You’ve got a pressure washer ready to blast away dirt, but the stubborn oil and grease spots just won’t budge. That’s where a dedicated degreaser concentrate makes all the difference. In this guide, we’ve assessed three top-rated formulas from Simple Green, Oil Eater, and Krud Kutter to help you find the best oil and grease remover for pressure washers. Whether you’re cleaning a driveway, a deck, or heavy-duty equipment, these products are designed to dissolve grime without damaging surfaces. For more on pressure washer care, check out our pressure washer category.
Each product we reviewed brings a different strength: one is a versatile concentrate safe on multiple surfaces, another is a heavy-duty formula that tackles the toughest stains, and the third offers a bleach-free option for outdoor cleaning. We’ll walk you through key buying criteria so you can choose the right match for your cleaning tasks.
Pros
- Highly concentrated – one gallon makes up to 64 gallons of cleaner.
- Non-corrosive and safe on metals, plastics, and carpets.
- Biodegradable and unscented, suitable for sensitive environments.
- Versatile – works for automotive, industrial, commercial, and household use.
- Backed by thousands of positive reviews from professionals.
Cons
- Contains Propylene Glycol Butyl Ether and Triethanolamine, which may trigger Prop 65 warnings in California.
- Unscented formula may lack the fresh scent some users prefer.
- Requires dilution for most uses, adding a step for those wanting a ready-to-use product.
Simple Green Pro HD Heavy Duty Cleaner Concentrate is a professional-grade product designed for contractors, industrial facilities, and serious DIYers. It tackles tough grease, grime, and stains on a wide range of surfaces including floors, walls, equipment, appliances, and vehicles. This concentrated formula is a workhorse for pressure washing, parts washing, and ultrasonic cleaning.
What sets this cleaner apart is its non-corrosive nature and safety on metal surfaces, making it ideal for automotive and industrial applications. Users report excellent performance on engine parts, kitchen grease, and even carpets. The biodegradable, unscented formula is a plus for environmentally conscious users and those sensitive to fragrances.
The product comes in a sturdy 1-gallon jug with a handle for easy pouring. As a concentrate, it requires dilution according to the task, which is straightforward. The lack of strong odors makes it comfortable to use in enclosed spaces. The brand Simple Green is trusted by professionals, and this Pro HD version lives up to that reputation.
One drawback is that it contains ingredients that trigger California's Prop 65 warning, which may concern some users. Additionally, it is unscented, so if you prefer a fresh citrus or pine scent, this won't provide that. The need to mix your own solution might be inconvenient for those used to ready-to-use sprays.
Overall, Simple Green Pro HD is a top-tier cleaner and degreaser that delivers on its promises. With thousands of positive reviews and a high rating, it is a reliable choice for heavy-duty cleaning tasks. Its versatility, safety, and eco-friendly profile make it a solid investment for any professional or homeowner looking for serious cleaning power.
Pros
- Cuts through heavy grease and oil stains with little scrubbing.
- Works on a wide variety of surfaces including outdoor pavement, indoor floors, and laundry.
- Biodegradable formula is safer and less likely to damage surfaces compared to solvent cleaners.
- Can be used diluted for light cleaning or full strength for tough stains.
- Highly effective on set-in stains and odors according to user reviews.
Cons
- Thin formula may run off vertical surfaces before penetrating stains, requiring multiple applications.
- Some users note it can damage certain finishes if used undiluted; spot testing is essential.
- A few users experienced discoloration on some materials after use.
Oil Eater Original 1 Gallon Cleaner and Degreaser is a professional strength formula designed to dissolve grease, oil, and heavy-duty stains from a variety of surfaces. Whether you are cleaning a greasy driveway, a dirty grill, or oily laundry, this product promises to make the job easier. It is particularly well-suited for automotive, industrial, and household cleaning tasks where stubborn grime is a challenge.
The standout feature of Oil Eater is its ability to cut through even the toughest greasy residues. User reviews highlight its effectiveness on stains that other cleaners could not remove, such as oil spots on driveways and greasy marks on clothing and bedding. The biodegradable formula offers peace of mind that you are using a cleaner that is less hard on the environment than many solvent-based alternatives.
While the cleaning power is impressive, some users have noted that the formula is quite watery. This can cause it to run off vertical surfaces like grill sides or vertical walls before it has a chance to soak in. As a result, you may need to apply it multiple times when cleaning such surfaces. It is important to follow the directions and test on a small area first to avoid any potential damage, especially on delicate materials.
Despite these minor drawbacks, Oil Eater remains a highly versatile and popular choice for those facing tough grease stains. Its user reviews often praise its ability to literally bring stained items back to life, from laundry to outdoor pavers. The product is easy to use and sets quickly, saving you both time and energy.
Overall, Oil Eater Original is a reliable tool in any clean-up arsenal. It earns a strong recommendation for its powerful cleaning capabilities and versatility, though be prepared for a slightly thin formula that may require extra work on vertical surfaces. For the price and performance, it is a smart buy for heavy-duty degreasing needs.
Pros
- Highly concentrated, excellent value for large projects
- Works on a wide variety of surfaces without damage
- No scrubbing required, saves time and effort
- Bleach-free and biodegradable, environmentally friendlier
- Protects pressure washer from corrosion
Cons
- May require multiple applications for heavily stained surfaces
- Not suitable for use on all delicate materials, test on inconspicuous area first
- Some users may prefer a scented formula
The Krud Kutter Multi-Purpose Pressure Washer Concentrate is a versatile and powerful outdoor cleaner designed for both residential and commercial use. It is ideal for homeowners who want to restore the appearance of their siding, decks, driveways, and patios, as well as for professionals who need a reliable solution for large cleaning jobs.
