogged up etc) then drive/ride away. Just ride easily at the beginning.

I never "warm up" my bikes or cars. Start them and go (apart from scraping car windows!)

..Tom
If I'm going on a 100 mile ride, I don't bother warming up, just get on it and take it easy till it is warmed.

on the other hand, if I'm just making the 2 mile round trip to the post office, I warm it up.

I never start the bike unless in doing so, the engine gets to a completely warmed up temperature for at least 10-15 minutes

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post #20 of 20 Old 07-26-2018, 08:46 AM
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I get as bad as 38mpg on one very angry tank.as good as 58mpg one easy winding two lane all morning.avg about 45mpg.

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