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Malcan Greentec’s Diesel+ is a multifunctional additive which has been designed for use in all diesel trucks, buses and passenger vehicles to increase the cetane number, the indicator of the combustion speed of diesel fuel and the compression required for ignition. Diesel+ was designed to aid cleaning of the nozzles and injection line and reduce emissions.

The test cycle was made up of extra urban, rural and urban elements, which were each repeated up to 8 times in both baseline and experimental states.

The extra-urban cycle was 15.4 minutes in duration over 26.4 km at an average speed of 101 km/h. The urban cycle was 8.2 minutes in duration over 3.9 km at an average speed of 29 km/h. The rural cycle was 14 minutes over 13.0 km at an average speed of 56 km/h. The vehicle was fuelled with standard forecourt EN590 diesel. The following formula for adding in Diesel+ was applied: 40ml Diesel+ per 10 litres of diesel, thereafter 280ml of Diesel+ was used for the test vehicle’s 70 litre fuel tank.

Prior to testing, the following mileage accumulation was concluded. The first tank was run for 702 km with 280ml of Diesel+ additive. The second tank, also with 280ml of Diesel+, was driven for 497 km which left just over a quarter of a tank of fuel remaining.

This project was initiated to measure the emission benefits of Diesel+ when added to standard market diesel.

There was a significant reduction in PN of 59% when the Diesel+ additive was applied. There was also a substantial decrease in CO of 11%.


Emissions Analytics conducted on-road tests of a Mercedes Benz C220 diesel, to determine the real-world emissions before and after the deployment of Diesel+, Malcan Greentec’s multifunctional diesel additive.

A PEMS system was used to collect real world emissions data for the following gasses:

• CO2
• CO
• NO
• NO2
• PN

The requirements for this project were defined as:

• One Euro 4 diesel car
• Real-world test route around Stokenchurch, Buckinghamshire, UK
• Using Emissions Analytics’ SEMTECH-LDV
• Emissions Analytics to supply the vehicle and apply the additive as per the specifications
• Emissions Analytics to analyse data and present significance tests

The tests were successfully completed between 4 and 7 December.

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May 2019

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