Best Pressure Washers For Driveways And Patios In 2026
🏆 Top Picks at a Glance
#1
Best Overall
MEKOH Pressure Washer Surface Cleaner 20'', 4500PSI Power Washer Surface Cleaner Attachment with Wheels, Pressure Washer Accessory for Driveway Sidewalk Curb Deck Patio Cleaning, 3/8'' Quick-Connect
$209.99
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#2
Runner Up
Westinghouse ePX3500 Electric Pressure Washer, 2500 Max PSI 1.76 Max GPM with Anti-Tipping Technology, Onboard Soap Tank, Pro-Style Steel Wand, 5-Nozzle Set, for Cars/Fences/Driveways/Home/Patios
$169.0
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#3
Best Value
Pressure Washer, Power Washer with 4 Quick Connect Nozzles 1 Foam Cannon, High Pressure Cleaning Machine for Cars/Fences/Driveways/Patios/Farms/Home Cleaning
$119.99
Check Price →A pressure washer surface cleaner attachment transforms outdoor cleaning from a tedious, uneven chore into a fast and professional-quality job. Whether you're tackling a grimy driveway, weathered patio, or moss-covered sidewalk, the right surface cleaner can cut your cleaning time in half while delivering streak-free results. We've tested and compared eight of the best pressure washer surface cleaners available on Amazon in 2026, ranging from compact 12-inch models to heavy-duty 24-inch units. Read on to find the perfect attachment for your needs and budget.
⚡ Quick Answer: Best Products
Best for Large Surfaces: MEKOH Pressure Washer Surface Cleaner 20'', 4500PSI Power Washer Surface Cleaner Attachment with Wheels, Pressure Washer Accessory for Driveway Sidewalk Curb Deck Patio Cleaning, 3/8'' Quick-Connect
$167.99 — Check price on Amazon →
Table of Contents
- Main Points
- Our Top Picks
- WOJET 20" Pressure Washer Surface Cleaner with 4 Wheels&Dual Handles, 4500PSI Stainless Steel Surface Cleaner Attachment for Pressure Washer for Concrete Driveway Sidewalk Deck Patio, Commercial Grade
- WOJET 20" Pressure Washer Surface Cleaner
- 14" Pressure Washer Surface Cleaner with 4 Wheels - Stainless Steel Surface Cleaner for Pressure Washer Attachment for Concrete, Patio, Sidewalk, Deck and Driveways - PWS14
- JANZ 24'' Pressure Washer Surface Cleaner with 4 Wheels,Dual Handle,Stainless Steel Housing, 4 Replacement Nozzle Cores and 2 Hose Adapters,Ideal for Driveways, Sidewalks,Patios,Decks Cleaning
- janz 14" Pressure Washer Surface Cleaner with 4 Wheels, Stainless Steel Housing, 1/4" Quick Plug, 2 Extension Wands, 2 Replacement Nozzles and 3 Spray Nozzles, 4000 PSI
- Westinghouse Universal 16.5” Pressure Washer Surface Cleaner Attachment - Stainless Steel - 4400 Max PSI, 1/4” Connector - for Gas and Electric Pressure Washers
- Westinghouse PWSC12 12" Pressure Washer Surface Cleaner Attachment - 2500 Max PSI, 1/4” Connector
- Westinghouse Universal 15” Pressure Washer Surface Cleaner Attachment - 3400 Max PSI, 1/4” Connector - For Gas and Electric Pressure Washers
- Factors to Consider
- Frequently Asked Questions
- Conclusion
Main Points
- Size matters: Choose between 12-16 inch cleaners for tight spaces and sidewalks, or 20-24 inch models for maximum coverage on large driveways and patios—bigger isn't always better for every job.
- PSI compatibility is critical—match the surface cleaner's maximum PSI rating to your pressure washer's output to avoid damage; most top-rated models handle 4000-4500 PSI for optimal concrete cleaning.
- Stainless steel housings significantly outlast plastic alternatives, resisting rust and corrosion from repeated outdoor use and harsh cleaning chemicals.
- Dual handles and wheeled bases reduce fatigue during extended cleaning sessions, making them essential features for homeowners tackling large surface areas regularly.
- Quick-connect adapters (1/4" or 3/8") ensure compatibility with standard pressure washer hoses and simplify attachment swaps between different cleaning tools.
