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post #1 of 35 (permalink) Old 03-24-2015, 06:44 AM Thread Starter
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Default Poor mileage in Texas

I moved from Denver, CO to Austin, TX and since then my mileage has gone from 38-42 down to around 30. Do I need to have something done to adjust for altitude difference?

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post #2 of 35 (permalink) Old 03-24-2015, 07:21 AM
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Sounds like it. I consistently get 40-43 depending on speeds and how long I spend on the interstate.
It may be an adjustment period, but I don't think the ECM and such are all that smart. And I have to ask, are you in to the throttle a lot with your new found HP on the bike? Round Rock may lead to some "different" riding habits due to traffic, highway speeds, etc. Still I would think it would be better. Oh yea, watch where you get gas, you are in the area that folks think E85 and E15 are a good thing. I doubt you got in to the 85 stuff but may be getting in the E15, try changing stations and see if that helps.
Any mods? Usually an EFI engine adapts pretty well to altitude changes.
It will be interesting to hear the conclusions here.

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post #3 of 35 (permalink) Old 03-24-2015, 07:45 AM Thread Starter
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I am using the highest octane at Murphy USA and Chevron. The pumps say 10% ethanol. I have made a conscious effort to go easy on the throttle and still bad mileage. I work downtown Austin so take I35 at about 6:00am. No stop and go there and go about 70-75mph. Home, there is some stop and go but again, because of the time, not much.

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post #4 of 35 (permalink) Old 03-24-2015, 07:52 AM
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Interesting. I live out SW and work downtown (Capitol) and still get my 38-42 mpg. I also come in early (6:00 - 6:30am) and leave early-ish. Mods below.

Will follow along to see if you get this figured out. Hopefully it's just a temporary glitch.

Dan

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post #5 of 35 (permalink) Old 03-24-2015, 09:39 AM
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Quote:
Originally Posted by pgreen7436 View Post
I am using the highest octane at Murphy USA and Chevron. The pumps say 10% ethanol. I have made a conscious effort to go easy on the throttle and still bad mileage. I work downtown Austin so take I35 at about 6:00am. No stop and go there and go about 70-75mph. Home, there is some stop and go but again, because of the time, not much.
Well 10% ethanol is 10% too much in my opinion.
Yeah sure they will run on it but your fuel mileage will suffer, as will your engine over time.
I wouldnt put that crap in a lawnmower.
my mileage can vary from a great 20 kms to the litre steady cruising which equates to (calculator out)
3.9litres to a US gallon = 80 kms= 50 mpg US
riding real hard 14 kms per litre = 55kpg = 34mpg US
normally I get 16-18 kpl

I use only Premium 98 Aus which equates to 91 US octane unleaded
with zero ethanol.

Sounds like you have a problem and its not just poor gas, is your airfilter clean?

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post #6 of 35 (permalink) Old 03-24-2015, 09:48 AM
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LOL, Despite what so many think, it is very hard to find gas without corn squeezins in the US. These engines have been designed for the junk since the 1970's. Small engines like lawn mowers and such have a tough time with it. Carbs didn't always play well either, and still don't.
Unless he is getting some trashy fuel, it would seem all should be the same.

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post #7 of 35 (permalink) Old 03-24-2015, 11:10 AM
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Quote:
Originally Posted by Motorbikerx View Post
Well 10% ethanol is 10% too much in my opinion.
Yeah sure they will run on it but your fuel mileage will suffer, as will your engine over time.
I wouldnt put that crap in a lawnmower.
my mileage can vary from a great 20 kms to the litre steady cruising which equates to (calculator out)
3.9litres to a US gallon = 80 kms= 50 mpg US
riding real hard 14 kms per litre = 55kpg = 34mpg US
normally I get 16-18 kpl

I use only Premium 98 Aus which equates to 91 US octane unleaded
with zero ethanol.

Sounds like you have a problem and its not just poor gas, is your airfilter clean?
funny you say that, my mower says on the gas cap that if you use ethanol gas your warranty is void

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post #8 of 35 (permalink) Old 03-24-2015, 11:24 AM
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Quote:
Originally Posted by HowardGNelson View Post
funny you say that, my mower says on the gas cap that if you use ethanol gas your warranty is void
Well there ya go!

and Lost in Texas no way "all should be the same" its a proven fact youll get less mpg out of ethanol blends

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" " 495 cams
" " TorqueTubes
" " timing wheel @4 deg.
" " Primary plate
" " IAV
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Stebel air horn
12.106 @110.90mph
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" " VM1 Cams
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post #9 of 35 (permalink) Old 03-24-2015, 11:30 AM
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Well there ya go!

and Lost in Texas no way "all should be the same" its a proven fact youll get less mpg out of ethanol blends
And its a proven fact that the difference is very little, so you won't really notice
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post #10 of 35 (permalink) Old 03-24-2015, 12:36 PM
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I would think that even ethanol wouldn't cause a drop that significant in the mileage. That said if you want to try some pure gas check one of the marinas around one of the lakes. Most of them carry "E0" for the boats.

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