Can You Use Regular Diesel in a Biodiesel Truck?

If you own a biodiesel truck, you may wonder if you can use regular diesel. The answer is yes, but there are some things you need to know before doing so. In this blog post, we will discuss the pros and cons of using regular diesel in a biodiesel truck and provide tips on how to make the switch without causing any damage to your vehicle.


Biodiesel vs. Regular Diesel

Biodiesel is a renewable, clean-burning fuel from plant oils and animal fats. Regular diesel, on the other hand, is made from petroleum. The two fuels have different properties because of their production process. Biodiesel has a lower carbon content than regular diesel, producing fewer emissions when burned. Biodiesel also has a higher octane rating than regular diesel, which can improve fuel economy.

Compatibility and Modifications

Biodiesel can be used in any diesel engine with little or no modifications. However, biodiesel can gel in cold weather, so you must use a winterized version of the fuel if you live in an area with cold winters. Some older trucks may not be compatible with biodiesel, so it’s essential to ensure your truck’s fuel system is compatible with biodiesel before switching.

Switching to Biodiesel

Suppose you’re thinking of switching to using biodiesel in your truck. In that case, you must research and talk to a qualified mechanic first. Biodiesel is a renewable, clean-burning fuel that can improve your fuel economy. However, it does have some disadvantages. Biodiesel can gel at low temperatures, making it difficult to start the engine in cold weather, and may cause premature wear of some engine components.

Engine Types and Biodiesel Compatibility

There are two main types of diesel engines: indirect injection (IDI) and direct injection (DI). IDI engines cannot use biodiesel fuel because the injectors are in the cylinder head. This means the biodiesel fuel would contact hot metal surfaces, causing it to break down and produce deposits. DI engines are newer and use a different injector system resistant to this problem. As a result, all DI engines can use biodiesel fuel without any issues. However, some manufacturers have started adding warnings against using biodiesel in their vehicles, and it’s essential to read these warnings carefully before using them.

Potential Effects on Your Truck

Biodiesel may cause premature wear of some engine components, so you must check with your engine manufacturer before using biodiesel in your truck. Many manufacturers recommend a maximum blend of 20% biodiesel (B20) for their engines, and some engines may not be compatible with biodiesel. By following the manufacturer’s recommendations, you can be sure your truck will run smoothly and efficiently for years.


Using regular diesel in a biodiesel truck is possible. Still, it’s essential to know the differences between the two fuels and their compatibility with your truck’s engine. Biodiesel has several advantages over regular diesel, including renewable and environmentally friendly. Still, it does have some disadvantages, such as gelling in cold weather and potential premature wear of engine components. Always research and consult a qualified mechanic before making any changes to your truck’s fuel system.

About the author, Laurence Perkins

Laurence Perkins is the passionate car enthusiast behind the blog My Auto Machine. With over a decade of experience in the automotive industry, Perkins has knowledge and experience with a wide range of car makes and models. His particular interests lie in performance and modification, and his blog covers these topics in-depth. In addition to his own blog, Perkins is a respected voice in the automotive community and writes for various automotive publications. His insights and opinions on cars are highly sought-after.