Data released by Emissions Analytics has shed light on vans real-world fuel economy, which shows official figures are on average 17.1% lower than the official test figures given to customers/operators.
In the table below there is a sample of vans which have been tested on, all showing fewer miles per gallon than originally advertised. The average is 17.1% but varies massively from as low as -5.3%, right up to the Volkswagen Caddy Euro 6 model which is 38.8%.
All of the vehicles taking part in the test were homologated to either Euro 5 or Euro 6 engines, but there are seven Euro 5 engine vehicles and three Euro 6 engine vehicles which are rated ‘H’ meaning they emit twelve times or more the current Euro 6 limit according to the EQUA Aq Index.
However, overall the fuel economy gap is smaller than passengers who were recorded at 29% in 2016, which may be down to the fact light commercial vehicles are not being hyper-optimised to the NEDC, says Emissions Analytics.
Tested on the same EQUA cycle as passenger cars, vans additionally run parts of the route ballasted to 50% of their maximum payload.
The effect of load on fuel economy is an average of -11.2% for a fully loaded van.
Emissions Analytics says a quick calculation based on average diesel price (122.12 pence per litre) shows that for every 100 miles driven with a fully loaded van, refuelling costs on average £1.91 more than empty. Multiply this by the average yearly mileage travelled per van and this is approximately £450 per year.
With around 30 to 50 vans added yearly, the EQUA Index is available for everyone to use free of charge and enables drivers and fleets to pick the most economical, as well as the least polluting vehicles.