Best Engine Cleaners of 2025

"Overall, I find this product to be very effective and non-abrasive, leaving a nice deep finish after rinsing."

"I really appreciate the built-in straw nozzle; it keeps things tidy and directs the spray exactly where I need it."

"After using it on my motorcycle, I noticed it did a great job of removing years of oil and grime from the engine."

“I use this all the time to keep my engine compartment clean.”

“This product worked wonders on my 18-year-old vehicle that needed a deep cleaning.”

“After using Griot's engine cleaner, my engine looks brand new!”

"I didn't bother with before pictures, but wow, this product is amazing! After just a minute of letting it sit and a gentle scrub, my stove is now incredibly shiny. It even brought my sink back to a sparkling shine I thought was impossible!"

"As a mechanic, I've used many degreasers, but this one is top-notch. I appreciate that it can degrease without needing to dilute it too much. Just be cautious, as it's strong and can even strip oils from your skin!"

"I initially thought this product might not work, but it has exceeded my expectations. It made cleaning the engine bay super simple, and I’m now using Chemical Guys for my whole car cleaning routine!"

"This product works very well; it cleans off grease and oil effectively. I'm satisfied and will be purchasing more."

"I understood this wasn't exactly like brake cleaner, but I was hoping it would be a spray-on, no wipe solution. I was mistaken. It does a great job at removing grease, but it does need to be scrubbed or wiped off afterward. I appreciate that it's safe for electronics, making it easier to use. It's a good product overall; I just needed to adjust my expectations a bit."

"I noticed this product was made in Romania. However, the instruction lettering was so small that I needed a magnifying glass to read it. I’m used to a product called Gunk, which you could spray on and wash off easily. This one requires a cloth for removal, which makes cleaning an auto engine quite challenging. I ended up buying the old Gunk to spray over it and wash down with a hose."

“I needed to clean my 2007 Ford Focus engine, which was quite dirty. I chose the Foamy version for its gentler action. The foam came out like shaving cream, allowing me to see what areas I missed. After letting it sit, rinsing was a breeze, and I was extremely happy with the results. The engine parts looked sparkling clean afterwards. There’s enough product for two average-size engines, but heavy coverage might limit that. I definitely recommend this product!”

“I’ve used this on two motorcycle engines and my 2005 Civic. It works pretty well; the engines look much cleaner, though not absolutely sparkling. It helped me see if my Civic still had an oil leak after I fixed it. I apply this product before rinsing with soapy water from a pressure washer. It’s been effective on all my vehicles, and I feel confident using it.”

“I was excited to use this product until I found the spray nozzle missing. It was frustrating, but I made it work with a different nozzle. The product itself worked well on my motorcycle, though the application was messy without the right nozzle. I hope this isn’t a common issue.”

"I used this product on a cold engine with just a paper towel, and the results were fantastic. The parts I cleaned looked great, and I can only imagine how well it would work if used properly. Great product, I'm glad I purchased it!"

"I cleaned my boat motor, which wasn't too dirty. This product did an excellent job removing light grime, leaving everything looking new. However, the belt filings were a bit stubborn, so I had to use a brush for best results. Overall, it met my expectations."

"I was nervous about spraying my engine, but this product amazed me with its ease of use. After about five minutes of letting it sit, I rinsed it off, and the dirt just fell away. This cleaner saves a lot of time and effort! I'm definitely a fan!"

"I've tried numerous engine dressings over the years, and I must say, this one is among my favorites when applied correctly. The key is to avoid over-application, which can cause dust and gunk buildup. After cleaning my engine bay, I lightly mist the product from a distance. Initially, it looks wet and greasy, but after some time, it dries to a beautiful satin sheen. It truly makes my engine look brand new!"

"My father loves cleaning engines for the whole family. It brings him joy, and our engines look fantastic, which makes us feel like we’re taking care of our cars. He’s in his 90s and finds this product very easy to use. I always order at least six cans at a time because it works so well!"

"After using this product, I found the smell to be quite bothersome, and neither my girlfriend nor I liked it. Once I cleaned the engine bay, some of the smell lingered in the cab. However, I have to admit, the engine bay looked amazing and had a great shine. If you're okay with a bit of a lemon scent, you’ll likely enjoy the results!"

“I couldn't believe how well it worked; it cleaned my engine beautifully. Amazing!”

“Using this on my 1986 Mercedes 420 SEL was fantastic; combined with a good brush, it really transformed my engine bay.”

“I applied it for the first time and let it soak for about 10 minutes before power washing. My engine compartment looks like new! I highly recommend this product.”

"This product absolutely works for cleaning engines and surrounding areas. I had an oil leak on my mower and used about half a can to soak it. The longer it sits, the better it works, especially in cooler temps. I rinsed it off with a garden hose, and it left no trace on my asphalt driveway."

"I've tried many degreasers over the last 30 years, but this is the very best. It really gets the job done!"

"I used this to clean the undercarriage after a significant oil leak. It performed as well as Gunk and worked great for me."