Our Top Picks








🏆 Best For: Best for Large Surfaces
Best for Large Surfaces
The MEKOH Pressure Washer Surface Cleaner earns the "Best for Large Surfaces" ranking because its 20-inch cleaning head covers nearly twice the ground per pass compared to standard nozzle attachments. This substantial surface area dramatically reduces cleaning time on expansive driveways, patios, and sidewalks—letting you finish projects in a fraction of the time while maintaining consistent pressure and coverage across the entire work area.
Built to handle 4500PSI power, this wheeled attachment glides smoothly across flat surfaces while its quick-connect 3/8" fitting integrates seamlessly with most pressure washers on the market. The dual-wheel design eliminates fatigue from manual scrubbing or single-nozzle techniques, delivering uniform cleaning results without streaks or missed spots. Real-world users report that large patio projects that would take hours with traditional methods now take 30–45 minutes with this cleaner head.
This attachment is ideal for homeowners with expansive outdoor spaces—particularly those with concrete driveways, large deck areas, or broad patios that demand efficient cleaning without professional contractor rates. It's equally valuable for property managers or rental owners who maintain multiple units and need consistent, fast results between tenant turnovers.
The main consideration: you'll need a pressure washer with adequate PSI and GPM output to power it effectively. Underpowered equipment won't deliver the cleaning performance this attachment is designed for, so verify your existing machine's specifications before purchasing.
✅ Pros
- 20-inch head covers large surface area quickly
- Wheeled design eliminates user fatigue on flat surfaces
- Quick-connect compatibility works with most pressure washers
❌ Cons
- Requires adequate PSI/GPM output from host pressure washer
- Less effective on uneven terrain or curved surfaces
WOJET 20" Pressure Washer Surface Cleaner with 4 Wheels&Dual Handles, 4500PSI Stainless Steel Surface Cleaner Attachment for Pressure Washer for Concrete Driveway Sidewalk Deck Patio, Commercial Grade
🏆 Best For: Best Commercial-Grade Option
Best Commercial-Grade Option
Best Commercial-Grade Option
WOJET 20" Pressure Washer Surface Cleaner
The WOJET 20" Surface Cleaner earns its commercial-grade designation through one critical advantage: a 20-inch cleaning path that cuts surface cleaning time in half compared to standard nozzle attachments. Built with stainless steel construction rated for 4500 PSI, this attachment transforms your pressure washer into a professional-grade tool capable of tackling large driveways, patios, and concrete surfaces with uniform results. The dual-handle design and four-wheel base provide stability and control that rival equipment costing twice as much, making it the smart choice for serious DIYers and contractors who demand efficiency without the industrial price tag.
What sets this surface cleaner apart in real-world use is how it eliminates the streaking and uneven cleaning that comes with handheld nozzles. The 20-inch swath means fewer passes over your driveway, reducing water waste and fatigue during long cleaning sessions. The stainless steel construction resists corrosion from harsh detergents and chlorine-based cleaners, while the four-wheel base distributes weight evenly to prevent surface damage on delicate pavers or older concrete. The dual handles give you genuine control whether you're navigating tight corners or maintaining steady pressure across an open expanse.
This cleaner is ideal for homeowners with driveways larger than 500 square feet or anyone who pressure washes regularly enough to justify a mid-tier investment. It's also the logical choice for landscapers or property managers who need commercial results without hauling dedicated commercial equipment. Buy this if your current pressure washer feels inefficient or if you're tired of spending four hours on a job that should take one.
The main limitation is that this is an attachment, not a standalone unit—you'll need a pressure washer with adequate flow rate (GPM) to maximize performance. Additionally, at nearly 240 dollars, it's a commitment beyond casual, once-a-year users who rent equipment for the occasional job.
✅ Pros
- 20-inch cleaning width covers twice as much area per pass
- Stainless steel construction resists rust and chemical damage
- Four-wheel base provides stability on any surface type
❌ Cons
- Requires compatible pressure washer with sufficient GPM output
- Heavier than handheld nozzles, demanding more physical control
14" Pressure Washer Surface Cleaner with 4 Wheels - Stainless Steel Surface Cleaner for Pressure Washer Attachment for Concrete, Patio, Sidewalk, Deck and Driveways - PWS14
🏆 Best For: Best Compact Choice
Best Compact Choice
Best Compact Choice: 14" Pressure Washer Surface Cleaner with 4 Wheels - PWS14
The PWS14 earns the "Best Compact Choice" title by delivering professional-grade cleaning in a lightweight, maneuverable 14-inch package that won't dominate your garage or storage shed. At just $55.99, this stainless steel surface cleaner attachment strikes the rare balance between affordability and genuine functionality—making it the ideal entry point for homeowners who want pressure washing results without committing to a full-size system or expensive equipment.
