10 Best engine flushes of 2025

Explore top picks

Best Choice

1

Liqui Moly

Liquimoly 2037 Pro-Line Engine Flush, 500 ml, 6 Pack
9.8

Exceptional

Our Rating
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Value for Money

2

Generic
Liquii Moly Pro-Line Engine Flush (500 ML) - 3 PACK
Main highlights

Efficient Engine Cleaning
Liqui Moly Pro-Line Engine Flush provides a quick and thorough cleaning of both gasoline and diesel engines, ensuring optimal performance.

Versatile Use Cases
Ideal for use in both gasoline and diesel engines, compatible with catalytic converters, and gentle on engine seals.

Customer Favorite Feature
Customers praise its ability to clean without damaging engine components or affecting catalytic converters.
Key specs
- performance:Gentle and rapid cleaning
- engine protection:Neutral to seals
- compatibility:Compatible with catalytic converters
- size:N/A
- application:N/A
9.6

Exceptional

Our Rating
3

Liqui Moly
Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037
Main highlights

Efficient Engine Cleaning
Liqui Moly Pro-Line Engine Flush ensures gentle and rapid cleaning, maintaining engine health without damaging seals or materials.

Ideal for High-Mileage Vehicles
Perfect for gasoline and diesel engines, especially older models prone to oil sludge and carbon buildup.

Notable Customer Praise for Performance
Customers frequently commend the product for improving engine smoothness and reducing oil consumption.
Key specs
- Function:Clean and flush oil systems
- Volume:15.2 ounces
- Cleaning:Neutral to seals
- Ease of Use:Simple to use
- Performance:Gentle and rapid cleaning
9.4

Excellent

Our Rating

9.7
Simple to use

9.3
worth the money

9.1
Sheerness
4

Liqui Moly
Liqui Moly Engine Flush Plus 300ml
Main highlights

Key Features and Benefits
The product offers superior durability, user-friendly design, and exceptional performance, making it a reliable choice for various needs.

Ideal Use Cases
Perfect for both indoor and outdoor activities, versatile enough for professional and personal use.

Praised Feature from Reviews
Customers frequently commend the product's outstanding quality and excellent performance, highlighting its reliability and effectiveness.
9.2

Excellent

Our Rating

9.7
worth the money

9.7
materials Quality

9.7
lasts a long time
5

MAATSEN
Liquii Moly Pro-Line Engine Flush (500 ML) - 2 PACK with Maatsen Nitrile Disposable Gloves
Main highlights

Efficient Engine Cleaning
Provides a gentle and rapid cleaning of oil systems for both gasoline and diesel engines, ensuring optimal performance.

Versatile Compatibility
Ideal for vehicles with catalytic converters, offering safe and effective use without damaging engine seals or materials.

Customer Satisfaction
Praised for its ease of use and effective cleaning, earning a perfect 5-star customer review rating.
Key specs
- package dimensions:7.99 x 5.87 x 3.15 inches
- oem part number:2427
- flash point:N/A
- container type:N/A
- viscosity:N/A
9.1

Excellent

Our Rating
See Today’s Deals & Prices
6

Liqui Moly

Liqui Moly motorspulung 500ML (2427) PRO LINE Engine Flush
8.9

Very Good

Our Rating
7

Engine Wizard

Engine Wizard - Engine Flush, Deep Clean & Protect, Removes Sludge | Engine Oil Additive (1 fl. oz)
8.8

Very Good

Our Rating
8

BlueDevil Products

BlueDevil Products Motor Flush - 1 Quart
8.5

Good

Our Rating
9

Gunk
Motor Flush 5 Min 32 fl oz (3 Pack)
Main highlights

Effective Engine Cleaner
Really great way to flush out built-up gunk in your motor and delivers on its promises.

Ideal for High-Mileage Vehicles
Perfect for vehicles with significant mileage, such as a Hyundai Elantra with 150,000 miles or a RAV 4 with 250,000 miles.

Increases Oil Pressure
Most customers praised the product for significantly increasing oil pressure and resolving warning lights and alarms.
8.4

Good

Our Rating
10

BG
BG109 Compression Engine Performance Restore BG EPR
Main highlights

Key Features
Enhances hydraulic component function, prevents oil loss, and dissolves deposits in piston rings for optimal engine performance.

Ideal Use Cases
Perfect for vehicles with turbochargers or valve train actuators and cars suffering from excessive oil consumption or deposit buildup.

Customer Reviews
Most praised for significantly improving engine performance and efficiency, with noticeable results in older vehicles.
Key specs
- performance:N/A
- engine protection:N/A
- compatibility:N/A
- size:3 x 3 x 5 inches
- application:Valve train actuators
8.2

Good

Our Rating

9.9
Simple to use

9.3
worth the money

9.1
distance

10 Best engine flushes of 2025

1

Liquimoly 2037 Pro-Line Engine Flush, 500 ml, 6 Pack

How do we rank?

How do we rank?

Analyzing top stores

2

Liquii Moly Pro-Line Engine Flush (500 ML) - 3 PACK

3

Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037

9.7

9.3

9.1

4

Liqui Moly Engine Flush Plus 300ml

9.7

9.7

9.7

5

Liquii Moly Pro-Line Engine Flush (500 ML) - 2 PACK with Maatsen Nitrile Disposable Gloves

6

Liqui Moly motorspulung 500ML (2427) PRO LINE Engine Flush

7

Engine Wizard - Engine Flush, Deep Clean & Protect, Removes Sludge | Engine Oil Additive (1 fl. oz)

8

BlueDevil Products Motor Flush - 1 Quart

9

Motor Flush 5 Min 32 fl oz (3 Pack)

10

BG109 Compression Engine Performance Restore BG EPR

9.9

9.3

9.1

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