Changing Your Pump Oil


As I always say, the pump is the heart of your pressure washer. You need to take care of your pump in order to get the most out of your pressure washer investment. Especially in these tough economic conditions!

pressure washer pump oil

Making sure you have good lubrication is the absolute easiest and best preventative maintenance you can give your pump!

If your pressure washer is new, most manufacturers recommend that you change your oil within the first 15-20 hours, or after 3 months, whichever comes first. After that, I would recommend changing every 200 hours, or at least once a year. Personally, I change mine a little more often since I use my pressure washer frequently.

axial cam pressure washer pump If you have a pump like mine, you can check your pump oil level by simply looking in the window (sight glass) on the side of the pump. You’ll see a red dot on the oil pump window, indicating that you should fill the pump oil only half-way to the red dot. Never over-fill pump oil!

Of course, if your pump oil looks milky, change it! Your owners manual should give you good instructions and make recommendations on pump oil.

Do NOT use engine or motor oil in your pump! You’ll quickly ruin your pump.

Only use pump oil that’s specifically formulated for use in a pressure washer. The pressure washer pump oil that you choose should be non-detergent and non-foaming with anti-rust inhibitors.




If you're having problems with your pump, check out my replacement and repair tips at the Pump Replacement and Repair page.

If you need repair and servicing for your pressure washer, here's my handy list of authorized and local repair centers.



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