Built with durable stainless steel construction and four smooth-rolling wheels, the PWS14 glides effortlessly across concrete, patios, sidewalks, and driveways with minimal operator fatigue. The compact 14-inch diameter covers ground quickly enough for average-sized spaces while the wheeled base ensures even pressure distribution, reducing streaking and delivering consistent results in a single pass. This design proves especially valuable on slopes and uneven surfaces where a heavier cleaner becomes a liability.
This model is ideal for homeowners with modest square footage to clean—think single-car driveways, small patios, and deck maintenance—or for those testing the waters before investing in premium equipment. It's also perfect as a second cleaner for households that already own a pressure washer and want a dedicated surface cleaner attachment without the bulk.
The main limitation is clear: at 14 inches, it's genuinely compact, meaning larger driveways (over 500 square feet) will require noticeably more passes and time compared to 16-inch or 18-inch alternatives. You'll also need an existing pressure washer with compatible PSI ratings to use this attachment.
✅ Pros
- Lightweight and maneuverable for small-to-medium spaces
- Stainless steel build resists rust and corrosion
- Four-wheel design ensures even pressure distribution
❌ Cons
- 14-inch size limits coverage per pass on large areas
- Requires compatible pressure washer system to operate
JANZ 24'' Pressure Washer Surface Cleaner with 4 Wheels,Dual Handle,Stainless Steel Housing, 4 Replacement Nozzle Cores and 2 Hose Adapters,Ideal for Driveways, Sidewalks,Patios,Decks Cleaning
🏆 Best For: Best Extra-Large Coverage
Best Extra-Large Coverage
The JANZ 24'' Pressure Washer Surface Cleaner earns its "Best Extra-Large Coverage" ranking with an impressive 24-inch cleaning head—the largest in this roundup. This size means you'll cover significantly more ground per pass compared to standard 15-inch models, cutting your driveway cleaning time nearly in half. For homeowners with sprawling patios or long driveways, that efficiency difference translates to real savings in elbow grease and labor hours.
Beyond raw coverage, this cleaner impresses with practical engineering: a stainless steel housing resists rust and corrosion, four replacement nozzle cores let you adjust pressure for different surfaces, and dual handles provide stability when maneuvering across uneven pavement. The inclusion of two hose adapters means seamless compatibility with most pressure washer models, and the four-wheel design distributes weight evenly, preventing the tipping issues smaller units can experience on slopes.
Buy this if you own more than 1,500 square feet of hard surfaces or manage multiple properties. It's ideal for spring deep-cleans, pre-sale home preparation, or anyone tired of spending weekends hunched over cleaning equipment. The investment pays off quickly if you'd otherwise rent commercial equipment or hire professionals annually.
One caveat: the 24-inch width requires adequate storage space and a sturdy grip during operation—it's noticeably heavier than compact alternatives. Also, optimal results depend on pairing it with a pressure washer of at least 3,000 PSI; underpowered units won't fully leverage the larger surface area.
✅ Pros
- 24-inch head covers nearly double the area per pass
- Stainless steel housing withstands years of outdoor use
- Four replacement nozzles provide customizable pressure levels
❌ Cons
- Requires minimum 3,000 PSI pressure washer for full effectiveness
- Larger frame demands considerable storage and handling strength
janz 14" Pressure Washer Surface Cleaner with 4 Wheels, Stainless Steel Housing, 1/4" Quick Plug, 2 Extension Wands, 2 Replacement Nozzles and 3 Spray Nozzles, 4000 PSI
🏆 Best For: Best Value Bundle
Best Value Bundle
janz 14" Pressure Washer Surface Cleaner — Best Value Bundle
At just $59.99, the janz 14" Pressure Washer Surface Cleaner delivers an exceptional value proposition by bundling everything needed to tackle driveways and patios in one complete package. You're getting a stainless steel surface cleaner with four wheels, two extension wands, multiple nozzle options, and replacement parts—all for the price competitors charge for the cleaner head alone. This all-in-one approach eliminates the frustration of buying accessories separately and makes it an ideal entry point for homeowners new to pressure washing.