This concentrate stands out for its ability to penetrate and remove tough stains like oil, grease, bird droppings, and tree sap without the need for scrubbing. Simply apply with a pressure washer, allow it to dwell for 3-5 minutes, and rinse. The formula is bleach-free and biodegradable, making it a safer choice around plants and pets.
In terms of performance, one gallon makes up to 20 gallons of cleaning solution, covering up to 5,800 square feet. This makes it exceptionally cost-effective for big projects. The product also contains anti-corrosive agents that help protect your pressure washer, extending its lifespan.
While the cleaner is highly effective, heavily stained surfaces might require a second application. Also, as with any cleaner, it's wise to test on a small, inconspicuous area first to ensure compatibility with delicate materials. Some users might find the lack of fragrance a minor drawback, but it's a trade-off for the low-chemical formula.
Overall, the Krud Kutter Multi-Purpose Pressure Washer Concentrate delivers excellent value and performance. It simplifies outdoor cleaning tasks, saves time, and produces impressive results. Whether you're washing your home's exterior, a deck, or a vehicle, this product is a dependable choice.
Brand: Krud Kutter
Model Number: 385462
Item Weight: 8.5 pounds
Volume: 1 gallon (128 fluid ounces)
Color: Purple
Coverage: Up to 5,800 square feet per gallon
Dilution: Makes up to 20 gallons of solution
Formula: Bleach-free, biodegradable, water-based with anti-corrosive agents
Manufacturer: Rust-Oleum
Buying Guide
Choosing the best oil and grease remover for your pressure washer depends on a few practical factors. Here are the criteria we used to evaluate these products.
Surface Compatibility
Not all degreasers are safe on every surface. Some formulas are non-corrosive and can be used on metal, concrete, vinyl, wood, and even painted surfaces. Others may require a spot check on delicate materials. Before you commit to a full wash, check the label to ensure the cleaner won’t damage your driveway, siding, or equipment.
For example, Simple Green Pro HD is labeled as non-corrosive and safe on metal, while Krud Kutter is bleach-free and works on a wide range of exterior materials. Oil Eater recommends a spot check on porous surfaces like uncoated concrete. This kind of compatibility matters, just like choosing the right air filter for your furnace ensures clean airflow without damage.
Concentration and Dilution Ratio
A concentrated cleaner gives you more value because you can dilute it according to the job. A higher dilution ratio means you get more gallons of ready-to-use solution from one bottle. Look for products that clearly state their mixing instructions for pressure washer use.
Krud Kutter’s formula makes up to 20 gallons of solution from a single gallon, covering up to 5,800 square feet. Oil Eater and Simple Green also offer concentrated options that stretch your dollar. The right dilution saves you money and reduces chemical waste.
Cleaning Power for Grease and Oil
The core reason you’re buying a degreaser is to remove tough oil and grease. Professional-strength formulas use surfactants to lift and emulsify grime so it rinses away cleanly. Some products work in minutes with no scrubbing, while others may need a longer dwell time.
Oil Eater is specifically designed to dissolve heavy grease and oil stains, making it a favorite for shop floors and equipment. Simple Green Pro HD quickly eliminates grease and grime on both industrial and household surfaces. Krud Kutter requires just 3–5 minutes of dwell time before rinsing, which saves effort. For more on keeping your home clean, explore our laundry and cleaning category.
Eco-Friendliness and Safety
Many users prefer a biodegradable, bleach-free formula that is safe around plants and pets. Check if the product is labeled as biodegradable or low in VOCs. Also consider whether it meets Prop 65 requirements if you’re in California.
Simple Green Pro HD is a Prop 65 compliant product, while Krud Kutter is bleach-free and biodegradable. Oil Eater also emphasizes safety when used according to instructions. Choosing an eco-friendly option helps protect your yard and local waterways.
Final Thoughts
After comparing these three degreasers, we recommend Simple Green Pro HD Heavy Duty Cleaner Concentrate for its versatility and non-corrosive formula that works on a wide range of surfaces, and Oil Eater Original 1 Gallon Cleaner, Degreaser for tackling the toughest oil and grease stains on concrete and equipment. Both offer excellent value and proven performance, so your pressure washer can handle any grime you throw at it.
Frequently Asked Questions
Can I use these degreasers in a pressure washer?
Yes, all three products are designed for pressure washer use. They are concentrates that you dilute with water according to the manufacturer’s instructions. Always use the recommended dilution ratio to avoid damaging surfaces or the pressure washer.
Are these oil and grease removers safe on painted surfaces?
Simple Green Pro HD is non-corrosive and safe on metal and painted surfaces. Krud Kutter is bleach-free and can be used on vinyl, wood, and painted siding. Oil Eater recommends a spot check on any surface before full use, especially on painted or coated areas.
How do I dilute these cleaners for a pressure washer?
Dilution ratios vary by product and job. Simple Green Pro HD suggests a general dilution of 1:10 to 1:30 for pressure washing. Krud Kutter makes up to 20 gallons from one gallon, and Oil Eater can be used full strength or diluted depending on the stain. Always follow the label instructions for best results.
What is the best oil and grease remover for pressure washers in 2026?
For most users, Simple Green Pro HD offers the best balance of safety and cleaning power across many surfaces. If you need to remove heavy grease and oil from concrete or equipment, Oil Eater is the stronger choice. Both are top-rated options for 2026.
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