Please check out pictures on the left, the car in question together with the official emission test results.
Please find below the original description added from the owner of that car:
“Audi A4 – diesel particulate emissions decreased after 2063 km by 48%
As a workshop manager of the building yard in Neulengbach, I had already found a clear reduction in the consumption of a truck MB Actros.
At my Audi A4 I was able to measure after 3 tanks of fuel with a rapid test that the coefficient of absorption has decreased after 2063km by 48%. The emission of the diesel particles has decreased within 2 weeks from 0.93 m-1 to 0.48 m-1, the consumption has decreased from 7.8 liters to 7.2 liters.
The equipment of our agricultural machines with the exhaust and fuel-saving pin has thus become highly recommended, first ranked the harvester! (2014)
Sincerely yours
Bernhard Zöllner”