Oil is a major component of pressure washer pump, and if you don’t use the right oil, your pump could be damaged. While there are many oils that can be used in pressure washers, it’s important to choose one that is made specifically for pressure washer pumps.
Pressure washer pumps are often associated with a particular manufacturer or type of machine. When purchasing a new pump, make sure you know which is appropriate for your machine. Some pressure washer pumps are designed specifically for electric pressure washers only and not safe for gas-powered machines.
High-quality oil is essential for maintaining the life of your best pressure washer pump. Without it, you can expect to see shorter lives for your pumps and increased wear on the parts inside.
But what oil should you use?
The type of oil you choose depends on a number of factors — including your brand of pressure washer; what kind of chemicals are in your cleaning solution; the materials your pump is made out of; and the particular sequence of events (such as washing) that take place when you use your pressure washer.
There’s no right or wrong answer here. But if you’re considering a new washer, consider asking the dealer what oil they recommend. If they don’t know, ask a knowledgeable neighbor who might have some experience with the equipment in question.
If you have an older model, consult the manual or ask someone at your local power tool store about using an oil that fits the manufacturer’s recommendations. Most manufacturers’ recommendations are pretty standardized, so it shouldn’t be hard to find one that’s compatible with the machine and correct for its specific operating conditions.
Avoid using oils mixed with gasoline or other fuels because they can damage your pump. Oil mixed with other liquids such as grease can also lead to pump failure.
Factors to Consider When Choosing an Oil for Your Pressure Washer Pump
- Price
Oils aren’t necessarily cheap or expensive; they just vary in price based on factors such as brand name and quality. If you’re buying an oil for a power tool or another type of engine that has to be changed out regularly, it might be worthwhile to spend a little more money on an oil with better performance, even though it costs more.
- Chemical composition
Most water-based pressure washer oils are made of petroleum distillates, which tend to have higher evaporation rates than synthetic oils, which allows them to flow at lower temperatures (in cold weather). On the other hand, some “hard” oils have higher viscosities (thickness), which can result in clogging inside your machine.
- The kind of pressure the engine puts out
Not all oils are designed for high-temperature use, so make sure yours is a match for your application.
- The amount of motor oil you need
If you’re pumping at full bore, you’ll need more than if you’re only pushing a little bit at a time.
- Your frequent activity using the pump
Most pumps are rated by hours or miles per gallon, not necessarily gallons per minute (GPM). In general, a 1HP pump needs about one quart of oil every 3,500 to 6,500 miles; 2HP pumps need 2 quarts every 2,500 to 5000 miles.
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