BlueDEF PLATINUM (R) with Advanced SYSTEM SHIELD™ Technology is a groundbreaking premium Diesel Exhaust Fluid with a proprietary formula to tackle deposits that can build up in the SCR system. Through continual use BlueDEF PLATINUM with Advance SYSTEM SHIELD Technology reduces future deposits that build up in your diesel exhaust system. These deposits create back pressure which can increase fuel consumption and reduce engine power. Once residue collects it cannot be removed and over time can lead to the costly replacement of your SCR system.