Fuel economy

[MrMike]

Tank has 90 ltr!?

I was referring to the Merc

 

[das mo]

I drove 600km Autobahn at 110km/h yesterday to understand fuel consumption. It weirdly took more Diesel than driving on country roads with all the starts and stops. I assumed 110km/h still being in the economic speed zone, but seems the brick shape behaves differently… Have not fueled up again, but got the please full up soon alert after 550km. :/

 

[MrMike]

The remaining distance is always dubious in any vehicle.
i often find in my vehicle that i get in after a few short trips and it may say 700kms left and then I go onto the highway and it starts to go up as my average fuel economy improves.

After my drive yesterday and conversing wilh the owner we both agreed that the DTE is off, and can only conclude that it should get better with time

 

[CountyV8]

I drove 600km Autobahn at 110km/h yesterday to understand fuel consumption. It weirdly took more Diesel than driving on country roads with all the starts and stops. I assumed 110km/h still being in the economic speed zone, but seems the brick shape behaves differently… Have not fueled up again, but got the please full up soon alert after 550km. :/

The drag increases with the square of the speed.

 

[DaveB]

The drag increases with the square of the speed.

Electric vehicles suffer the same with worse economy at highway speed than around town.
The Grenadier is effectively one brick sitting on top of two bricks.

 

[trobex]

I drove 600km Autobahn at 110km/h yesterday to understand fuel consumption. It weirdly took more Diesel than driving on country roads with all the starts and stops. I assumed 110km/h still being in the economic speed zone, but seems the brick shape behaves differently… Have not fueled up again, but got the please full up soon alert after 550km. :/

Yep - 110km is not efficient for any vehicle when compared to 100km. The differences can be as much as 10-20% more fuel use even on aerodynamic modern cars.
Example, my V6 Triton used aboout 14L/100km average. At 110km on the highway it is chewing 14L/100km - at 100km it chews only 11L/100km. It isn't very aerodynamic.

 

[Arkaig]

My real world fuel consumption figures for a heavy right-footed driver of a diesel Gren are detailed in the icons below in my signature. These can be clicked on to give more detail including AdBlue consumption.

 

[bemax]

I drove 600km Autobahn at 110km/h yesterday to understand fuel consumption. It weirdly took more Diesel than driving on country roads with all the starts and stops. I assumed 110km/h still being in the economic speed zone, but seems the brick shape behaves differently… Have not fueled up again, but got the please full up soon alert after 550km. :/

I thought as well that up to 120 km/h the consumption would be reasonable low. Disappointingly everything over 100 km/h brings the thirst up significant.
It is nothing about a run in of the engine and transmission I believe.
Maybe 80 % drag and 20 % adjustion /run in of all other moving parts.

 

[das mo]

Also the 110 on speed control being real 104 ish.

 

[Miki]

Here we go, we're being taken over by the Euro's ....

Convert 14 Liters per 100 km to U.K. MPG

What is 14 L/100 km in U.K. MPG? You can use this easy, mobile-friendly calculator to convert 14 L/100 km to British miles per gallon.

www.calculateme.com

Convert 14 Liters per 100 km to U.S. MPG

What is 14 L/100 km in U.S. MPG? You can use this easy, mobile-friendly calculator to convert 14 L/100 km to American miles per gallon.

www.calculateme.com

 

[bemax]

Also the 110 on speed control being real 104 ish.

That’s a bigger deviation than my one has. It’s only up to 4 % as far as I remember. But I didn’t check at exactly this speed.

 

[Krabby]

Electric vehicles suffer the same with worse economy at highway speed than around town.
The Grenadier is effectively one brick sitting on top of two bricks.

Not sure if any of you have driven in the north east part of the US but in New Jersey we drive in a particular way to help increase fuel economy. Here’s a photo of the technique.

 

[Lollo050968]

So arrived at holiday place for next two weeks in Scotland. Fuel consumption was between 13.75-14.2 l. Now in UK following strightly the 70 MpH, the 400km on the continent 125-130 km/h.
In UK with E10 petrol a little bit higher consumption

 

[emax]

20,17 mpg (UK) but falling

Falling?

Falling consumption is increasing mpg. Which one do you mean?

 

[emax]

DTE

?

 

[das mo]

I drove 600km Autobahn at 110km/h yesterday to understand fuel consumption. It weirdly took more Diesel than driving on country roads with all the starts and stops. I assumed 110km/h still being in the economic speed zone, but seems the brick shape behaves differently… Have not fueled up again, but got the please full up soon alert after 550km. :/

I ended up with 11,46 litre Diesel / 100km.

 

[MrMike]

?

Apologies, Distance To Empty

 

[Trialmaster]

Not many miles on the vehicle yet (why because I am posting here). 22mpg or 12.84 Liters per 100 km

 

[emax]

The remaining distance only tells you: "If you continue to drive with the current conditions, the fuel will last for xxx km."

But the conditions are changing continuously: engine- / oil- / outside- / tire temperature. Highway or citiy, hill up or hill down. One might think that an average would help, but the indicated distance actually is already an average.

Just switch to the "current fuel burn" gauge. It varies from zero to 30 l/100 km within a second. So there is no way except an AI algorithm to get a better figure for the remaining distance:

"It's Monday morning 8:00 am. On Mondays at this time there is heavy traffic. As every Monday morning, mom brings their children to school, so it's a short ride where the engine won't get to operating temperature. Yesterday there was a report about emancipation in the TV and she very likely argued with her husband. So she will have had a bad night and drive aggressive and unconcentrated. Based on these facts I can predict a fuel burn of 25 l/100km. So the remaining distance is 80 Km."

​

...

May god save us from any AI in our Grenadiers.


wording, typos

 

[Lollo050968]

Falling?

Falling consumption is increasing mpg. Which one do you mean?

Falling was l/km, sorry in mind everytime continental measuring …
at the moment around 12.8-13.2 l/100km, 22-21,4 MPG (UK)