The Grenadier Forum
Register Now for enhanced site access.
INEOS Agents, Dealers or Commercial vendors please contact admin@theineosforum.com for a commercial account.

Petrol/Gas B58 petrol fuel economy

Andras

Grenadier Owner
Local time
12:56 AM
Joined
Sep 7, 2023
Messages
11
Reaction score
9
Location
Budapest, Magyarország
I thought I might share with you the fuel economy figures of the last 8000kms (now at almost 10k)
Pls see the excel pic. atrached.
…..would love to have an auxiliary fuel tank!!!
IMG_9327.jpeg
 

Tazzieman

Grenadier Owner
Lifetime Supporter
Founding Guard
Local time
10:56 AM
Joined
Sep 30, 2021
Messages
6,642
Reaction score
13,222
Location
Tasmania
What is your typical usage - terrain , loading etc?
 

farmfresh

Grenadier Owner
Local time
7:56 PM
Joined
Dec 19, 2023
Messages
2
Reaction score
4
Location
Earth
US owner here. Thanks for posting the sheet. I have been curious about the Rest of World fuel economy numbers from owners with more clicks on the odometer.

To add another data point, the best I've seen for my petrol is 18.6 mpg (12.65 l/100 km) on a 320 mile (500 km) trip on tarmac under ideal conditions. Typical result is closer to 16.5 mpg (14.25 l/100 km).
 

Tazzieman

Grenadier Owner
Lifetime Supporter
Founding Guard
Local time
10:56 AM
Joined
Sep 30, 2021
Messages
6,642
Reaction score
13,222
Location
Tasmania
To add another data point, the best I've seen for my petrol is 18.6 mpg (12.65 l/100 km) on a 320 mile (500 km) trip on tarmac under ideal conditions. Typical result is closer to 16.5 mpg (14.25 l/100 km).
Is that for the actual calculation or what the car computer tells you?
 

DaveKop

Grenadier Owner
Lifetime Supporter
Local time
6:56 PM
Joined
Nov 10, 2021
Messages
13
Reaction score
16
Location
Prague, Czechia
I'm curious about the divergence of computer vs reality folks see here.

In my first 5 tank refills I found the computer to be about 1-2 liters off in what it claims as average fuel consumption. Computer hovers around ~15.5L/100km (~15mpg) for mostly sub 90km/h, mostly even surface dirt or pavement mountain roads and some city. Reality at the pump is more like 17-18L/100km (~13.5mpg).
Roof rack, KO2s, ~250kg load
 

Tazzieman

Grenadier Owner
Lifetime Supporter
Founding Guard
Local time
10:56 AM
Joined
Sep 30, 2021
Messages
6,642
Reaction score
13,222
Location
Tasmania
I'm curious about the divergence of computer vs reality folks see here.

In my first 5 tank refills I found the computer to be about 1-2 liters off in what it claims as average fuel consumption. Computer hovers around ~15.5L/100km (~15mpg) for mostly sub 90km/h, mostly even surface dirt or pavement mountain roads and some city. Reality at the pump is more like 17-18L/100km (~13.5mpg).
Roof rack, KO2s, ~250kg load
Others have noticed this. I remain unconvinced that computers are smarter than smart humans 😁
 

alvan

Grenadier Owner
Lifetime Supporter
Local time
12:56 AM
Joined
Mar 3, 2023
Messages
288
Reaction score
905
Location
Cagliari,Italy
9000 km. Mainly commuting 13.3 lt/100km
 

Jean Mercier

GG#920
Grenadier Owner
Lifetime Supporter
Local time
12:56 AM
Joined
Sep 10, 2022
Messages
2,626
Reaction score
9,390
Location
Sint-Martens-Latem, Belgium
Interesting to see the @Andras table, so let's post mine too, based on ODO meter readings and real liters filled in my tank
1706737693557.png


The mean value is 15.29 l/100 km petrol.

No roof rack, mixed driving, but quite a lot of motorway, not very often 4X4 driving, usually not very loaded. no towing at all!

