A2
Engine Oils
(Background & Properties)
1 800 255 4417
www.castroldiesel.com/GPS
Industry Specifications
History
The drivers for change in diesel engine oils begin with Environmental Protection Agency
(EPA) regulations for exhaust gas emissions. As can be seen in the chart below, reductions in
particulate matter (PM) and nitrogen oxide (NOx) have occurred every few years since 1988.
To be able to meet ever tightening limits, engine manufacturers must change engine
designs. Design changes almost always put additional stresses on the oil, therefore calling
for new engine oil service categories. With PM and NOx now at very low levels, the next
exhaust emission regulation will be for the reduction of green house gases (GHG), especially
carbon dioxide (CO2). The CO2 limit will be fully implemented by 2017, and the process for
developing the next generation HD engine oil for low GHG engines has begun. This new
category, called PC-11, is currently being designed and tested, and will continue to evolve,
with the first API license target date of January 1st 2016.
FIELD TESTED. FLEET TRUSTED.
GPS-2014-1
© 2014 Wakefield Canada Inc.
