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 Worst Fuel Mileage ever....for me

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sidrat
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PostSubject: Worst Fuel Mileage ever....for me   Mon Apr 03, 2017 1:30 pm

Filled up over the weekend and went for a blast, normally average 40mpg, but for one tankful only got 30mpg (that's imperial gallons)

I was so concerned i genuinely thought i must have a leak. Anyway filled up again and will ride it to work this week and see if it returns to normal.
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NorthernProducer
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PostSubject: Re: Worst Fuel Mileage ever....for me   Thu Apr 06, 2017 7:37 pm

Assuming you weren't riding at full throttle for that tank full...is it possible you had "bad" fuel on that fill-up? Not sure if you get to ENJOY seasonal blended fuel in the UK, but that can result in reduced mileage. Try changing to another branded fuel on your next fueling and let us know how that works out.
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sidrat
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PostSubject: Re: Worst Fuel Mileage ever....for me   Thu Apr 06, 2017 8:05 pm

that is a good point, i had not considered the fuel itself, i filled up at a garage i have never used before. I am going to run another tankful through it this weekend so i shall see.

Never had to worry i might run out with less than 100 miles showing since i had an S4rs Monster
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Brent S
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PostSubject: Re: Worst Fuel Mileage ever....for me   Fri Apr 07, 2017 8:44 am

At the risk of opening a can of worms, I'm only getting around 30mpg equivalent around the suburbs on my GRiSO. Improves to around 37-40mpg on the highway. I've had the lambda disabled and had the idle mixture trimmer adjusted to make it richer across the range, as I had bad problems with surging, backfiring and popping with my Termignoni exhaust. Throttle bodies have been balanced by somebody I trust.

I realise the more permanent fix is to get a customised fuel map, but I haven't got around to doing that yet. I get around 200kms (125 miles) from a full tank until the fuel warning light comes on.
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H-E-ROSS
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PostSubject: Re: Worst Fuel Mileage ever....for me   Fri Apr 07, 2017 9:07 am

I get around 135 miles before the low fuel light with a mix of highway (high speed) and doping around town. I have a Termi and I am running a Beetle Map designed for it. Brent, just do it! You won't regret it.
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LBC Tenni
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PostSubject: Re: Worst Fuel Mileage ever....for me   Fri Apr 07, 2017 11:06 am

+1 for the Beetlemap. I've got a Zard. Runs like a top and I average 40+ mpg even with our piss ethanol fuel. Biggest bang for your buck change you can make.
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sidrat
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PostSubject: Re: Worst Fuel Mileage ever....for me   Fri Apr 07, 2017 11:51 am

I too have a beetle Map, that is currently residing on my PC until the weather got warmer, maybe now is the time to re-install, but i went most of last year without this mileage, maybe i am bucking the trend and getting faster in my old age!!
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sidrat
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PostSubject: Re: Worst Fuel Mileage ever....for me   Tue Apr 11, 2017 12:13 pm

Normal service has been resumed, two tankfulls over the weekend and back to normal, i can only assume that it was a bad tank of fuel as NorthernProducer pointed out.

It was however 25 degrees on Sunday and i was riding 100 miles at the speed limit!
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2highlander
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PostSubject: Re: Worst Fuel Mileage ever....for me   Tue Apr 11, 2017 6:52 pm

Fuel consumption of my GRiSO extremely depends on outside temperature. Below 10 C it partially swallows more than 1 Liter as usual which normally is 5,7 / 100 km.


Last edited by 2highlander on Tue Apr 11, 2017 11:24 pm; edited 1 time in total
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sidrat
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PostSubject: Re: Worst Fuel Mileage ever....for me   Tue Apr 11, 2017 7:24 pm

2highlander wrote:
Fuel consumption of my GRiSO extremely depends on outside temperature. Below 10 C it partially swallows more than 1 liter more than usual which normally is 5,7 / 100 km.

Wow that works out at 50mpg, i have never got anywhere near that! i normally average 7.1 l /100km, which after a tankful at 9.5 l /100km!
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2highlander
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PostSubject: Re: Worst Fuel Mileage ever....for me   Tue Apr 11, 2017 11:27 pm

Uh, in fact thats a lot and I surely don't head forward in sleep mode.
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dennis the menace
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PostSubject: Re: Worst Fuel Mileage ever....for me   Wed Apr 12, 2017 2:56 am

i had problems with shitty fuel got that sorted and rebooted the ecu and while it was relearning saw 4.3l/100kms it fluctuated a bit even saw 7.1l/100kms seems to have settled down to 5.4l/100 been fairly constant smooth running no surging or rough running i'm happy i'm using 98 octane premium fuel. cheers
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