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Discussion Starter #1
I was having a conversation with a fellow rider the other day about the loss of mileage during the Winter months. Being a former auto technician I could conclude that a certain amount of loss could be attributed to the cooler weather due to a less than efficient engine operating temp. Especially on air cooled engines. So I thought I'd post here and see what others might have to say and to see if others have experienced the same. I seem to be able to maintain in the lower 40 mpg currently however I have gotten the bike to tell me 52 in the middle of Summer. I'm in Colorado and have been riding in 20 - 40 degree temperatures.

Cheers,
Tom
 

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Mine always seems worse in the winter also Tom. Of course I do tend to take longer rides in the summer, so maybe that is a factor as well as the fuel blends.

John
 

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tponten said:
I was having a conversation with a fellow rider the other day about the loss of mileage during the Winter months. Being a former auto technician I could conclude that a certain amount of loss could be attributed to the cooler weather due to a less than efficient engine operating temp. Especially on air cooled engines. So I thought I'd post here and see what others might have to say and to see if others have experienced the same. I seem to be able to maintain in the lower 40 mpg currently however I have gotten the bike to tell me 52 in the middle of Summer. I'm in Colorado and have been riding in 20 - 40 degree temperatures.

Cheers,
Tom
0 miles per gallon as well as 0 miles ridden. Wintertime in Chicago...........
 

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I will apologize in advance, but just can not resist!!

Mine gets between 8 and 11 mpg in the winter.

The only time it is out of the garage is when it's in my enclosed trailer behind my 1 ton Ford Van to take to shop to get ready for the next season.
 

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Tom, could it be you're not riding in the upper elevations lately? I've read here that better gas mileage is seen when riding in the mountains.

Just a guess,
Jer
 

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Also, the fuel companies change the formulas during the winter months. One reason is for colder start ups, but I imagine the EPA has some input too.
 

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There are potentially several contributing factors involved.

As mentioned: winter blend fuels, cooler engine temps.
Also;
-longer warm-up times
-cooler, denser intake air (makes more power but uses more fuel to achieve proper mixture), denser air also results in more wind resistance going down the road.
-Additional load on the engine from running more electrical accessories (heated everything).
-Windshield in a higher position
-Tires run cooler and do not increase in pressure as much
-Lubricants are more viscous in the cold

That's my theory. :bmw:
 

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I just took a long ride 3 weeks ago. I hauled my bike to Chat TN then road it to Naples FL. At least half of the trip was ridden in temps below 40deg. The other half didn't see much above the mid 60's. My mpg was in the low 40's.

David
 
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