MG ehs - consumption not accurate

[jackbelg]

I bought my 2025 MG ehs because I was impressed with the fuel consumption numbers and the 100 km battery. After 1 month how can I get accurate fuel usage? Should I leave it in HEV mode, comfort and do a mix of highway and city driving for one tank? Other than this I am very happy.

 

[BarrieG]

To my mind, any readout on the dash is an average which is compromised by how much time you spend running in each fuel.
My calculations based on actual fuel put into the car vary between 49 and 174 miles per gallon for petrol and 2.8 and 11 miles per kwh depending on whether I'm pootling around town or doing long distance down a motorway.
The only way I've been able to convince myself of the economy of the car is to add together the total costs of petrol and electricity put into the car and compare that to the same time period and similar mileage in my Opel/Vauxhall Insignia 1 5T last year.
Over 7,600 miles and six months I have saved £475 which will pay back the cost of installing the wall box in just over a year.
Apologies, but I will leave you to work out the metric equivalents.

 

[jackbelg]

Thanks, I think the city kWh usage is what you quote. Sport mode obviously consumes more fuel and or kWh. So the numbers are based on driving conservatively, not being enticed by the power .

 

[BarrieG]

The 11 miles per kwh is definitely Milton Keynes city usage, 0 to 70mph and back again between each roundabout, London is much more economical.

 

[BarrieG]

Mmm, whoops, let's have a third look at that 11 miles per kwh figure. I was in France when I wrote that and the dash read out was in metric. That figure was actually the trip, litres per 100km figure of running around Paris with no electric charging.
Going back to my original post, the car is typically showing between 2.8 miles per kwh hacking round Milton Keynes and just over 4 when in London.

 

[HStrophyPHEV2025rc]

@jackbelg - Do not trust the readouts on the car's display, relating to petrol MPG or petrol range. They are incredibly misleading/inaccurate.

• If you want to know how much petrol you have left, you can only trust the gauge (the line underneath where it shows the petrol range).

If you want to know the true petrol MPG then there's no better test than running on pure EV mode until you are empty of charge, then fill the car with petrol to the brim, and make a note of the current mileage. Then drive lots of miles (without plugging into electricity) as a 'test' journey. Then re-fuel your car with petrol to the brim, and note how many litres you pumped in. Then you can tell how many litres it used for that 'test' journey.

• For what it's worth, my MPG is normally around 45 MPG for my typical journeys.
• Edit: Actually, today's long petrol-only journey was more like 40 MPG, so perhaps that's a more accurate figure!

As for how many miles per kWh just fill it up with electricity, set to pure EV mode and go for a drive. Don't accelerate hard or the petrol engine will kick in. You should see it average at about 3 miles per kwh.

• For what it's worth, my car typically drives for approximately 60-65 miles on pure EV mode (with a full EV charge) before it is empty.

Hope this is helpful.