How much oil goes in a Craftsman pressure washer?

When using a Craftsman pressure washer, it is important to add the proper amount of oil to allow the pump to operate smoothly. The oil quantity can vary slightly depending on the specific model of Craftsman pressure washer you have.

Quick Answer

Most Craftsman pressure washers require around 20 fluid ounces (or 2.5 cups) of pump oil. Refer to your owner’s manual to confirm the oil capacity for your particular Craftsman pressure washer model.

Factors That Determine Oil Capacity

There are a few key factors that determine how much oil to use in a Craftsman pressure washer:

• Pump size – Larger pump capacities need more oil. Smaller pumps need less.
• Pump type – Different pump designs have different oil requirements.
• Horizontal vs. vertical pump – Horizontal pump configurations may need a bit more oil than vertical designs.
• Age of pump – Older, worn pumps may need slightly more oil than new pumps.

With those factors in mind, most Craftsman pressure washers use around 20 ounces of pump oil. But checking the owner’s manual for your specific model is always the best way to confirm the proper oil capacity.

Oil Type Recommendations

Craftsman recommends using high-quality SAE 30W non-detergent oil in their pressure washer pumps. Here are some more details on recommended oil types:

• Non-detergent – Detergent oils can leave residue that clogs the pump over time. Use non-detergent oil only.
• SAE 30W – The 30 weight (or viscosity) is optimal for pressure washer pumps in most temperatures.
• High-quality oil – Don’t use old, dirty oil. Always use fresh, clean oil to protect the pump.
• Motor oil OK – Standard motor oils like 10W-30 are acceptable if non-detergent oil is unavailable.

Using the manufacturer’s recommended oil type will maximize the pump’s lifespan and performance.

Adding Oil to a Craftsman Pressure Washer

Adding oil to a Craftsman pressure washer involves just a few simple steps:

1. Make sure the pressure washer is cooled and disconnected from any water source.
2. Locate the oil fill port on the pump. It will be marked and have a threaded plug or dipstick.
3. Remove the plug/dipstick and set it aside.
4. Using a funnel, add the appropriate amount of oil into the fill opening. Around 20 oz (2.5 cups) is standard for most models.
5. Replace the oil fill plug securely when finished.
6. Check the oil level using the dipstick to confirm you added enough.

Adding too much oil can cause leakage or damage. Be careful not to overfill the pump reservoir. Too little oil can lead to pump failure from lack of lubrication. Refer to your owner’s manual for detailed oil fill instructions.

How Often to Change the Oil

Here are some general guidelines for how often to change the oil in a Craftsman pressure washer pump:

• Change oil before initial use – New pumps are tested at the factory but the oil needs changing.
• Change oil after first 20 hours of use – Break-in period requires the initial oil to be changed.
• Change oil every 100 hours after – Helps flush contamination and maintain protection.
• Change oil annually – At least once a year, even with minimal use.
• Change oil when contaminated – Replace oil that looks dirty or contaminated.

Again, check your specific owner’s manual, as they may recommend slightly different oil change intervals, depending on the pump model.

What Oil to Avoid in Pressure Washers

Here are some types of oils you should avoid using in a Craftsman pressure washer pump:

• Detergent oils – Leavesticky residue.
• SAE 10W oils – Too thin for pressure washers.
• Thick oils (SAE 50+) – Won’t flow properly in the pump.
• Vegetable or bios oils – Can gum up and clog pumps.
• Used motor oil – Contaminants and additives can damage seals.

Any oil with detergent additives or not rated for pump use can cause problems. Stick with a high-quality, non-detergent, 30-weight oil specifically designed for pressure washers.

Signs Your Pressure Washer Needs an Oil Change

Here are some signs that it may be time to drain and refresh the oil in your Craftsman pressure washer:

• Leaking oil
• Noisy operation from pump
• Loss of water pressure
• Sluggish startup
• Dirty/contaminated oil
• Annual maintenance due
• Excessive vibration
• High operating temperatures

Any unusual noises, leaks, changes in performance, or visual contamination indicate it’s time for new oil. Follow the oil change intervals recommended by the manufacturer.

Can You Use Other Oil Types in a Pressure Washer?

While it’s not recommended, you can use other oil types in a pressure washer pump if absolutely necessary:

• 10W-30 Motor Oil – Common motor oil can substitute if non-detergent isn’t available.
• 5W-30 Synthetic – Thinner synthetic oils work if ambient temps are hot.
• 15W-40 Diesel Oil – Works but not optimal. Short-term only.

Avoid thicker oils like 10W-40 or 20W-50 as they may not flow properly. Also avoid bios oils, vegetable oils, or oils with friction modifiers or detergents.

While other oils may work briefly, frequent oil changes will be needed. Non-detergent 30W oils specifically made for pumps are highly recommended for best performance and longevity.

Storing Oil for Pressure Washers

Proper oil storage helps prevent contamination and maintains freshness. Here are some tips for storing oil for pressure washers:

• Use only clean, sealed containers, drums or tanks.
• Store in cool, dry location away from moisture, sunlight and extreme temps.
• Clean containers before refilling to remove any contaminants.
• Keep oil isolated from gas, diesel, solvents etc. to prevent mixing.
• Label containers clearly with oil weight, type and date.
• Limit inventory and rotate stock to use oldest oil first.
• Check stored oil periodically for any visible contamination.

Properly stored oil can last up to 1 year before needing to be refreshed. Discard any old, dirty oil or oil from open, unlabeled or compromised containers.

Disposing Used Pressure Washer Oil

Be sure to dispose of used pressure washer pump oil properly:

• Do not dump down drains, sewers or directly on the ground.
• Do not mix with gasoline, solvents or other fluids.
• Store in sealed containers prior to disposal.
• Check local recycling centers – some accept used oil.
• Bring to auto garage or oil change shops to recycle.
• Consider using a hazardous waste disposal company if necessary.

Polluting the environment with used oil comes with major fines and penalties. Always dispose safely at approved recycling facilities.

Key Takeaways

• Most Craftsman pressure washers need around 20 oz (2.5 cups) of high-quality SAE 30W non-detergent oil.
• Check your owner’s manual for exact oil capacity and recommendations.
• Add oil carefully to avoid overfilling the pump reservoir.
• Change oil regularly every 100 hours max. and always before initial use.
• Store oil properly in clean, sealed containers and dispose used oil safely.

Following Craftsman’s oil recommendations will maximize your pressure washer’s performance and life. Proper oil changing and disposal prevents damage and pollution.

Conclusion

Choosing the right oil type and keeping oil fresh is vital to pressure washer pump operation. Craftsman washers need approximately 20 ounces of SAE 30W non-detergent oil. Refer to your model’s manual for exact capacity and procedures. Change oil regularly, at least annually, to prevent sludge buildup. Always store and dispose oil properly as well. Following these best practices will extend the lifetime of your Craftsman pressure washer and ensure optimal performance.