When it comes to selecting the right oil for your gas pressure washer, it is crucial to choose the correct type to ensure optimal performance and longevity. This comprehensive guide will provide you with detailed recommendations, technical specifications, and essential tips to help you maintain your pressure washer’s engine and pump effectively.
Recommended Oil Types
- SAE-Rated High-Detergent Oil:
- Generac recommends using an SAE-rated high-detergent oil for their pressure washers.
- These oils are formulated with advanced detergents and dispersants to keep small engines clean and prevent sludge buildup.
- They typically have an SAE viscosity rating of 30 or 40, providing the necessary lubrication and protection for pressure washer engines.
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Examples of suitable high-detergent oils include Generac’s Synthetic Blend 5W-30 Engine Oil (part number G0056370) and Honda’s GC/GCV Series 10W-30 Engine Oil.
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Detergent-Free SAE30 Oil:
- For the pressure washer pump, a detergent-free SAE30 oil is recommended.
- These oils are specifically designed to withstand the high-pressure and water-exposure conditions encountered in pressure washer pumps.
- Detergent-free oils help prevent water contamination and maintain the pump’s performance and longevity.
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Recommended pump oils include Simpson’s Premium Pump Crankcase Oil (part number 80138) and Briggs & Stratton’s SAE30 Pressure Washer Pump Oil.
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Non-Foaming 15W40 Oil:
- Simpson Cleaning recommends their Premium Pump Crankcase Oil, which is a non-foaming 15W40 oil.
- This type of oil is formulated to maximize pump performance and protect critical components, such as bearings and seals, from wear and tear.
- The 15W40 viscosity provides excellent cold-weather starting and high-temperature protection, making it suitable for a wide range of operating conditions.
Oil Change Frequency
- Initial 50 Hours:
- Simpson recommends changing the pump oil after the initial 50 hours of use.
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This initial oil change helps remove any manufacturing residues or contaminants that may have accumulated during the break-in period.
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Every 100 Hours or 3 Months:
- After the initial change, the pump oil should be changed every 100 hours of use or every 3 months, whichever comes first.
- Regular oil changes help maintain the pump’s efficiency and prevent premature wear on critical components.
Additional Tips
- Use the Correct Oil:
- Using the wrong type of oil can cause damage to the pump or engine, leading to costly repairs.
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Always refer to your owner’s manual or the manufacturer’s recommendations for the specific oil requirements of your gas pressure washer.
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Avoid Mixing Oils:
- Do not mix different types of oil, as this can lead to compatibility issues and potential damage to the equipment.
- It is best to use the same oil type and brand throughout the life of your pressure washer.
Technical Specifications
- Viscosity:
- SAE30 and 15W40 oils are commonly used for pressure washers.
- SAE30 oils provide a consistent viscosity across a wide temperature range, making them suitable for year-round use.
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15W40 oils offer better cold-start performance and are often preferred in colder climates, as the “W” (winter) rating indicates improved low-temperature fluidity.
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API Certification:
- Look for oils that have the American Petroleum Institute (API) certification.
- API-certified oils meet industry standards for quality, performance, and compatibility, ensuring they are suitable for use in pressure washer engines and pumps.
References
- Generac. (n.d.). What Type of Oil Should I Use in My Pressure Washer? Retrieved from https://support.generac.com/s/article/What-Type-of-Oil-Should-I-Use-in-My-Pressure-Washer
- Reddit. (2023). What kind of oil should I put in a pressure washer pump? Retrieved from https://www.reddit.com/r/smallengines/comments/12ck701/what_kind_of_oil_should_i_put_in_a_pressure/
- Simpson Cleaning. (n.d.). Premium Pump Crankcase Oil 80138. Retrieved from https://simpsoncleaning.com/products/pump-oil/
- BobIsTheOilGuy. (2010). what oil for pressure washer motor and pump? Retrieved from https://bobistheoilguy.com/forums/threads/what-oil-for-pressure-washer-motor-and-pump.129740/