# Best Engine Bay Cleaners for a Clean, Dressed Engine Source: https://cardetailpicks.com/best/best-engine-bay-cleaners Updated: 2026-09-14 Publisher: Car Detail Picks. Our score is an editorial rating out of 10 (fit 35%, features 25%, build 20%, value 20%), not a customer rating. Method: https://cardetailpicks.com/how-we-research#our-score An engine bay cleaner is a degreaser that cuts through the oily film, dust, and grime that collect on and around your engine. You dilute it, spray it on a cool engine, agitate, and rinse for a fresh, uniform look under the hood. A clean bay makes leaks easier to spot and adds appeal at resale, so it matters to detailers and enthusiasts alike. When choosing one, look for a formula safe on plastics, rubber, and painted surfaces, favor concentrates you can dilute to match how dirty things are, and consider pairing with a dedicated dressing. Always cover sensitive electronics and keep the engine cool before you spray. ## Picks ### 1. Meguiar's D10801 Super Degreaser, 1 Gallon Our score: 8.6/10 (Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 9/10) Meguiar's D10801 Super Degreaser in a 1 Gallon jug, a concentrated degreaser for engines and wheel wells. Pros: - 1 Gallon concentrate provides many engine cleanings - Dilutable strength adapts to light or heavy grime - Meguiar's professional product quality Cons: - Needs separate spray bottles for application - Too strong for delicate plastics if used undiluted Details: https://cardetailpicks.com/product/B0006SH4HS ### 2. SONAX Engine Cleaner - Powerful Degreaser, Phosphate & Solvent-Free, 500 ml Our score: 8.1/10 (Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10) SONAX Engine Cleaner, a powerful degreaser in 500 ml that is phosphate and solvent-free for gentler engine bay cleaning. Pros: - Phosphate and solvent-free formula is gentler on rubber - Powerful degreasing for oily engine surfaces - 500 ml bottle is a good size for home detailers Cons: - Higher price than bulk degreasers - Heavy caked-on grime may need multiple applications Details: https://cardetailpicks.com/product/B00OA1QJZU ### 3. Simple Green Pro HD Heavy Duty Cleaner & Degreaser Concentrate, 1 Gallon Our score: 8.0/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 7/10 · Value 9/10) Simple Green Pro HD heavy duty cleaner and degreaser concentrate in 1 Gallon for engines and shop use. Pros: - Concentrate can be diluted for engine bays and wheel wells - 1 Gallon jug is great value for regular detailing - Versatile cleaner for shop floors and tools Cons: - Requires dilution and a spray bottle - Can be too aggressive for some coatings if not diluted Details: https://cardetailpicks.com/product/B01M5D77SS ### 4. WD-40 Specialist Foaming Machine and Engine Degreaser, 18 oz Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 7/10 · Value 9/10) WD-40 Specialist Foaming Machine and Engine Degreaser in 18 oz, a clinging foam for greasy engine bays. Pros: - Foaming formula clings to vertical engine surfaces - WD-40 brand availability makes it easy to buy - 18 oz can handles a full engine bay clean Cons: - Must avoid spraying on sensitive electronics - Strong degreaser can dull some plastics if left too long Details: https://cardetailpicks.com/product/B00CMT9MYC ### 5. Griot's Garage 10959 Engine Cleaner, 22 oz Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10) Griot's Garage 10959 Engine Cleaner in 22 oz, a ready-to-use engine bay cleaner for enthusiasts. Pros: - Ready to use formula saves dilution steps - 22 oz bottle offers a generous amount for engines - Griot's quality works well on plastics and metal Cons: - Less aggressive than industrial degreasers - Pricier than generic engine degreasers Details: https://cardetailpicks.com/product/B00IUE5OCC ### 6. GUNK EBT32 Engine Cleaner and Degreaser, 32 oz Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 7/10 · Value 9/10) GUNK EBT32 Engine Cleaner and Degreaser in 32 oz, a trigger bottle for controlled engine cleaning. Pros: - Trigger bottle gives more control than aerosols - 32 oz size handles multiple engine cleanings - Low price for a heavy duty degreaser Cons: - Harsh on rubber and plastics if left too long - Requires thorough rinsing to prevent residue Details: https://cardetailpicks.com/product/B00EDDX7L4 ### 7. Gunk EB1 Engine Brite Original Heavy Duty Engine Degreaser, 15 oz Our score: 7.5/10 (Fit for the job 8/10 · Features and specs 6/10 · Build and materials 7/10 · Value 9/10) Gunk EB1 Engine Brite Original Heavy Duty Engine Degreaser in 15 oz, a classic aerosol for oily engines. Pros: - Heavy duty formula cuts through thick oil and grease - Classic Gunk product used by mechanics for decades - Very affordable price per can for occasional engine cleaning Cons: - Strong solvent smell requires good ventilation - Aggressive cleaner can harm painted or delicate surfaces Details: https://cardetailpicks.com/product/B00FGW14ES ### 8. Purple Power 4319PS Industrial Strength Cleaner and Degreaser, 40 oz (2 Pack) Our score: 7.2/10 (Fit for the job 7/10 · Features and specs 7/10 · Build and materials 6/10 · Value 9/10) Purple Power 4319PS industrial strength cleaner and degreaser, 40 oz in a 2 Pack for tough engine grime. Pros: - Industrial strength formula tackles heavy grease - 2 Pack gives plenty of product for several cleanings - Budget-friendly option for DIY mechanics Cons: - Can stain aluminum or painted surfaces if left to dry - Strong chemical smell and skin irritation risk Details: https://cardetailpicks.com/product/B07FQZFC8K As an Amazon Associate I earn from qualifying purchases.