What is AdBlue? AdBlue is a diesel exhaust fluid (DEF) mixture used in all heavy-duty diesel engines produced after January 1st, 2010. With most commercial vehicle and car diesel engines made after September 2015 – primarily Euro 6-compliant models. AdBlue® is not a fuel additive as it’s added to the exhaust gas after combustion has taken place.   AdBlue® reduces Nitrogen Oxide (NOx) emissions. … Continue reading AdBlue