Gas/fuel consumption

ADIOS600 said:

Interested in what you guys are getting fuel consumption wise. Most forums appear to vary wildly. Is it location,riding style,or fuel type No matter how I ride within reason I get a minimum of 76mpg, Fastish within town/motorway, 80 to 86 mpg, these are average after 130mile ride.What's your take on it all.

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I'm looking at that UK flag (in your log-in logo) and 'wondering'... so maybe I'm wrong here.
If you're using the standard UK measure of UK 76 mpg ... that converts to US 63.3 mpg.
Both results are very respectable for any 500cc-class bike. But clearing up which measurement would be helpful for a clear comparison.

Yes I should have made it clear that figure of 76mpg was for 4.546 litres. This is using E10 fuel 95octane.

My 2017 /F model consistently gets between 70-80 miles per US gallon. I'm very light (135#) and have fitted a 17T counter shaft sprocket, I run the engine in the 2500-5000 rpm range. Honda products have long been known to get excellent fuel mileage and mine is no exception,

Ralph

My average mileage equates exactly to how enthusiastically I am twisting the throttle. If I am just putting around & up-shifting at about 4500rpm I can get something close to 75mph. If however I am being more spirited & pulling shifts at closer to 6-7000rpm mileage falls into the low 60s mpg. US gallons w/ 10% ethanol. The fuel consumption on this engine is amazingly economical for the fun delivered.

On commuting I have 3.7l/100km. When travelling 4.7l/100km.

airhead83 said:

I'm looking at that UK flag (in your log-in logo) and 'wondering'... so maybe I'm wrong here.
If you're using the standard UK measure of UK 76 mpg ... that converts to US 63.3 mpg.
Both results are very respectable for any 500cc-class bike. But clearing up which measurement would be helpful for a clear comparison.

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timur said:

On commuting I have 3.7l/100km. When travelling 4.7l/100km.

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When I filled my cb500f yesterday, it took 14.08 liters after 510 km, which equates to 85.22 mpg US or 102.35mpg Imp on 94 octane E10. We have now traveled 216,440 km (134,490 miles) with motor, clutch, and gearbox untouched since leaving the factory. She still uses no oil and starts and runs as new. Does anyone have one that has traveled further?

I can get 100mpg imperial down hill. I was told by a dealer who wanted my bike in part ex at 12,000 miles it was high mileage lol. What mileage do you do between oil changes.

Old '38, that is fantastic! Has your bike had to have its valve clearances adjusted? Honda Motor should give you a new bike in exchange for advertising your bike's incredible endurance and reliability.
Ralph

krglorioso said:

Old '38, that is fantastic! Has your bike had to have its valve clearances adjusted? Honda Motor should give you a new bike in exchange for advertising your bike's incredible endurance and reliability.
Ralph

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G'day, Ralph. Apart from changing the oil and filter every 10,000 km, I get it serviced every 100,000 km whether it needs it or not. The first time, the valve clearances were checked and needed no adjustment and the plugs changed although they still looked great. At 200,000 km we didn't bother with valves or plugs as it was running well and we considered that like me, her life expectancy must be fairly short, so they could wait until she told me such things were needed. We are still waiting. I don't need a new one as this old girl will see me out, even though I average more than 100 km per day of late. I turn 85 next week.

Great Story, Old'38. I was 86 last month. I love it when our model is called a "beginner's bike"!!
Ralph

3.5./100km on the cb500f. Commuting to and from work, ~14kms each way. Speed lim max for about ~10ks of the ride is 80kph. I hoon occasionally!

I just got my 2021 500F a couple weeks ago but so far I’m getting 3.5/100km or better. Last weekend I was following my brother on his Navi at about 60-65 kph on a level section of road just outside of town with a slight tailwind and my real-time consumption gauge was telling me I was getting 2.0/100km, which works out to over 140 mpg (imperial). Needless to say I was very surprised, but I don’t know how accurate the gauge is in real-time.

The fuel consumption is computed by integrating the length of time the injectors are open and this is adjusted in real time using the airflow sensor and the oxygen sensors in your exhaust to maintain optimum fuel/air ratio and meet performance, emissions and economy targets. You have a nicely run in engine and if you use a higher octane fuel than the tank of fuel you got with the bike, you consumption will drop as you get more “bang for your buck”. Also 60-80kph is probably a sweet spot with respect to aerodynamic losses. It quite common to find you consumption figures are better there than at 100kph. I presume you had to ride to you test route so the engine was nice and warm as compared to your normal average which includes running richer with a cold engine, making then average a bit higher.

I hope that gives you a bit of insight

I get 3,5 Liters/ 100km on average, actual consumption, running with ROZ 95 SUPER.

The calculated fuel consumption on the bike's display is always 1 Liter above actual consumption. So it shows 4,5 L/100km which equals to 3,5L/100km actual consumption.

Octane rating has zero effect on fuel consumption - zero!
Google what octane is for.
What you might find is the highest octane rated fuel is 100% gas - no ethanol - and as such will get you more miles per tank.
But its not the octane rating getting you more miles.

Most non-ethanol gas in my area are a higher octane... partially to make more difficult to compare apples to apples when trying to justify the additional cost per gallon.
Octane has no effect on MPG. But 'non-ethanol gasoline' will always get better MPG than 'ethanol blended gasoline'.
However, the additional MPG with 'non-ethanol gas' may not be enough to offset its much higher cost per gallon.

I never said anything about ROZ effecting milage?! Read the post before implicating that you know more about octane than others.