Interesting to see the
@Andras table, so let's post mine too, based on ODO meter readings and real liters filled in my tank
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:
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:
- In winter, the car uses more energy: lights, heating, cold motor (worse combustion)
- 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
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)
When is your next trip to Hungary…?