I have also a graph:

1706738059184.png


Some of the peaks in my first 13000 km were motorways, including German motorways.
But in winter there is clearly a higher fuel consumption, see the steadily rising consumption after my 15000 km (that was end of October).
For those who doubt about it, I have two arguments:
  1. In winter, the car uses more energy: lights, heating, cold motor (worse combustion)
  2. I experienced this with all my previous cars, most being diesels, some were petrol.
I have another graph, derived from the previous one, to prove this, I will not enter in technical details about the mathematics (not really difficult), but the graph is called CUSUM. Don't look at the numbers (they have no meaning), look at the pattern:
  • More or less downward slope in summer, more or less upward slope in winter!
  • An upward slope means higher consumption
  • The strange peaks in May and September are my travels to Hungary: a lot of German motorways and more load in the car.
  • I did not travel in Winter, otherwise I also would have seen strange peaks
1706738813358.png


Final comment: my ODO meter shows 132 km/h while I am driving 127 km/h according to my GPS. The GPS speed is the more correct speed.
The difference is 4%.
This means that when my ODO meter tells me that I have driven 100 km, in reality I have been driving only 96 km!
Therefore my real consumption is also higher than my table above.

In fact I consumed an average of 15.89 l/100 km petrol.
( again: usually not very heavily loaded, a lot of mixed driving, almost no 4x4, no towing)
 

Andras

Grenadier Owner
Local time
12:56 AM
Joined
Sep 7, 2023
Messages
11
Reaction score
9
Location
Budapest, Magyarország
Thank you Jean for your precise data and graphs.
Its nice to see you managed to pump 90,94 liters also.😂 When is your next trip to Hungary…?
Btw still struggling with water leak at the drivers side safari window. 😳😡
 

Tazzieman

Grenadier Owner
Lifetime Supporter
Founding Guard
Local time
10:56 AM
Joined
Sep 30, 2021
Messages
6,642
Reaction score
13,222
Location
Tasmania
@Jean Mercier the speedometer does read higher than actual , but is it related/linked to the odometer?
I have no idea. These computers just confuse me.
 

alvan

Grenadier Owner
Lifetime Supporter
Local time
12:56 AM
Joined
Mar 3, 2023
Messages
288
Reaction score
905
Location
Cagliari,Italy
Is your car a diesel?
If this is a petrol this is very low!
Petrol. Actually, the Grenadier taught me to be a truly prudent and law-abiding driver after decades of very heavy foot driving. Previously my goal was the highest possible average speed, now the lowest possible average consumption... Another form of driving fun...
 

Jean Mercier

GG#920
Grenadier Owner
Lifetime Supporter
Local time
12:56 AM
Joined
Sep 10, 2022
Messages
2,626
Reaction score
9,390
Location
Sint-Martens-Latem, Belgium
Thank you Jean for your precise data and graphs.
Its nice to see you managed to pump 90,94 liters also.😂 When is your next trip to Hungary…?
Btw still struggling with water leak at the drivers side safari window. 😳😡
My son comes over for a week in February, therefore my next trip to Hungary will be or April or June. Nothing planned.
For your Safari window, try to put a layer of Sikalastomer on the rubber joint: this should solve the problem temporarily, but probably you tried that.

@Jean Mercier the speedometer does read higher than actual , but is it related/linked to the odometer?
I have no idea. These computers just confuse me.
I guess so: the car measures the number revolutions of the wheel, and the car computer computes - based on diameter of the wheels) the distance (odometer) and computes also the speed with data of the clock.
@Jean Mercier - In the US, the mixture of ethanol on the gas is increased in winter to help lower emissions. The obvious downside to that is an increase in fuel consumption. Is that also done in your country? Belgium I believe?
Well, wel ... I learn every day: you are right, completely right, never thought about this!
 

Andras

Grenadier Owner
Local time
12:56 AM
Joined
Sep 7, 2023
Messages
11
Reaction score
9
Location
Budapest, Magyarország
My son comes over for a week in February, therefore my next trip to Hungary will be or April or June. Nothing planned.
For your Safari window, try to put a layer of Sikalastomer on the rubber joint: this should solve the problem temporarily, but probably you tried that.
The glass window itself was changed
The water “downpipe” was sealed with sikaflex on both sides of the roof metal sheet
The rubber seal of the window has been changed also by ineos
Now waiting for a complete new window+hinges+new style rubber seal for both windows…..
Till than headlining wet in rain…..😳🥲
I guess so: the car measures the number revolutions of the wheel, and the car computer computes - based on diameter of the wheels) the distance (odometer) and computes also the speed with data of the clock.

Well, wel ... I learn every day: you are right, completely right, never thought about this!
 
Back
Top Bottom