Product Price Active Ingredient Solution Strength (percentage) pH Level (none) Temperature Resistance (degrees Celsius) Safe for Parts Application Method
SONAX SONAX Engine Cleaner (SKU SON-543-MAIN; 500 mL)
US
£9.81 Spray on engine compartment, leave to work for 3 to 5 minutes, rub in with a brush if necessary, rinse with a strong water jet

SONAX Engine Cleaner dissolves and removes oil and grease from engines, machine parts, and tools. It is phosphate- and solvent-free, and is described as safe on metal, plastic, and rubber surfaces. It's designed to reach hard-to-access areas thanks to strong infiltration ability.

★ Ideal for

It's phosphate- and solvent-free and safe on metal, plastic, and rubber, with a simple spray-on, soak 3 to 5 minutes, then rinse application method that works well for beginners.

Gunk GUNK Original Engine Degreaser 15 oz (Model # EB1CA/6, pack of 2)
US
£7.97 Spray engine bay and parts, wait 10 minutes and rinse with water

GUNK Original Engine Degreaser is a heavy-duty engine cleaner/degreaser designed to dissolve tough oil and grease buildup. It's applied by spraying the engine bay, letting it soak, then rinsing off with water. It's aimed at cleaning greasy, hard-working engines and engine bays.

★ Ideal for

It's an easy spray-on, soak, and rinse product, with directions specifically stating spray on, wait 10 minutes, then rinse-making it beginner-friendly for routine engine cleaning.

Griot's Garage Griot's Garage Engine Cleaner (Item # 10959)
US
£9.05 Spray on and agitate the area with a detail brush to remove grease, oil, dirt, and grime; wipe clean

Griot's Garage Engine Cleaner (Item # 10959) is a ready-to-use engine cleaner/degreaser designed to loosen and break up grease, grime, and engine gunk. It's applied by spraying onto the engine bay, agitating with a detail brush, and wiping clean. It's intended to prep engine parts before applying dressing.

★ Ideal for

It's easy for beginners because it's ready to use and uses a simple spray-on, agitate-with-a-brush, wipe-clean routine to remove grease, oil, dirt, and grime.