The emission factors indicate the quantity of emissions released in relation to the amount of fuel consumed. They are based on emission certification ratings that have been subjected to simulations.

Make estimations…
It is important to remember that these results are not definitive. They do not take into account inadequate maintenance such as blocked air filters or tuned engines. It is therefore necessary to make a case-by-case assessment as to how the results are presented and used. Note that the figures are valid for Scania engines only.

…based on fuel consumption
Using fuel consumption as a basis, a haulage firm can calculate the amount of emissions for a given transport assignment.

1. Select the relevant engine generation (Euro 1, Euro 2 or Euro 3 engine) in the table.
2. Multiply the emission factor by the number of litres of fuel consumed.
3. The resulting figure represents the emissions in grams. To obtain better result precision, this procedure can be applied to all transport assignments over a period such as a month or a year instead of a single transport assignment.
   

Example:
You have completed an assignment. Your truck has used 867 litres of diesel fuel. Now your customer wants to know the NOx emissions resulting from this assignment. Your truck has a 12-litre Euro 3 engine and you are running on low-sulphur diesel fuel. Looking under NOx, Euro 3 engine and low sulphur you will find that the emission factor is 19 grams NOx per litre of low-sulphur fuel. The calculated emissions are thus: 16 grams NOx per litre x 867 litres = 13,870 grams ~ 14 kg.

…based on accumulated transport volume
Basing the calculations on the transport volume, that is to say the amount of load actually carried (g/tonne-km), a transport operator can calculate the total emissions for a given assignment. Note the considerable effect of an empty or almost empty truck on the emission factor!

1. Select the relevant engine generation (Euro 1, Euro 2 or Euro 3) in the table below. 
2. Multiply the emission factor by the total load carried.
3. The resulting figure is the amount emissions expressed in grams.