4 Tips for Maintaining a Diesel Engine

Vehicles across many industries have diesel engines. This is because they are more economical on fuel and can handle more stress than an internal combustion engine. Despite how tough a diesel engine is, it isn’t invincible and still needs TLC.

Oil and Oil Filters

A good rule of thumb is to do an oil change after every 5,000 miles, but factors like climate, workload and oil type may mean you have to do it in as little as 3,000. 

Air Filters

Some smoke is to be expected but thick black plumes or fire are a warning sign your air filter is way overdue for a change. It’s not just bad for the environment, it’s bad for your engine, leading to soot build-up and a decrease in power and fuel efficiency. 


Diesel vehicles are more likely to have condensation than those with internal combustion engines. It’s a good idea to install a fuel water separator to prevent corrosion and all the problems that come with it. 

Make sure your primary and secondary fuel filters are changed at least every 10,000 miles, and that you are always using the right class of fuel for your engine. If your vehicle isn’t going to be used for a while, consider adding a stabilizer to your tank to prevent sludge build-up.


Have one brand of coolant you use and stick to it. Different coolants are made with different chemicals and mixing them can gum things up. However, unless it is an absolute emergency, do not use water as a coolant or an additive to top off your tank. It doesn’t work anywhere near as well as chemical agents and can result in damage to your engine.

Diesel engines may need a little more work, but they’re highly effective and highly efficient. If you take care of your diesel engine, it will take care of you.

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