10 Best Engine Treatments 2025 in the United States

The Lucas Oil 10002 Heavy Duty Oil Stabilizer is a reputable product with a strong track record, boasting a high customer rating of 4.8 out of 5 stars from over 8,000 reviews. Manufactured by Lucas Oil, a well-known brand, this stabilizer is compatible with multiple vehicle types, making it versatile for various engines. It is designed to extend the life of your engine oil by at least 50%, reduce oil consumption, prevent dry starts, raise oil pressure, and ultimately increase both power and fuel efficiency.

These features can be particularly beneficial for those looking to enhance their engine's longevity and performance without frequent maintenance. However, it's important to note that the product requires consistent use, which might be a consideration for those who prefer low-maintenance solutions. Additionally, while the pack of four 1-gallon containers offers good value, the total weight of 31.4 pounds might be cumbersome for some users to handle.

Nonetheless, given its high ranking in the automotive category and positive reviews, Lucas Oil 10002 is a solid choice for anyone looking to improve their engine's performance and reliability.

The Liqui Moly Pro-Line Engine Flush is a 500 ml oil additive designed to clean and flush the oil systems of both gasoline and diesel engines. This treatment is known for its gentle yet rapid cleaning capabilities, which are neutral to seals and other engine components. It's also compatible with catalytic converters, making it a versatile choice for various vehicles, including buses and trucks.

One of the main strengths of this product is its ease of use, which makes it accessible even for those who may not be particularly handy with cars. A key advantage is its high customer rating—4.7 out of 5 stars from over 8,000 reviews, indicating strong user satisfaction and effectiveness. The brand, Liqui Moly, has a good reputation in the automotive industry, further supporting the product's credibility.

However, one potential drawback is that it is specifically tailored for larger vehicles like buses and trucks, which may limit its use for regular passenger cars. Also, the product has a flash point of 63 degrees Celsius, suggesting it should be handled with care to avoid any fire hazards. For those looking for a reliable engine treatment that is easy to apply and effective for larger vehicles, the Liqui Moly Pro-Line Engine Flush is a strong contender.