While most hybrids are said to use one to two litres of fuel per 100km, a study claims they need six litres on average
Plug-in hybrid electric cars (PHEVs) use much more fuel on the road than officially stated by their manufacturers, a large-scale analysis of about a million vehicles of this type has shown.
The Fraunhofer Institute carried out what is thought to be the most comprehensive study of its kind to date, using the data transmitted wirelessly by PHEVs from a variety of manufacturers while they were on the road.
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According to the study, the vehicles require on average six litres per 100km, or about 300%, more fuel to run than previously cited.
The scientists of the Fraunhofer Institute found that the main reason for the higher-than-stated fuel usage was due precisely to the fact that the PHEVs use two different modes, the electric engine and the combustion engine, switching between both. Until now it has been claimed by manufacturers that the vehicles used only a little or almost no fuel when in the electric mode. The studies showed that this was not in fact the case.
acreage is meant to give you an estimate of how much is it going to cost you, if it is off by 20% based on you doing now highway than the average, that’s fine.
but if it’s off by 100%? that’s useless.
also, averages only works if the data falls under a normal distribution. if you have people charging their cars at night, and others who don’t, that is not a normal distribution amd averages are useless
Averages don’t only work if data falls under a normal distribution. I can have two very non-Gaussian distributions for fuel usage of two vehicle types but one of them has much lower fuel consumption than the other, I can vouch for the lower one using the average alone.