How many KM remaining depends on the terrain, traffic, driving technique, weather and a host of other factors. Nobody is expecting 100% accuracy just a rough estimate. They are already mentally doing the conversion anyways.
This is true -- my understanding is that Germany actually requires they never read low EVEN IF FITTED WITH THE WRONG SIZE TIRES which is sort of insane.
That said, I believe the odometers are typically bang on, which would mean the mileage calculation should be accurate. Or could be, if they wanted it to be.
> My 2016 ICE car's "miles left" meter is accurate to +/- 2 miles from the moment I top up the tank (80% highway driving, 20% hilly city and rolling country roads).
No way. That’d be accurate to under 1% - well within the variation you’ll get just from different air densities (temperature, pressure, humidity). Forget about A/C on or off, tire pressure, etc.
I did the calculation in Freedom Units and converted to grams per km. Assuming tires last 60,000 miles or 100,000km and got 0.1 gm/km. So matches your analysis closely.
Notable I put 60,000 miles on my cars tires since I bought it. They are due for replacement kind of whenever.
For example, when driving a long distance (150m+), it told me that I could have saved X miles if my tires were inflated another 5psi, and saved Y miles if I had used less cabin heating.
Or you can use some basic math, and calculate how much tire/breaks wears(loses original matter) per 100 000 km and how mach of gas a car burns for the same distance and compare these numbers.
I disagree.
First, the human mind is not that good at dealing with decimal and numbers between 0 and 1. My car is rated 4.5l / 100 km, which is easier to deal with than 0.045l / km.
For a simple calculation, say 5km, what the easiest 0.045 * 5 or (4.5/10)/2 ?
Secondly, a car is designed to be driven over distance, so making measurement on only one kilometer wouldn't be representative of real world usage.
I have my car set to display L/100km, but that's mostly because it's a hybrid and so kW/100km is more logical than the inverse and it makes sense to have them both operating the same way.
My previous car didn't have an economy reading anyway, so my only frame of reference before was calculating pence per mile rather than MPG. L/100km seems logical and I had got used to it in a matter of weeks. Mine is generally around 5-6L/100km on long, mostly petrol journeys, so this is now my new mental benchmark, and it's also trivial to go from this to pence per litre, and not much more to get to the pence per mile that I thought in before. I guess my brain has got good at multiplying by 1.6 as I use km for running and cycling too.
I've never heard anyone say that. Who are these people that are reading fuel consumption in their dashboard and doing the mental arithmetic to convert that to km/liter? I've only heard "my car spends about 5-8", meaning 5-8 l/100 km in casual conversation. I.e. the number you'd read directly from the dashboard.
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