What Is The Best Oil To Use With A DeWalt Pressure Washer?

DeWalt Pressure Washers are among the top choices for both professional and domestic users due to their reliability and performance. To ensure the optimal functioning and longevity of your machine, it’s paramount to use the right oil.

Proper maintenance is the key to extending the lifespan of any machinery, and your DeWalt Pressure Washer is no exception.

The oil you choose plays a significant role in its performance and durability. So, what’s the best oil for your DeWalt Pressure Washer?

Let’s dive in.

Quick Answer

The best type of oil to use in a DeWalt pressure washer is either a SAE 10W30 or SAE 10W40 engine oil.

This specific oil type offers versatility, catering to a broad range of operating temperatures.

I’d recommend something like Pennzoil Conventional 10W-30 Motor Oil.

Engine Oil: The Heartbeat of Your Machine

1. SAE 10W30 or SAE 10W40: These are the most commonly recommended oils for a broad range of operating temperatures. They provide the right viscosity to ensure smooth engine operations during both warm and cold conditions.

2. Synthetic Oils: High-quality synthetic oils can offer superior protection against wear, especially under high-temperature conditions. They resist breaking down and can protect the engine even during extended usage periods. However, always ensure that the synthetic oil chosen is suitable for pressure washers.

Pump Oil: Ensuring Smooth Operations

1. DP70 Pump Oil: DP70 is a popular choice for DeWalt Pressure Washer pumps. It’s specifically designed to protect the pump components and ensure they function seamlessly. The oil’s unique blend ensures it remains stable under varying operating conditions.

2. SAE 30W Nondetergent Oil: Another viable option for the pump is the SAE 30W nondetergent oil. It provides the right consistency and lubrication to keep the pump’s moving parts in optimal condition. Ensure that the oil you pick is labeled ‘nondetergent’ to avoid any internal build-up.

Checking the Manual: Your First Stop

Before making a choice, always refer to the user manual that came with your DeWalt Pressure Washer. The manufacturer might have specific oil recommendations based on the model and its requirements. Adhering to these guidelines ensures that you maintain the machine’s warranty and get the best performance.

Factors to Consider When Choosing Oil

1. Operating Conditions: Consider the climate and temperature range of your region. Some oils work better in cold climates, while others are more suited for warmer conditions.

2. Frequency of Use: If you use your pressure washer extensively, consider oils that offer longer protection and resist breakdown under prolonged use.

3. Budget: While it’s essential to not skimp on quality, there are oils available at various price points. Decide on a budget but ensure you’re still opting for a reputable brand.


Choosing the right oil for your DeWalt Pressure Washer is paramount to ensure its efficient performance and longevity. By considering the factors mentioned above and sticking to recommended guidelines, you can ensure your machine remains a reliable cleaning companion for years to come.

Remember, the small investment in the right oil now can save significant costs in repairs and replacements in the future.

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