Fuel consumption

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DeRox
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Fuel consumption

Post by DeRox » Fri Feb 09, 2018 4:01 pm


The guy that rode a H2SX back from Portugal to The Netherlands over 2200km had to refuel 16 times. His score:

Min usage: 1 liter for every 15,44 km = 6,48/100 km
Max usage: 1 liter for every 10,51km = 9,51/100 km
Average usage: 1 liter for every 12,58km = 7,04/100 km.

He rode mainly on highways.

Not very fuel economic, but it's reasonable I guess :yes:
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Hillman
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Re: Fuel consumption

Post by Hillman » Fri Feb 09, 2018 5:47 pm


did the guy actually write up his thoughts on the ride?

And for the nonmetric people

Min usage: 36.3 miles per gallon
Max usage: 24.8 miles per gallon
Avg usage: 33.4 miles per gallon

were these based on computer readings, or odometer and actually fuel metered in at each stop? I thought I read one review that said he got 39 mpg during the press launch ride.
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Re: Fuel consumption

Post by DeRox » Fri Feb 09, 2018 6:05 pm


The write up follows. He measured at each stop.
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Re: Fuel consumption

Post by cOoTeR » Fri Feb 09, 2018 9:49 pm


Wasn't he riding in bad weather? That will effect the fuel economy if he's riding under the speed limit and on and off of the throttle a lot due to conditions.
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Re: Fuel consumption

Post by DeRox » Fri Feb 09, 2018 9:56 pm


Well, kinda. Temps were around freezing...
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Re: Fuel consumption

Post by JonTheChron » Fri Feb 09, 2018 11:34 pm


Doesn't fuel economy increase when temps drop?
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Re: Fuel consumption

Post by UFO » Fri Feb 09, 2018 11:52 pm


JonTheChron wrote:
Fri Feb 09, 2018 11:34 pm
Doesn't fuel economy increase when temps drop?
Fuel economy is worst when temperature drops for several reasons:

1) Air density increases as temperature drops, therefore your are packing more oxygen into the engine at a same given RPM. In most modern vehicles the ECU will inject more fuel to try and maintain a dictated A/F ration as detected by O2 sensors. The upside is your vehicle should feel more energetic. :lol:

2) Air density increases as temperature drops, therefore overall drag (wind resistance) is increased, so it takes more energy (fuel) to push the vehicle through the air.

3) Tire pressures are usually lower than normal, increasing additional rolling resistance.

There are other minor affects as well. For cars the EPA found:
The U.S. Environmental Protection Agency (EPA) estimates that a drop in temperature from 24°C to 7°C can increase fuel consumption in urban commutes by 12 to 28%
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Re: Fuel consumption

Post by JonTheChron » Sat Feb 10, 2018 12:48 am


UFO wrote:
Fri Feb 09, 2018 11:52 pm
JonTheChron wrote:
Fri Feb 09, 2018 11:34 pm
Doesn't fuel economy increase when temps drop?
Fuel economy is worst when temperature drops for several reasons:

1) Air density increases as temperature drops, therefore your are packing more oxygen into the engine at a same given RPM. In most modern vehicles the ECU will inject more fuel to try and maintain a dictated A/F ration as detected by O2 sensors. The upside is your vehicle should feel more energetic. :lol:

2) Air density increases as temperature drops, therefore overall drag (wind resistance) is increased, so it takes more energy (fuel) to push the vehicle through the air.

3) Tire pressures are usually lower than normal, increasing additional rolling resistance.

There are other minor affects as well. For cars the EPA found:
The U.S. Environmental Protection Agency (EPA) estimates that a drop in temperature from 24°C to 7°C can increase fuel consumption in urban commutes by 12 to 28%
very informative, thanks

I just figured that the Air Intake Temp. sensor would send temp. data to the ecu to compensate for this
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Re: Fuel consumption

Post by ghostwriter78 » Mon Feb 12, 2018 9:55 am


Im gonna test it in other extreme this week. 40C+ air temp and high road temp
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Re: Fuel consumption

Post by JonTheChron » Mon Feb 19, 2018 11:56 pm


Ok, I got the info you guys were looking for. Here is it, directly from KHI.

According to the info sent to the Japanese Ministry of Transport using using test methods approved by the WMTC the H2 SX at speeds of 60 KMH measured on a dynamometer.. consumes 27 km/L

In American values that's 63.5 MPG

In other standard tests that reflect the real world, the H2 SX consumes on average 17.9 km/L which equates:
42.1 MPG (US)
50.6 MPG (UK)




http://www.khi.co.jp/news/C3180201-3.pdf
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