Pressure Washer Pump Oil Substitute

Due to their non-detergent formulations, which distinguish them from conventional engine oils, pressure washer oils are used to avoid damage to pressure washer pumps. 

Pressure washer pump oils contain anti-rust and anti-aeration characteristics and are used to lubricate the pump’s working components to prevent friction buildup. Both gas and electric pressure washers need the use of pressure washer pump oils.

So, is there any pressure washer pump oil substitute, and what do you need to pay attention to?

Scroll down to find out!

Pressure Washer Pump Oil Substitute for Pressure Washer

  • All-Purpose Engine Oil

All-purpose motor oil is a good choice if you’re using your pressure washer in temperatures above 40 degrees Fahrenheit. You should use the SAE30 oil in this case. However, if the temperature drops below 40 degrees Fahrenheit, the 10W-30 kind will start your machine better.

As a result, it’s critical to determine the temperature of your region before applying any sort of oil. In addition, it’s important to remember that using improper oil might lead to excessive oil consumption. Also, don’t forget to read the owner’s handbook, which will tell you which oil to use based on the temperature.

  • Non-detergent Oil

Pump oil can help some washers work considerably better. However, you might wish to use a non-detergent oil with a 30W rating. This sort of oil can protect the bearing’s surfaces against contamination.

Non-detergent oils cling to the valleys and sidewalls of your unit’s engine, trapping impurities. As a result, it will prevent residue from accumulating on the mechanism’s working surfaces and obstructing its operation. Even before oil filters were widespread, non-detergent oils were commonly utilized. However, before the widespread use of oil filters, they were mostly preferred. There are a few options if you’re seeking this type of pump oil.

  • Synthetic Oil

There are various synthetic oils on the market today, many of which are pressure washer pump oil equivalent. It protects in all weather conditions. At the same time, it reduces oil consumption while also boosting the engine’s or pump’s starting power.

Differences Between Engine Oil And Pump Oil

Non-detergent Pump Oil Vs. Detergent Engine Oil Detergent

Because it has an oil filter, a modern engine utilizes detergent oil. The detergent oil cleans impurities from the engine’s surfaces, and the oil filter filters them out of the bearings. When you use detergent oil without an oil filter, contaminants accumulate, and the oil becomes filthy quickly. To avoid excessive wear and probable failures, you’ll need to replace the oil often.

There is no oil filter on a pump. As a result, the pressure washer pump oil type is non-detergent oil. When you put detergent oil in a pump, all of the contaminants that it removes from the surfaces will flow through the oil. Wear within the pump is increased as a result of this.

Additives To Prevent Foaming And Aeration

What kind of oil is for the pressure washer pump? Anti-foaming and anti aeration additives are used to keep air out of oil. Air will be present in any pump and pump oil system; nevertheless, air can become an issue in oil when the following events occur:

  • Aeration creates air bubbles in the oil, which can cause pump cavitation (unwanted chattering/vibration of the pump moving components) and oil viscosity loss (not lubricating properly because of too much air).
  • Foaming isn’t generally a huge deal. However, because foam lies on top of the oil surface, it can foam over, increasing pressure and oil leaks. So why not just decrease the foam with a simple additive?

9 Easy Steps to Change Pressure Washer Pump Oil for Pressure Washer

  • To begin, clean the pump of any impurities. Then, connect the pressure washer to the water source and turn it on.
  • Start the engine and spray a continuous stream of water using the trigger. Hold the position for another two minutes.
  • Turn off the washer and unplug it from the water source after cleansing the system. Place a pail or bucket beneath the oil drain cap on the pump.
  • Drain the gasoline and oil from the engine before replacing the oil.
  • The oil cover on the water pump should be removed. Depending on the model, an Allen wrench may be required to remove the cap.
  • Reinstall the drain cap and fill the pump with oil. Replace the oil cap and use a cloth to clean away any excess oil. Now you may use the pressure washer.
  • To determine how much oil to add to the pump, follow the recommendations in the user handbook. Pre-measured bottles are also available.
  • Remove the drain plug and tilt the pressure washer with the cap off. Drain the oil until it stops pouring into the pan or bucket.

Check out this video if you want to watch the process directly: Pressure Washer Water Pump Oil Change

When To Replace Pressure Washer Pump Oil for Pressure Washers

After the first 50 hours of usage, you should change the oil in your new pressure washer. Following that, you should change the oil every 100 hours of labor or every three months, whichever comes first.

Most triplex pumps include a sight glass, often a circle with a dot that indicates how much oil should be present. If the oil level is below the dot, your pump requires more oil; nevertheless, draining and pouring new oil is far safer than simply adding a little. Whether your pressure pump doesn’t have a sight glass, see if it has a dipstick or if the user manual suggests a certain amount of oil pour into it.

If the oil is leaking (after identifying and correcting the problem), or if it has a milky hue, you should change it.


That’s all the essential information you’ll need to select the ideal pressure washer pump oil substitute. Maintaining the machine regularly is critical to ensuring that it continues to work at its best. Changing the oil in your pressure washer is only one of the many critical jobs you should complete, but it’s straightforward: To do it properly, all you need is a bottle of well-fitting oil and a little time every three months.

We hope this guide addressed all of your questions and that you chose an excellent oil for your pressure washer among our recommendations. Good luck!

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