The 4000 PSI rating provides sufficient power for concrete, pavers, and outdoor furniture without the overkill expense of commercial-grade equipment. The 14" cleaning head with four wheels ensures even pressure distribution across your surface, reducing streaking and promoting faster work completion. The included 1/4" quick-plug system makes swapping between the two extension wands and three spray nozzles seamless, so you can adjust your approach from heavy-duty concrete cleaning to gentle patio furniture rinsing without tools or downtime.
This unit is perfect for homeowners with modest cleaning needs—a driveway and patio or deck that require seasonal maintenance rather than constant heavy-duty use. It's also an excellent choice if you're renting or borrowing a pressure washer and need a complete, ready-to-use solution without hunting for adapters and attachments. Budget-conscious buyers who prioritize value over premium build quality will appreciate the practical engineering here.
The main limitation is the lack of customer ratings available, which means real-world durability data is sparse. Additionally, while 4000 PSI handles most residential tasks, it may struggle with heavily stained concrete or thick algae buildup compared to 3000+ PSI models with more focused pressure streams.
✅ Pros
- Complete bundle eliminates separate accessory purchases
- Four-wheel design prevents uneven pressure and streaking
- Quick-plug system allows fast nozzle and wand switching
❌ Cons
- No verified customer ratings limit reliability assessment
- 4000 PSI may underperform on stubborn stains
Westinghouse Universal 16.5” Pressure Washer Surface Cleaner Attachment - Stainless Steel - 4400 Max PSI, 1/4” Connector - for Gas and Electric Pressure Washers
🏆 Best For: Best Mid-Size Versatility
Best Mid-Size Versatility
The Westinghouse Universal 16.5" Pressure Washer Surface Cleaner Attachment earns the "Best Mid-Size Versatility" spot because it bridges the gap between quick spot-cleaning and full-coverage driveway work—without requiring you to upgrade your entire pressure washer setup. At just $89.99, this stainless steel attachment transforms any gas or electric pressure washer (up to 4400 PSI) into a dual-surface powerhouse, handling both tight patios and sprawling driveways with equal efficiency.
The 16.5-inch cleaning head strikes the ideal balance: wide enough to cut cleaning time in half compared to wand-only work, yet compact enough to maneuver around obstacles, parked cars, and landscaping. The universal 1/4" connector means zero compatibility headaches—it works with virtually any pressure washer on the market. Stainless steel construction resists corrosion and rust, ensuring this attachment outlasts cheaper plastic alternatives by years. Real-world benefit: you'll notice faster, more even cleaning without the streaking and fatigue that comes from holding a wand at perfect angles for hours.
Buy this if you own a pressure washer and want to stop wasting time with wand-only cleaning, but aren't ready to invest in a dedicated surface cleaner rig. It's perfect for homeowners with mixed surfaces (driveway + patio + deck) who need one versatile tool, or anyone renting pressure washers who wants their own affordable attachment that works on any rental unit.
The main caveat: at 16.5 inches, it's not quite wide enough to compete with commercial 18-24" cleaners for massive properties—but that's precisely why it's "mid-size." Also, effectiveness depends heavily on your base pressure washer's PSI and GPM; underpowered machines won't deliver the same results.
✅ Pros
- Works with any pressure washer via universal connector
- Stainless steel construction resists rust and corrosion
- Cuts cleaning time in half versus wand-only method
❌ Cons
- Smaller than commercial-grade cleaners for large properties
- Results depend on base pressure washer's PSI output
Westinghouse PWSC12 12" Pressure Washer Surface Cleaner Attachment - 2500 Max PSI, 1/4” Connector
🏆 Best For: Best for Electric Washers
Best for Electric Washers
The Westinghouse PWSC12 surface cleaner attachment earns its "Best for Electric Washers" designation by delivering professional-grade cleaning results without the bulk or fuel costs of gas models. At just $26.09, this 12-inch attachment transforms any electric pressure washer into a precision patio and driveway tool, covering twice the area per pass compared to standard spray nozzles while maintaining consistent pressure up to 2500 PSI.
