Why Diesel Exhaust Fluid?
As governmental regulations on emissions from diesel engines become more severe, it has forced vehicle manufacturers to evaluate and adopt new technologies in order to be compliant with the more stringent emission standards effective January 1, 2010.
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EPA Emissions Requirements

2010 Emissions Standards for North America NOx.........................................0.2g/HP-hr Particylate Matter..................0.1g/HP-hr This is a 98% reduction since the late 1980's.

UNDERSTANDING DEF

In order to meet the demands of EPA 2010 standards, commercial vehicle manufacturers have evaluated various engine technologies that will provide low emissions and increased performance. SCR technology or Selective Catalytic Reduction is the option many engine and truck manufacturers have chosen. In simple terms, a fine mist of emission fluid is dosed into the exhaust that reacts and neutralizes the NOx molecules. A separate tank is fitted on the SCR truck to house the DEF. The rate of consumption for the fluid is 2 to 4% per gallon of diesel fuel. Manufacturers estimate that refilling of the DEF tank will occur every other diesel fuel fill up. ppc lubricants lubricant diesel exhaust fluid

DIESEL EXHAUST FLUID - DEF (Urea)

Diesel Exhaust Fluid (DEF) is an operating fluid for Selective Catalytic Reduction (SCR) technology, which will be in new heavy duty commercial vehicles from 2010. DEF is not a fuel or fuel additive; it is injected into the exhaust system to chemically reduce NOx emissions from diesel powered vehicles. DEF is a high-purity urea solution complying with the Standards of ISO 22241. This is the highest quality and safety standard in place which ensures the correct functioning of Selective Catalytic Reduction equipment. Most engine manufacturers chose SCR over competing technologies due to the fuel economy benefits of SCR as compared with other options. SCR is expected to improve overall fuel economy by approximately 5%.