Highest Efficiency Number You’ve Seen?

[CarbonEV]

What’s the highest efficiency number you’ve seen?

For me it was 7.3 mls/kwh which was after a short 2.8 mile journey.

 

[Rolfe]

You can max out the readout if you start at the top of a hill. I think someone did that and reported something like 20 miles/kwh.

 

[Waterstoney]

My highest number is 4.8 on ZS LR for 600 miles in summer.
5.4 is for two return trips of total 150 miles.

 

[TerryN]

Yeah I've seen a 20 miles/kWh when setting off on a journey which was all downhill for the first few miles

 

[wattmatters]

Infinite.

 

[AlC]

I briefly had -15kWh/100km when driving down the mountain after taking the kids to the snow. Ended up with 1% more battery than I started too.

The problem with the UK (distance/energy) measurement is it can't display negative energy use

 

[DixieTGS]

For kWh/100km display, energy itself can't be negative in everyday use but the display is actually showing battery energy change / distance so that's OK.

The same should be the true for m/kWh (distance / battery energy change), but displaying negative miles / kWh would seem a bit wrong the first time you read it. So even though it would convey useful information I can see why they kept it positive. Displaying infinity for the case of 0 overall energy use is not ideal either.

 

[wattmatters]

Displaying infinity for the case of 0 overall energy use is not ideal either.

Displaying infinity for economy is not unusual in some older ICEVs which had those analogue fuel economy gauges. As soon as you coasted and fuel injectors stopped supplying fuel the gauge moved hard to the one side indicating infinite fuel economy. When you stopped it would go to zero as fuel was being consumed without moving.

 

[jammamon]

Other than long downhill country roads, my best in city was 5,4 KWh/100km in 10km distance. It was a bit downhill though.

 

[Alb]

Displaying infinity for economy is not unusual in some older ICEVs which had those analogue fuel economy gauges. As soon as you coasted and fuel injectors stopped supplying fuel the gauge moved hard to the one side indicating infinite fuel economy. When you stopped it would go to zero as fuel was being consumed without moving.

IIRC my petrol car displays consumption in gallons per hour when stationary.

 

[wattmatters]

IIRC my petrol car displays consumption in gallons per hour when stationary.

Yeah, there are/have been all sorts of fuel consumption displays in ICEVs. Many have range estimates as well. With multipurpose digital displays the units could be changed to suit.

 

[Rolfe]

I had an MFD in my old Golf, and I think it topped out at 400 mpg when the car was being towed. I used to watch its GOM a lot, and got wise to the lies it was telling me. 550 miles? No I really don't think so.

 

[dsimpkins]

You can max out the readout if you start at the top of a hill. I think someone did that and reported something like 20 miles/kwh.

Yes, I see that daily on drive home from work. Highest on a longer normal journey was 5.4.

 

[wattmatters]

I had an MFD in my old Golf, and I think it topped out at 400 mpg when the car was being towed. I used to watch its GOM a lot, and got wise to the lies it was telling me. 550 miles? No I really don't think so.

I had a trip once, filled up at the start, then after the first 267 km:

Estimated range remaining:

It wasn't too far out, still had half a tank remaining after 630 km.

 

[Rolfe]

I never saw more than 450 miles, full to empty, on that Golf. Usually more like 400 miles.

 

[wattmatters]

I never saw more than 450 miles, full to empty, on that Golf. Usually more like 400 miles.

Mine's a 2 litre MKV TDI.

 

[Rolfe]

Mine was a 2 litre (I think) Mk6 GTi.

 

[wattmatters]

GTi

That explains it.

 

[dsimpkins]

Had a Mk6 2.0 GT TDI and that would do around 400 miles to a tank with normal commuting. Average was about 40mpg round town usually. My wife could beat me on the GOM on the Golf, as well as the MG.

 

[Kithmo]

The best I've seen is 6.3m/kWh over a distance of 2 miles, then I had to go up a short steep hill and it dropped to 4.