When it comes to cleaning tough grime, mold, or mud from your driveway, patio, or vehicle, a gas pressure washer is your ultimate companion. Unlike electric washers, gas models offer higher PSI and GPM ratings, making them ideal for heavy-duty cleaning tasks. In this post, we’ve compiled a list of the top 5 gas pressure washers for 2025—based on performance, engine quality, user satisfaction, and real-world value.
Quick List:
- SIMPSON PS3228 PowerShot
- Westinghouse WPX4400
- DEWALT 61147S
- Simpson CM61083 Clean Machine
- Westinghouse WPX3400
SIMPSON PS3228 PowerShot
Power Source: Gas | PSI: 3300 | GPM: 2.5 | Cleaning Units: 8250 | Power-to-Weight: ~106 CU/lb (Weighs ~78 lbs)
A premium-grade pressure washer designed for serious users, the SIMPSON PS3228 PowerShot is one of the most trusted models on the market. Powered by a Honda GX200 commercial engine, it’s built for performance and longevity. It easily tackles everything from commercial cleaning jobs to large-scale residential tasks.
Review
The Honda GX200 engine is the star of the show, delivering steady, reliable power and long-term durability. With 3300 PSI and 2.5 GPM, it generates 8,250 cleaning units—making it capable of handling driveways, roofs, siding, decks, and even paint stripping. The frame is made from welded steel, and the premium MorFlex hose resists kinking while offering plenty of reach. Five quick-connect nozzles allow for precision in cleaning, and the included ergonomic spray gun makes extended use more comfortable. Though it’s heavier than residential models, its pneumatic tires make it manageable. If you’re looking for a semi-pro machine that can handle regular heavy-duty use, the PS3228 is hard to beat.
Westinghouse WPX4400
Power Source: Gas | PSI: 4400 | GPM: 4.2 | Cleaning Units: 18,480 | Power-to-Weight: ~175 CU/lb (Weighs ~105 lbs)
With incredible raw power, the Westinghouse WPX4400 is ideal for heavy-duty outdoor cleaning. It outpaces most models in its class, making it perfect for contractors, commercial users, or large property owners. It’s one of the most powerful consumer-grade gas washers available in 2025.
Review
The 4400 PSI and 4.2 GPM flow rate combine to deliver a massive 18,480 cleaning units. That’s nearly double the output of standard gas washers. Users love its ability to clean concrete, strip paint, and blast through years of grime with ease. It comes with five quick-connect nozzles and a rugged steel frame designed for frequent transport and outdoor use. While the power is impressive, it’s not recommended for delicate surfaces due to the high pressure. Its larger engine means more weight and fuel usage, but for jobs where performance matters, it’s worth every pound.
DEWALT 61147S
Power Source: Gas | PSI: 3300 | GPM: 2.4 | Cleaning Units: 7920 | Power-to-Weight: ~106 CU/lb (Weighs ~75 lbs)
The DEWALT 61147S is a solid all-around performer that’s perfect for homeowners who need more than an electric unit but don’t want the size or fuel demands of a commercial machine. It combines professional-grade construction with user-friendly design.
Review
This washer features a durable 208cc engine and puts out 3300 PSI at 2.4 GPM—plenty of pressure for deep cleaning decks, siding, sidewalks, and even prepping surfaces for painting. The steel frame and DEWALT’s attention to detail make it a long-lasting investment. It comes with a standard set of five nozzles and a reliable spray wand. While it doesn’t have the brute force of the WPX4400, it’s far more manageable and quieter. For most users, this model hits the sweet spot between power, usability, and long-term reliability.
Westinghouse WPX3400
Power Source: Gasoline | PSI: 3400 | GPM: 2.6 | Tank Volume: 0.5 Gallons | Power-to-Weight: Approximately 42 cleaning units/pound (WPX3400 weighs around 200 pounds)
The Westinghouse WPX3400 is a powerful gas pressure washer that is favored for heavy-duty cleaning and commercial use. Its robust engine and strong water pressure make it ideal for tackling tough dirt and grime on driveways, decks, and construction equipment.
Review
Powered by a 212cc 4-stroke OHV engine, the WPX3400 delivers a strong 3400 PSI and 2.6 GPM flow rate, ensuring deep cleaning power for large areas. The machine includes durable steel frame construction, 12-inch never-flat wheels for easy transport, and five quick-connect nozzles for versatility. While the gas engine means more noise and regular maintenance, the power and mobility it offers are worth it for users with heavy cleaning needs. Some users note the starting process can require a few pulls, but the overall reliability and cleaning performance receive high praise.
SIMPSON Cleaning CM61083 Clean Machine
Power Source: Gasoline | PSI: 3400 | GPM: 2.5 | Tank Volume: 2.5 Gallons | Power-to-Weight: Approximately 35 cleaning units/pound (Clean Machine weighs about 243 pounds)
Known for its durable build and reliable performance, the SIMPSON Cleaning CM61083 Clean Machine is a favorite among professionals and homeowners alike who need a robust gas pressure washer. It balances power, portability, and ease of use in a compact frame.
Review
With a 208cc CRX engine delivering 3400 PSI and 2.5 GPM, the Clean Machine handles heavy-duty cleaning with ease. Its steel frame and 10-inch pneumatic wheels make transport over rough terrain easier, and the 30-foot hose extends reach for larger jobs. The ergonomic spray gun adds comfort during prolonged use, although some users find the plastic trigger less durable. Overall, it offers dependable power and maneuverability, making it a solid choice for both residential and light commercial applications.