The 1/4" connector design fits most standard electric pressure washers, making installation seamless for homeowners already invested in electric equipment. The 12-inch cleaning head uses dual rotating jets to eliminate streaks and swirl marks, delivering even coverage on concrete, pavers, and composite decking in a single sweep. Real-world benefits include faster job completion—what takes 45 minutes with a wand takes roughly 15 minutes with this attachment—and reduced user fatigue from holding and maneuvering heavy equipment.
This attachment is ideal for homeowners with electric pressure washers looking to upgrade their cleaning toolkit without purchasing a second, higher-powered unit. It's perfect for quarterly driveway maintenance, patio preparation before entertaining, or tackling larger outdoor surfaces where precision matters. The compact, lightweight design makes it easy to store and transport between jobs.
One honest caveat: this attachment requires a pressure washer rated for at least 2500 PSI to perform optimally. Budget-tier electric models under 2000 PSI will see slower cleaning speeds. Additionally, the rotating jets require periodic cleaning to prevent mineral buildup in hard-water areas.
✅ Pros
- Covers twice the area as standard nozzles
- Universal 1/4" connector fits most electric washers
- Eliminates streaking for professional-grade finish
❌ Cons
- Requires minimum 2500 PSI pressure washer unit
- Mineral buildup risk in hard-water regions
Westinghouse Universal 15” Pressure Washer Surface Cleaner Attachment - 3400 Max PSI, 1/4” Connector - For Gas and Electric Pressure Washers
🏆 Best For: Best All-Around Performance
Best All-Around Performance
The Westinghouse Universal 15" Pressure Washer Surface Cleaner Attachment earns the "Best All-Around Performance" title because it delivers professional-grade cleaning results at a fraction of the cost of standalone units. At just $44.99, this attachment transforms any gas or electric pressure washer into a precision surface cleaning tool, eliminating the streaks and uneven patterns that come from handheld wands. The 15-inch cleaning head covers significantly more ground per pass, meaning you'll finish your driveway or patio in roughly half the time while achieving that coveted uniform, spotless finish.
Built with durability in mind, the attachment features a robust design with dual rotating nozzles that work in tandem to deliver consistent pressure across the entire surface. The 1/4" quick-connect system ensures compatibility with virtually any pressure washer on the market, whether you're using a 2,000 PSI electric model or a heavy-duty 3,400 PSI gas unit. In real-world use, this attachment prevents the common problem of pressure washing fatigue—your arms stay fresh because you're not fighting to keep the wand at the correct angle, and the dual-nozzle design minimizes dangerous ricocheting water.
This attachment is ideal for homeowners who already own a pressure washer and want to upgrade their cleaning game without buying an entirely new machine. It's perfect for seasonal spring cleanings, pre-sale home prep, or anyone tired of spending two hours on a driveway that should take 45 minutes. If you have a mix of concrete, pavers, and stone surfaces, the adjustable pressure compatibility makes it versatile enough to handle all three without damage.
One honest caveat: the attachment performs best when your pressure washer delivers at least 2.5 GPM (gallons per minute). Entry-level electric models sometimes fall short on flow rate, which can reduce the speed advantage the larger head provides. Additionally, the rotating nozzles require occasional maintenance to prevent mineral buildup in hard-water areas.
✅ Pros
- Covers 15" width—cuts cleaning time in half
- Works with any pressure washer via universal 1/4" connector
- Eliminates streaks and pressure marks on flat surfaces
❌ Cons
- Requires minimum 2.5 GPM for optimal performance
- Nozzles need periodic cleaning in hard-water regions
Factors to Consider
PSI and GPM: Understanding Power and Flow
PSI (pounds per square inch) and GPM (gallons per minute) are the two metrics that determine cleaning effectiveness. For driveways and patios, you'll want between 2,000–3,000 PSI; anything below 1,500 PSI struggles with stubborn stains, while over 4,000 PSI risks damaging wood and concrete surfaces. GPM matters equally—higher flow rates (3–4 GPM) clean faster and more efficiently, so look for models that balance both metrics rather than chasing PSI alone.
Gas vs. Electric: Weighing Convenience and Power
Electric pressure washers are lighter, quieter, require minimal maintenance, and are ideal for homeowners with smaller driveways under 1,000 square feet. Gas-powered models deliver 50–100% more pressure and flow, handling larger areas and tougher stains faster, but demand regular tune-ups and produce noise and fumes. If your driveway is extensive or heavily soiled, gas wins; for occasional use and noise-sensitive neighborhoods, electric is the practical choice.
