Which car engine cleaner is most effective for removing stubborn grime and oil buildup?
This page compares 5 car engine cleaners with verified specifications and prices. Top options include Bilt Hamber Surfex HD Cleaner, Autoglym Engine & Machine Cleaner, Chemical Guys Signature Series Orange Degreaser 16 fl oz. Prices range from £2 to £12. All data is sourced from manufacturer documentation and specialist retailers.
| Product ⇅ | Price ⇅ | Active Ingredient ⇅ | Solution Strength (percentage) ⇅ | pH Level (none) ⇅ | Temperature Resistance (degrees Celsius) ⇅ | Safe for Parts ⇅ | Application Method ⇅ |
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Bilt Hamber Surfex HD Cleaner
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£11.03 ≈ | — | 0.5% to 100% | — | — | ✓ | Spray, brush or pressure washer |
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Bilt Hamber Surfex HD is a water-based, solvent-free cleaner and degreaser that removes oil, grease, organic grime and water-deposited dirt. Its concentration can be adjusted from 0.5% for light cleaning to full strength for heavy-duty work, making it suitable for car owners, detailers and professional workshops. ★ Ideal forIt suits stubborn engine grime and oil buildup because it is a strong water-based degreaser that can be used neat, left to dwell for one to five minutes, agitated with a stiff-bristled brush and rinsed clean.
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Autoglym Engine & Machine Cleaner
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£12.18 ≈ | — | — | — | — | ✓ | Apply generously, agitate with a brush and hose off with cold water |
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A water-based engine and machinery cleaner that rapidly dissolves oil, grease and grime. It suits vehicle owners, mechanics and detailing enthusiasts cleaning engine bays and mechanical components. ★ Ideal forIt is well suited to removing stubborn grime and oil buildup because its water-based formula rapidly dissolves oil, grease and grime and is designed for engine components, tools and machinery.
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Chemical Guys Signature Series Orange Degreaser 16 fl oz
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£8.85 ≈ | citrus extracts and hyper surfactants | 6 parts water to 1 part degreaser for extreme cleaning; 10-15 parts water to 1 part degreaser for medium cleaning; 25-40 parts water to 1 part degreaser for light cleaning | — | — | ✓ | Spray diluted product on a cold surface, soak for 40-60 seconds, scrub if needed, and rinse with water |
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This concentrated, professional-strength citrus degreaser is designed to remove motor oil, coolant, hydraulic fluid, diesel fuel, grease, grime, and caked-on dirt. It suits car owners, detailers, and off-road enthusiasts who need adjustable cleaning strength for engines, tires, wheels, suspension, and undercarriages. ★ Ideal forIt suits removing stubborn engine grime and oil buildup because its professional-strength citrus formula targets motor oil and other heavy contaminants, while dilution ratios as strong as 6 parts water to 1 part degreaser provide flexible heavy-duty cleaning.
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STP GST73500ENP Engine Degreaser Professional Series 500 ml
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£1.79 ≈ | — | — | — | — | ✓ | Spray on a warm engine, leave for 10-15 minutes, then hose off |
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A professional-strength spray degreaser designed to penetrate and dissolve heavy grease, grime, dirt, and deposits. It is suitable for petrol and diesel car, lorry, van, and tractor engines, making it useful for vehicle owners and trade users. ★ Ideal forThis product suits stubborn grime and oil buildup because its professional heavy-duty formula penetrates and dissolves heavy grease and deposits, with a 10-15 minute dwell time to loosen contamination before rinsing.
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Aero Cosmetics Wash ALL Multi-Purpose Cleaner and Degreaser, 16 oz (787P)
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£8.82 ≈ | — | — | — | — | — | Spray on and wipe dry |
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Wash ALL is a biodegradable cleaner and degreaser designed for tough, greasy, and oily cleaning jobs. It removes grease, oil, dirt, diesel exhaust, and aircraft turbine soot and is described as safe on a wide range of surfaces. It's meant for use by spraying on and wiping dry for fast cleaning. ★ Ideal forIt's engineered for tough, greasy, and oily jobs and removes grease and oil, and the product is used by spray on and wipe dry for fast degreasing of stubborn engine grime.
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