Vehicles of different sizes from mammoth-like commercial trucks to off-road four-wheelers benefit from diesel. Diesel fuel goes by different names across the globe – DERV (diesel-engined road vehicle) in the U.K., distillate in Australia, and Solar in Indonesia, to name a few – and there is a widespread commercial use for its several types and blends. Similarly, there are different units used to measure it. While most countries have shifted to using liters to measure fuel in general, some places and groups of enthusiasts and mechanics still prefer the old-school gallon. Now, you may be expecting the value of a gallon to be a constant number, right? Unfortunately, it isn’t – or at least, it’s not that straightforward.

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How much does a gallon of diesel weigh?The weight depends on fuel grade and unit of measurement used. A U.S. gallon weighs 6.82-8.0 lbs. The U.S. dry gallon and imperial gallon weighs 7.93-9.32 lbs and 8.19-9.61 lbs, respectively. It is best to use the U.S. gallon when weighing your diesel.

Within this article, you will understand further not only cetane ratings and measurement variants but also other factors like temperature and scientific quality tests that affect how much a gallon of diesel fuel weighs.

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Different Types of Diesel

According to engineers and fuel specialists, the type of blend of diesel fuel, among other factors, may affect how much a gallon of diesel fuel weighs. And since we are determining the exact diesel fuel weight per gallon, it is crucial to understand its different classifications and weight-affecting properties.

There are three different diesel fuel classes: 1D, 2D, and 4D. The difference between them depends on viscosity (resistance of a liquid to flow), boiling point range, pour point (lowest temperature when a liquid substance will flow), and cetane rating. I went ahead and computed their pound equivalent per gallon based on their different densities (which I got from Engineering Toolbox), as follows: