What Happens if You Put Gas in a Diesel Truck?

You’ve probably heard the saying, “Don’t put gas in a diesel truck.” But do you know why? What happens if you put gas in a diesel truck? This blog post will discuss the consequences of putting gasoline into a diesel engine. We will also talk about how to avoid this mistake and what to do if you accidentally put gas in a diesel truck.

It’s not advisable to put gas in a diesel truck because gasoline will not properly combust in a diesel engine. This can cause a few different problems. First, it can damage the fuel injectors. The gasoline will not ignite in the cylinders and can actually start to corrode the metal injectors.

Second, putting gas in a diesel truck can clog up the fuel filter. Gasoline is much thinner than diesel fuel and can easily get past the filter. Once the gasoline gets into the diesel fuel system, it will start to mix with the diesel and can clog up the injectors and fuel lines.

Third, putting gas in a diesel engine can damage the catalytic converter. The catalytic converter is responsible for converting harmful emissions into harmless gases. Gasoline will not ignite in the catalytic converter and can actually cause it to overheat.

So, those are a few reasons why you shouldn’t put gasoline in a diesel truck. If you accidentally put gas in a diesel truck, the best thing to do is to have it towed to a nearby service station. The technicians there will be able to drain the fuel system and flush it with diesel fuel.


What Do You Do if You Accidentally Put Gas in a Diesel Truck?

If you accidentally put gas in your diesel truck, you should first call for a tow truck to take your vehicle away from the gas station. The second thing you should do is have the tow truck take your vehicle to your local dealership or any trustworthy auto mechanic. The fuel tank will need to be completely drained, and the fuel system flushed out.

This process can be expensive, but it is necessary to avoid damaging your engine. If you have comprehensive insurance, your insurance company may cover some or all of the cost of the repairs. However, if you do not have comprehensive insurance, you will be responsible for the entire cost of the repairs.

How Long Will a Diesel Engine Run On Gasoline?

Diesel engines are built for durability and long-term use. In fact, they can run for up to 1,500,000 miles before needing major work. This is due to their design, which includes stronger internal components and a more efficient combustion process. As a result, diesel engines can handle higher loads and withstand more wear and tear than gasoline engines.

Additionally, they often require less maintenance and can go longer between tune-ups. As a result, you can expect your diesel engine to last significantly longer than your average gasoline engine. So if you’re looking for an engine that will give you years of trouble-free service, choose diesel.

Will 2 Gallons of Gas Hurt a Diesel Engine?

Diesel engines are designed to run on diesel fuel with a high flash point. Gasoline, on the other hand, has a much lower flash point. As little as 1% gasoline contamination will lower the diesel flash point by 18 degrees C. This means the diesel fuel will prematurely ignite in the diesel engine, which can lead to engine damage.

Gasoline contamination can also damage the fuel pump and mess up diesel injectors. In short, while a small amount of gasoline won’t do serious harm to a diesel engine, it’s best to avoid refueling with anything other than pure diesel.

How Much Does It Cost To Flush Diesel Out of Car?

If you’ve accidentally put diesel fuel in your car, you’re probably wondering how much it’s going to cost to flush it out. The good news is that in most cases, the process is relatively simple and won’t cost too much. Draining the tank is usually the first step, and this can cost anywhere from $200-$500, depending on whether the tank needs to be dropped and how much diesel is present.

If diesel fuel has entered the fuel line or engine, the repair job can easily climb into the $1,500-$2,000 range. However, if you catch the problem early, you may be able to avoid major repairs by simply flushing the fuel system with a cleaner designed for diesel engines. Either way, it’s important to act quickly to avoid further damage.

Does Insurance Cover Putting Gas in a Diesel Engine?

Every driver’s worst nightmare is at the gas station, filling up your car, and you realize you’ve put the wrong fuel in the tank. Maybe you were running late and grabbed the wrong nozzle, or maybe you were distracted and pumped diesel into your gasoline car by mistake. Either way, it’s a costly mistake that could damage your engine. So does insurance cover putting gas in a diesel engine?

Unfortunately, misfuelling is a common exclusion on auto insurance policies. Most insurance policies exclude any damages caused by the wrong fuel in your vehicle. Even if you have full coverage or comprehensive coverage, misfuelling is not likely to be covered. In some cases, your insurance company may waive the exclusion if you can prove that the misfuelling was an honest mistake and not due to negligence on your part. However, this is rare, and it’s always best to check with your insurer before making a claim.

If you find yourself with the wrong fuel in your tank, the best thing to do is call a tow truck and have your car taken to a nearby service station. They’ll be able to drain the tank and flush the system, hopefully preventing any lasting damage to your engine. And of course, the next time you’re at the pump, take a little extra time to ensure you’re putting the right fuel in your car. It could save you a lot of money in the long run.


If you have accidentally put gasoline in your diesel truck, don’t panic. While it’s not ideal, it’s not the end of the world either. Just be sure to act quickly and get your truck to a service station as soon as possible. And next time you’re at the pump, take a little extra time to make sure you’re putting the right fuel in your car. It could save you a lot of money in the long run.

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.