Did you know diesel engine manufacturers have modified their engine designs in order to meet new EPA specifications for reduced emissions? This is a good thing because it means better efficiency and cleaner air for our environment, but it also means we need to change the way we think about our fuel. If you own a new diesel vehicle – or are in the market for one – here are a few things you should know:
Diesel fuel engines burn hotter and operate under extreme pressure
Newer engines operate under higher temperatures and pressures than ever before. Imagine the entire weight of an 18-wheeler … put within one square inch (about the size of a postage stamp). That gives you an idea of the amount of pressure going through a single fuel injector.
Under extreme pressure, the temperature of fuel increases. The result of the extreme pressure and heat can literally “cook” typical #2 diesel fuel, resulting in fouled fuel that re-circulates in the fuel system. This leads to a number of problems, including injector failure, clogged filters, reduced efficiency, power loss, poor starting, costly repairs and even engine failures.
Fortunately, there’s a solution. Cenex® Premium Diesel Fuels are specially formulated with an additive package designed for new fuel systems. Users who have made the switch from a standard #2 diesel to a Cenex Premium Diesel report that it’s effective at eliminating the problems mentioned above. (For more information, visit cenex.com/roadmasterxl.)
There may be an “extra” cap next to your fuel tank
That extra cap near the fuel tank is for Diesel Engine Fluid (DEF), an operating fluid required by Selective Catalytic Reduction (SCR) systems. DEF is injected into hot exhaust as a fine mist and passes over a catalyst, to convert NOx (nitrogen oxide) emissions into nitrogen gas and water vapor – effectively reducing NOx emissions to the levels required by EPA.
A clear, odorless solution of urea and water, DEF is not explosive, flammable, toxic or subject to any hazardous product regulations. DEF is increasingly becoming available at public fueling stations, truck stops, automatic filling stations, chemical distribution depots and truck dealerships; its shelf life is about 12 months.
-Neil Hoff, CHS Manager of Product Marketing for Refined Fuels