Diesel Oil Change

How Often Should You Change Diesel Oil?

There are huge differences between diesel cars, standard cars, and gas-fueled cars. This article explains how diesel oil change in a standard engine differs from a diesel oil change in a diesel engine and answers how often to change diesel fuel and why a lubricant change in a diesel engine should not be carried out independently.

Replacement frequency

It is generally accepted that the diesel oil change should be done every 3000 km or three months for gasoline cars and trucks by professional oil change service. But this does not necessarily apply to diesel vehicles.

How often do you need to do diesel oil change in a diesel engine? A passenger car or truck with an engines can run longer without an oil change than with a gasoline engine, depending on:

Where do you drive (climate and terrain)?

What do you do with your vehicle (for example, carry heavy loads often or tow a trailer)? Whether you choose a conventional, synthetic, or fully synthetic oil. Let’s say you make short trips around town and rarely drive at high speed. If this is the case, you may need to do diesel oil change in a diesel vehicle more often than in an engine, which is commonly used for highway driving.

Why? Because at lower speeds and temperatures, the diesel oil change in the engine builds up debris and dirt faster than it would if the car was driven at higher speeds and in hot weather.

Manufacturer’s Recommendation

Below is an example of a manufacturer’s recommendation for a 2018 Ford F-150 diesel oil:

  • Normal conditions for a diesel oil change: 7,500 – 10,000 km (1 year);
  • Moderate towing, idling: 5,000 – 7,000 km (6 months);
  • Heavy towing, high idle: 3000 – 5000 km (3 months).

In addition, Ford explicitly states that oil change intervals must NOT exceed 10,000 km or one year of driving without opting for the oil change service.

Diesel engine oil change

This process is no different from a standard diesel oil change. However, the type of oil used and the maintenance intervals differ.

Diesel oil change cost. A diesel oil change can often be more expensive than a standard diesel oil change because diesel fuel and lubricant for such a diesel engines are more expensive than mineral oil (conventional gas powered cars and oil cars). If the diesel engine accumulates gunk, then it requires oil changed immediately.

Changing diesel oil in a garage

While you can change the oil in your garage or driveway, we do not recommend doing this. Here are two reasons why you should entrust this procedure to professionals.


While you can save money by changing the lubricant yourself, you will not save time. You will also need to learn the steps and materials required, purchase those materials, buy the right diesel oil, change the oil, clean it up afterward, and properly dispose of the discarded oil with an oil filter. Plus, you’ll have to repeat almost all of these steps every time your vehicle’s diesel oil needs to be changed.


An diesel vehicle oil change by a professional makes it less likely that something could go wrong in your garage or your car since auto technicians are specially trained to use the correct oil – they are unlikely to make newbie mistakes such as using the wrong lubricant or leaking. After all, having a professional diesel oil change cost gives you peace of mind.

What happens if you are late with an oil change?

This is another task on your to-do list. You convince yourself that nothing will happen to the diesel powered car. You decide to wait until next week, maybe until next month, when life becomes easier, and you have a free minute. In addition, you ask the question: do you need to change the oil every 3000 km? If your oil is not changed on time, bad things can happen, for example:

Cancellation of vehicle warranty

One of the benefits of buying a new car is the peace of mind that comes with the warranty. However, if your vehicle has not been serviced to factory specifications, your warranty may be void.

Decreased engine performance

In addition to lubrication, motor oil also keeps your car’s engine clean. Detergents, dispersants, and other additives carry dirt and debris into the fuel filter, which is also changed during diesel oil changes. Once your filter gets clogged, all that dirt is forced to circulate through the engine.

Thus, even clean motor oil gradually becomes dirty sludge. The moving parts of your diesel engines have to cut through this filth, making it work harder. As a result, your car may lose torque. And the harder your engines works, the more fuel it will consume. If you have a gas powered car, you will have to stop at gas stations more often and spend your honestly earned money.

Complete engine failure

Drive long enough without changing the motor oil, and it could end up costing you your vehicle. Once the engine oil turns into sludge, it no longer draws heat from the engine. As a result, the diesel engine can overheat and either deflate the gasket or jam.

Milky white gasket exhaust

Straightening the blow head gasket is quite expensive and may not make sense for your vehicle, depending on its age. Why is this happening? If the gasket does not blow due to the high temperature, it will deform the parts of the diesel engine, and it will break. Such an engine usually only needs to be replaced, and it’s not hard to imagine how much it costs.

Without an oil filter, harmful particles can enter the engine oil and damage the engine. Debris filtering means your engine oil stays cleaner for longer. Cleaner oil means better engine performance.

How does an oil filter work?

Your oil filter doesn’t just filter waste. Its parts work together to cleanse the oil and keep it in the right place at the right time.

Components of the oil filter in diesel engines

Spill plate: Oil enters and exits the oil filter through a drain plate, which looks like a center hole surrounded by smaller holes. Engine lubricant passes through the smaller holes, through the filter media, and then flows to your engine through the center hole.

Filter material: The filter is made of synthetic fibers that serve as a sieve to trap sand and dirt in the engine oil. The material is folded to create a larger surface.

Rear anti-drain valve: When the motors are off, this valve is closed to prevent oil from leaking back into the oil filter from the engine.

Pressure relief valve: When it’s cold outside, the engine oil can thicken and break through the filter. The relief valve releases a small amount of unfiltered engine oil to give your engine a boost until it warms up.

End Discs: Two end disks on either side of the oil filter, made of metal or fiber, prevent unfiltered grease from entering the engine.

Of course, diesel oil change cost is not quite expensive. Follow recommendations of the manufacturer.

Change the fuel filter on a engine according to the car manufacturer’s recommendations only if you are 100% sure of the quality of the fuel that was poured into the car’s tank. If you are not sure, as a last resort, change the filter after one maintenance to avoid wrong oil, i.e., every 20-30 thousand km. But still, the best option would be to change it during each upkeep.

You should also carefully approach the choice of the filter itself and purchase products only from well-established filter manufacturers. Compliance with these simple rules will allow you to extend the service life of the fuel equipment and, accordingly, avoid spending during expensive repairs.

Wrapping up

One of the main conditions for the long-term trouble-free operation of a car with a diesel engines is timely maintenance. But even the regulations of automakers are often not designed for the conditions in which cars are used in our country.

Everyone knows that the quality of our fuel leaves much to be desired. But the fuel system of a diesel engines is very demanding on its quality, and in case of failure of system elements, the owner will have to pay a large sum for its repair. It is to prevent this situation that a fuel filter is needed. Its tasks include cleaning fuel from hazardous contaminants and water retention, which is detrimental to fuel equipment.

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