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On-Road Diesel

On-road diesel is also referred to as clear diesel because it is transparent. It is the type of diesel dispensed at gas station retailers. Vehicles that are licensed to be used on roads in most states are required to use on-road diesel fuel. On-road fuel is sold with no dye added, and the general public can access it easily. Types of vehicles that use on-road diesel include SUVs, trucks, and cars using the road on a daily basis.

On-road diesel, also known as ultra-low sulfur diesel, doesn’t exceed 15ppm of sulfur content. Using this type of fuel eliminates adverse impacts on engines and your vehicle in general. The fuel can be used for multiple applications, but it is recommended that you should use and look for the appropriate on-road fuel to stay compliant with policies and regulations. On-road diesel is taxed, thus making it more expensive than the other type of diesel: off-road.

About Diesel Engines

The diesel engine was invented in 1893 by a man named Rudolph Diesel. The original design of a diesel engine was to run on peanut oil. While the efficiency of a gas engine is 25-30%, the diesel engine was designed to run at 50% efficiency to save fuel.

You’ll see a big red flag from us if you are putting gasoline in a diesel engine. The engine will not work or it will ignite at the wrong time. The consistency of diesel fuel is more like oil, which is where the term of oil burner comes from. There is less vapor pressure in diesel engines and the compression ratio is 18:1- lower than gasoline engines. How diesel fuel is ignited is different, as well. With a gas engine, a mix of air and fuel is drawn in, but in a diesel, only air is drawn in the cylinder and is compressed. The air temperature in a diesel engine can exceed 550 degrees Fahrenheit. The fuel injector then squirts a shot of diesel fuel into the cylinder, and because the air is so hot, it ignites the fuel. This process is similar to a violent explosion instead of a controlled burn like gasoline – explaining why diesel engines are louder than gas engines. A diesel engine is just a fancy air pump: the more air you get in and out of the engine, the more power you make.