Best Degreaser for Pressure Washer: Top Choices for Heavy-Duty Cleaning
When choosing a degreaser for a pressure washer, rely on industrial-strength formulas that cut through heavy grease, oil, and grime without damaging surfaces. This guide highlights five proven options and explains who each product is best for, plus practical tips to optimize cleaning without harming your equipment. The top picks cover automotive, workshop, and facility needs, from engines to concrete and equipment surfaces. Use the buyer table below to compare essentials at a glance.
| Product | Best For | Key Benefit |
|---|---|---|
| Simple Green Industrial Cleaner and Degreaser (128 Oz) | Heavy-duty shops, manufacturing, and automotive facilities | EPA Safer Choice, versatile surface compatibility |
| 3D Grand Blast Engine Degreaser – 1 Gallon | Engines, wheels, undercarriages | Fast-acting, low-odor, non-staining |
| Simple Green Pro HD Heavy Duty Cleaner Concentrate (1 Gallon) | Contractors and multi-purpose jobs | Professional-grade, wide application including pressure washing |
| Zep Industrial Purple Cleaner and Degreaser Concentrate (5 Gallon) | Large facilities, shops | High-volume concentrate for extensive cleaning |
| Oil Eater Original 1 Gallon | Food service facilities and washable surfaces | Biodegradable, noncorrosive degreasing |
Simple Green Industrial Cleaner and Degreaser

Best for facilities that demand a versatile cleaner, degreaser, and deodorizer in one. This industrial-strength formula removes heavy dirt, grease, food residue, and stains from washable surfaces, including counters, carpet, floors, machines, and vehicles. It is recognized by the U.S. EPA Safer Choice Program, signaling emphasis on safer formulations. Use when you need broad cleaning power without multiple products.
Who it’s best for: large shops, manufacturing plants, and fleets needing a single, compliant cleaner for various surfaces. Why selected: strong degreasing action with safety credentials. Caution: test on delicate surfaces to verify colorfastness or finish integrity before broad application.
3D Grand Blast Engine Degreaser

Best for engine bays, wheel wells, and undercarriages where heavy oil and grime accumulate. Grand Blast offers heavy-duty degreasing power that works quickly without excessive scrubbing. It is designed to be safe on metal, plastic, paint, and rubber, reducing the risk of surface damage while delivering fast results. Its fast-acting formula rinses clean with minimal residue.
Who it’s best for: mechanics, auto enthusiasts, and shop crews needing rapid cleaning of engines and components. Why selected: strong grease-cutting action with surface safety. Caution: avoid prolonged soaking on sensitive painted finishes if not diluted as directed.
Simple Green Pro HD Heavy Duty Cleaner Concentrate

Best for contractors and multi-use jobs, especially where pressure washing is part of a broader cleaning schedule. Pro HD is PROP 65 compliant, non-corrosive, and designed for multi-purpose contractor applications, including floors, walls, industrial equipment, appliances, and vehicles. Its versatility makes it a practical choice when you handle varied cleaning tasks in one project.
Who it’s best for: professional cleaners, facility maintenance teams, and rental fleets. Why selected: professional-grade formula with broad compatibility. Caution: follow dilution instructions to maximize safety and effectiveness, particularly on sensitive surfaces.
Zep Industrial Purple Cleaner and Degreaser Concentrate

This high-volume concentrate is designed for large cleaning tasks. Comes in a 5-gallon container that makes up to 128 gallons of cleaner, offering a cost-effective solution for facilities with frequent cleaning needs. It is ideal for industrial settings and shops requiring durable degreasing in bulk.
Who it’s best for: big facilities, maintenance departments, and cleaning contractors handling extensive workloads. Why selected: economical bulk concentrate. Caution: ensure thorough rinsing to prevent residue on sensitive surfaces or equipment.
Oil Eater Original 1 Gallon Cleaner

Best for washable surfaces found in food-service facilities and similar settings. Oil Eater dissolves grease, oil, and heavy stains and is USDA-approved for use in facilities with food safety considerations. Its biodegradable, noncorrosive formula supports safer degreasing in environments requiring stricter cleanliness standards.
Who it’s best for: commercial kitchens, cafeterias, and maintenance teams needing a safer, biodegradable option. Why selected: food-service safety credentials and noncorrosive formula. Caution: verify compatibility with very delicate finishes before wide application.
Buying Guide: Key Purchase Considerations
- Surface compatibility: choose a degreaser that lists compatibility with the surfaces you clean regularly (metal, plastic, painted surfaces, concrete).
- Concentrate vs. ready-to-use: concentrates save money for large volumes; ready-to-use formulas offer convenience for small-scale tasks.
- Environmental and safety considerations: look for noncorrosive formulas, biodegradable options, and EPA Safer Choice or USDA approvals where relevant.
- Application environment: for engines and heavy equipment, select fast-acting, low-odor formulas to minimize downtime and improve safety in enclosed spaces.
- Rinse and residue: consider products that rinse clean with minimal residue to prevent streaks or dulling on surfaces.
- Volume needs: bulk containers are cost-effective for large facilities; match the container size to your typical cleaning workload.
FAQ
- Q: Can these degreasers be used with a pressure washer for auto detailing? A: Yes, many are designed for pressure washing, but always follow the manufacturer’s dilution and usage instructions.
- Q: Are these products safe for aluminum engines? A: Most heavy-duty degreasers are formulated to be safe on metal and painted surfaces; test on a small area first if you’re unsure.
- Q: Do these products require rinsing with water after application? A: Most require thorough rinsing to remove residue; check each product’s guidelines.
- Q: Which degreaser is best for food-service environments? A: Oil Eater Original is USDA-approved for use in food-service facilities and is biodegradable and noncorrosive.
- Q: Do concentrates need special handling? A: Yes, follow dilution ratios and safety data sheets to ensure effective cleaning and safe use.
- Q: Are there eco-friendly options among these degreasers? A: Simple Green products and Oil Eater offer biodegradable formulations, with varying certifications for safety.