Best Engine Cleaners of 2026

"I've tried many degreasers, but this one stands out for its instant effectiveness and ease of use. It makes cleaning so much faster, and I'm planning to buy it again!"

"As a mechanic, I've used countless degreasers, and this Chemical Guys product is the best I've found. If you don’t dilute it, it’ll tackle even the toughest grime. Just be careful with your skin—it really pulls out the oils! Highly recommend for heavy-duty cleaning."

"I diluted it as instructed and was impressed with how well it cleaned up grease and dirt. No scrubbing needed for most spots, and it rinses off easily with a nice smell. Very happy with the results after using it on my vehicle."

"I was honestly impressed by how well this product tackled years of grime on my marine diesel engines. Application was straightforward, and after a short wait and some light scrubbing, the results were better than any other water-based degreaser I’ve tried. Totally happy with the outcome and plan to use it elsewhere."

"I used this on my Motorhome after a transmission fluid leak, mixing it at a 4:1 ratio. To my surprise, the grease dissolved almost instantly and rinsed off with ease. This stuff really works—it’s the real deal for tough cleaning jobs."

"For the price, this product outperforms more expensive options like Gunk. A little goes a long way and it gets the job done. I’m definitely satisfied with the value and effectiveness."

"I've used this for years and it's fantastic for cleaning oil, grease, and even kitchen messes from all types of fabrics. Not only does it keep my work clothes and towels spotless, but it also leaves my washer and dryer smelling fresh, which keeps my spouse happy."

"After struggling to get rid of the diesel smell from my gear, I tried this detergent and it completely eliminated the odor. The only thing I didn't love was the cap, which cracked during shipping, but the cleaning power made up for it."

"As a mechanic, this is by far the best laundry detergent I've found for removing grease and grime from my uniforms. It even tackles tough, long-term stains, although sometimes it takes a couple of washes—still, I'm impressed!"

"I was skeptical at first because the tool felt very lightweight, and I’m used to heavier ones. But after assembling it and adding an air fitting, I tested it out with water and soap. It worked great, had strong air pressure, and cleaned my parts efficiently. I’ll definitely pick up more when needed."

"For the price, this tool is an amazing deal. I used it to clean my three-piece wheels and it worked perfectly, getting into all the little crevices. I wish the tip was finer, but overall, for under $20 for two, this is a five-star value."

"I bought this siphon gun mainly for spraying degreaser in tight engine bay spots, but the one I received leaked, the hose slipped, and the spray was inconsistent—either barely a trickle or a sudden blast. Despite checking all the connections and air pressure, it was just a mess. Maybe mine was faulty, but I had to return it."

"I was amazed at how quickly and easily this cleaner got rid of stubborn grease and stains. It made my cleaning routine so much faster, and I’ve already recommended it to my family and friends. I’ll keep buying it—it's a staple for me now!"

"At our auto detail shop, we rely on this product for everything from engine compartments and wheels to tools. It’s strong on caked-on oil but gentle enough for rubber and plastic, so it’s safe to use in lots of areas. Easy rinse-off is a big plus!"

"I chose this degreaser because I wanted something versatile and eco-friendly, and it really delivered. It handled everything from greasy kitchen counters to sunscreen stains on my car seats, and the fresh citrus scent isn’t overpowering. I love that a little goes a long way—definitely worth the price. I’ll be repurchasing for sure!"

"I was impressed by how quickly and thoroughly this product cleaned my car. The process took about 30 minutes, and the results were great. I wish I had a before picture to show the difference."

"The spray is super convenient—just spray and leave it, no rinsing at all. The only thing is, you need to let your car sit for four hours before driving. Still, I'm telling all my friends about it, it's that good!"

"Just a heads up: if you don't wash it off well after use, it might create a brief smell that can be confusing, but it's nothing serious and goes away quickly."

"I've tried a lot of grease on my truck, but this one stands out for its incredible sticking power and long-lasting durability. It doesn't leak, holds up well, and is a solid value. Honestly, I'd recommend it to anyone with a truck."

"I picked up this grease for my RV hub service and found it to be reliable and a great deal. It seems to hold up really well, so I feel confident using it on my vehicle."

"My husband uses this grease nonstop for his discs and finishers. He's especially impressed by how long it lasts and how well it protects the bearings. It's definitely become his go-to choice."

"I've been loyal to WD-40 for years, but this was my first time trying their degreaser. It handled my engine cleaning perfectly, leaving it impressively spotless. The product shipped quickly and was well packaged. I'll definitely recommend it, and I'll update if anything changes over time."

"After fixing a valve cover leak, I had over two years of oil buildup to deal with. This degreaser foamed up, turned brown, and basically melted the grime away without needing a brush. The scent was unexpectedly pleasant, and the spray reached all the tricky spots. I'm very pleased and plan to order more."

"I was skeptical at first, but it easily cleaned the oil and gunk around my oil filter in minutes, no scrubbing required. All I had to do was rinse it off and my engine looked shiny and clean underneath."

"I was amazed at how well this cleaner worked on my neglected acrylic tub. After trying several other products without success, this one finally removed years of grime and discoloration with just a few passes. I do recommend wearing a mask or ventilating the area because the fumes are pretty strong, but the results were absolutely worth it."

"I use this every spring to degrease and clean my Weber grill, and it never disappoints. It cuts through grease, mildew, and grime easily, rinses off well, and I've even used it on tools and lawn equipment. Very pleased with the cleaning power."

"This stuff is a lifesaver for cleaning sap and gunk off my chainsaw chain. I just soaked the chain, and it came out looking brand new—no scrubbing needed. Plus, a little goes a long way, so one bottle lasts a while."

"I was really impressed after using Salt Terminator on my 1981 Johnson outboard. After trying everything else, I let the solution soak for a few hours, and suddenly the water flowed perfectly again. Saved me from taking the engine apart—now I use it as part of my regular maintenance."

"After noticing build-up restricting my outboard’s cooling passages, I used Salt Terminator and followed up with a soak and flush. I was amazed at how much yellow residue it removed. Now the metal looks clean and the water runs clear. Much better than risking a blown cylinder."

"I’ve switched from Volvo-Penta’s salt eliminator to this product and found performance just as good. I use it to flush my engine and spray down all my fishing gear and trailer. It’s really extended the life and looks of my rods, reels, and engine parts. I only wish it worked a bit better, but it’s still my go-to."