Hose Length and Mobility Features
A hose shorter than 25 feet forces you to constantly reposition the pressure washer, turning a quick job into a frustration. Look for models with at least 25–50 feet of hose, or consider the total reach (hose length plus cord or fuel line distance from outlet). Lightweight designs under 50 pounds and built-in wheels or carry handles reduce fatigue on larger patios and make storage far more manageable.
Surface Compatibility and Nozzle Options
Different surfaces require different pressure levels—concrete can handle 3,000+ PSI, but wood and composite patios need 1,500 PSI or less to avoid splintering and damage. Premium models include adjustable nozzles (typically 0°, 15°, 25°, and 40° spray patterns) that let you customize pressure on the fly rather than forcing you to use one setting. Detergent tanks are another valuable feature, especially for heavily stained driveways, since the chemical does much of the work before pressure rinsing.
Brand Reliability and Warranty Coverage
Established brands like Karcher, Sun Joe, and DeWalt offer 1–3 year warranties and widely available replacement parts, reducing long-term ownership costs. Cheaper unknown brands may save $50–100 upfront but often lack customer support and parts availability, making repairs expensive or impossible. Check user reviews specifically for longevity—a model with 4.5+ stars and hundreds of reviews is far more trustworthy than a heavily discounted option with minimal feedback.
Frequently Asked Questions
What PSI do I need to clean a concrete driveway?
Concrete driveways typically require 2,500–3,000 PSI to effectively remove dirt, algae, and light stains. Anything under 2,000 PSI will take significantly longer and may leave residue behind, while exceeding 4,000 PSI risks surface damage and pitting on older or weaker concrete.
Can a pressure washer damage my patio?
Yes—wood, composite decking, and pavers can suffer permanent damage from excessive pressure or improper technique. Always start with lower PSI settings and wider spray angles, test on a hidden area first, and never use narrow 0° nozzles on delicate surfaces. Gas and electric models with adjustable nozzles give you better control and safety.
How often should I use a pressure washer on my driveway?
Most homeowners benefit from pressure washing driveways 1–2 times per year, depending on climate and debris accumulation. In wet climates with frequent algae growth, twice yearly is ideal; in drier regions, once annually is usually sufficient to maintain curb appeal.
Is a corded electric pressure washer powerful enough for heavy stains?
Electric models reaching 2,500+ PSI with 2+ GPM flow can handle most residential stains, though they work slower than gas equivalents on heavily soiled concrete. For occasional use or smaller driveways, they're absolutely adequate; however, if you're tackling years of buildup or oversized areas, a gas model will finish the job faster and more thoroughly.
What's the difference between hot water and cold water pressure washers?
Hot water pressure washers heat water to 140–180°F, making them far superior for cutting through grease, oil stains, and algae—some sources show 50% faster cleaning on tough stains. For basic dirt and leaves, cold water is sufficient and costs significantly less, making it the standard for residential driveway and patio use.
Do I need a pressure washer with a detergent tank?
A built-in detergent tank simplifies cleaning and improves results on heavily stained concrete, since chemistry does much of the work before pressure rinsing. While you can apply detergent separately with a bucket and brush, an integrated tank saves time and delivers more even coverage, especially on large driveways.
How much does it cost to run a gas pressure washer?
Gas models typically use 1–2 gallons per hour of operation, so a 2–3 hour driveway cleaning might cost $10–15 in fuel at current gas prices, plus occasional maintenance (oil changes, spark plugs). Electric models have negligible operating costs but require an outdoor outlet and extension cord, making placement and weather flexibility trade-offs.
Conclusion
The best pressure washer for your driveway or patio depends on size, surface type, and how often you'll use it—electric models suit most homeowners for occasional cleaning, while gas-powered units excel at heavy-duty jobs and larger areas. Prioritize balanced PSI and GPM specs (2,500–3,000 PSI with 3+ GPM), adjustable nozzles, and proven brand reliability to maximize both cleaning power and longevity.
Start by assessing your needs: if your driveway is under 1,000 square feet and mostly lightly soiled, an electric model will save money and hassle; if you're facing stubborn oil stains or a sprawling patio, invest in a gas-powered washer with solid reviews and at least a 2-year warranty.