10 Best Engine Degreasers 2025 in the United States

The Simple Green Industrial Cleaner and Degreaser is a versatile, industrial-strength cleaning solution available in a 1-gallon bottle. This product is recognized for its powerful cleaning ability, capable of handling heavy dirt, grease, food residue, and stains on a wide range of washable surfaces such as counters, carpets, floors, machines, equipment, and vehicles. One of its standout features is its biodegradability, making it an environmentally friendly choice, as recognized by the U.S. EPA's Safer Choice Program. This means it is safer for both users and the environment compared to many conventional degreasers.

The cleaner is also cost-effective due to its concentrated formula, which allows users to dilute it according to their specific cleaning needs, thus extending the product’s usage and value. Additionally, its compatibility with various cleaning equipment, like floor scrubbers and pressure washers, adds to its practical appeal for both manual and professional cleaning tasks. However, the product's strong industrial scent of sassafras might be a drawback for those sensitive to strong odors.

Moreover, while its broad application is a plus, it may require careful handling and proper dilution to avoid potential damage to delicate surfaces. Its weight of 7.72 pounds and larger dimensions might also make it less convenient to handle for some users. This Simple Green cleaner is a robust and environmentally friendly option for heavy-duty cleaning tasks, ideal for users who need a versatile and effective degreaser for various surfaces but can manage its strong scent and the need for proper dilution.

The 3D Orange Degreaser is a versatile and organic citrus-based cleaner designed for multiple surfaces, including plastic, metal, vinyl, leather, and carpet. It's especially useful for both interior and exterior uses, making it a handy product for car maintenance. One of its significant strengths is its cleaning power without leaving any residue or stains, which is crucial for maintaining the appearance of your surfaces.

Its biodegradability and safety for various materials highlight its user and environmentally friendly aspects. The citrus scent is a pleasant bonus, especially for those who prefer natural fragrances over chemical odors. However, as a general-purpose cleaner, it might not replace heavy-duty commercial degreasers for more stubborn grime and grease.

This product is well-suited for individuals looking for a safe, organic, and multifunctional degreaser for regular maintenance, especially within the automotive sector.

The WD-40 Specialist Machine & Engine Degreaser Foaming Spray is a powerful cleaning solution ideal for removing oil, dirt, grime, and grease from various types of engines and machinery. Its water-based, low-residue foaming formula ensures deep penetration into hard-to-reach areas, making it effective for comprehensive cleaning. This product is versatile, suitable for auto and truck engines, industrial machinery, and farm equipment, which makes it a great all-around choice for different users.

The spray nozzle can reach up to 5 feet, allowing for easy application over a larger area, while the included straw offers precision for more targeted cleaning tasks. Independent tests have shown it outperforms leading competitors in effectiveness. However, there are a few considerations to note. The product is not biodegradable, which could be a concern for environmentally conscious users. Additionally, while the spray form is convenient, some users might find it challenging to control in windy conditions. Also, it is unscented, which is great for those who prefer no added fragrances, but others might miss a fresh scent after cleaning. The product is recyclable, adding a positive note on environmental impact in that regard.

In summary, it is a robust and effective degreaser with a few minor drawbacks, making it a strong candidate for anyone in need of a reliable engine and machinery cleaning solution.