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How to calculate the Ecoscore for retrofit vehicles?

In the Belgian fleet, the share of diesel cars continues to increase, while the share of petrol and LPG vehicles keeps on falling. Just like cars with an electric motor, vehicles on natural gas (CNG) constitute a minority in Belgium. Obviously, these trends are also evident from the composition of new and used car registrations.

In order to reduce the environmental impact of an existing vehicle one can convert the engine to enable it to run on an alternative fuel. In this case we primarily think of a conversion of a vehicle to enable it to use an alternative fuel such as CNG, LPG, PPO, biodiesel or E85 (more information on these fuels can be found here).

A study of VITO and VUB revealed that the Ecoscore will increase significantly as a result of all these modifications, except with the application of biodiesel.

A petrol vehicle that is converted to CNG will see its Ecoscore climb by no less than 10 units, on average. A conversion to LPG causes a slightly smaller benefit, although the improvement is still +8 units, on average. The researchers involved in this study were not able to estimate the impact of the use of PPO on the Ecoscore, due to a lack of data regarding the indirect emissions of this fuel. Diesel vehicles that run on biodiesel do not observe a rise of their Ecoscore, quite the contrary. This decline is largely attributable to deteriorated indirect emissions, with a great influence on air quality. Depending on the raw material used in the production of bioethanol (sugar beet or cane) in E85, the impact on the Ecoscore is either very large (+18) or giant (+23), respectively.

last database update: 12/05/2022 - next database update planned for: 15/07/2022
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