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Updated: 06 Apr 2026

10 Best Engine Flushes

#1 Best Pick
Penrite Engine Flush Additive 375 ml

Penrite Engine Flush Additive 375 ml

Brand: Penrite
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  • Contains zinc for added wear protection
  • Fast acting, cleans in 10 minutes
  • Solvent free to prevent engine seal damage
  • Designed for use in all engine types in passenger cars
  • Safe to use in all petrol, LPG and diesel engines
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#2 Best Value
Boat Engine Flush Mixer Liquid Flow Valve for Salt Remover, Ideal to Flush Outboard and Inboard Engines Connects with Garden Hose, Spray Nozzle, Engine Flusher (Yellow)

Boat Engine Flush Mixer Liquid Flow Valve for Salt Remover, Ideal to Flush Outboard and Inboard Engines Connects with Garden Hose, Spray Nozzle, Engine Flusher (Yellow)

Brand: Smpasski
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  • 【Flush Mixer】: it is simple and convenient to use salt remover solution; It can be used in conjunction with garden hoses and engine flushing devices or nozzles
  • 【Thicker Material】which makes the leakage less; The connection is tight, and the water leakage is not easy
  • 【2 Option Switch】: water and soap dual function design can control the water flow or remove the salt solution to the surface to be treated, bring much convenience to your life
  • 【Salt Deposits Remover】Marine Engine Flushing Mixer can be used to remove salt deposits on glass fiber, metal, vinyl, plastic and painted surfaces, as well as fishing and diving equipment
  • 【Wide Applications】: suitable for boats, RVs, campers, trailers, ATVs, cars, trucks, jet skis, motorcycles, fishing equipment, diving equipment, snow plows, salt tankers, etc
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#3 Budget Pick
YIGZYCN Engine Flush Mixer, Liquid Cleaning Hose, Nozzle Solution Dispenser with Garden Hose

YIGZYCN Engine Flush Mixer, Liquid Cleaning Hose, Nozzle Solution Dispenser with Garden Hose

Brand: YIGZYCN
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  • Our engine flash solution dispenser delivers a thorough clean. Easy to install and remove, convenient for vehicle owners
  • Our cleaning nozzles are effective for your vehicle. It is adjustable to meet your various needs and ensures efficient cleaning
  • Our solution dispenser is the perfect tool for vehicle maintenance whether you're a hobbyist, professional or home user
  • Whether you are attending trade shows or running a car wash business, our solution dispenser is an essential accessory to keep your vehicle looking its best
  • Detachable design for convenience Quick connect function makes it easy to connect to water hose, practical for a variety of tasks
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#4 Top Choice
Mannol Motor Engine Flush 300 ml

Mannol Motor Engine Flush 300 ml

Brand: MANNOL
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  • Cleans the oil system and filter nets of oil pumps
  • Provides reliable lubrication, preventing wear of engine parts
  • Removes both oil-soluble and non-oil-soluble contaminants
  • Cleaning is gentle for all parts and components of the engine and does not harm them
  • Completely removed from the system along with old oil
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#5 Popular Choice
Salt Attack Salt Remover Engine Flush Concentrate 4L

Salt Attack Salt Remover Engine Flush Concentrate 4L

Brand: Salt Attack
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  • Non-toxic, non-hazardous, biodegradable formula designed for NZ/AU conditions
  • Removes salt build-up
  • Best engine protection
  • Jetski/PWC, 4x4 wash, house wash
  • Super concentrate 1:500
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#6 Top Pick
LIQUI MOLY Engine Flush Plus | 300 ml | Oil additive | SKU: 2784 (Pack of 2)

LIQUI MOLY Engine Flush Plus | 300 ml | Oil additive | SKU: 2784 (Pack of 2)

Brand: Liqui Moly
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  • The information below is per-pack only
  • A specially formulated combination of additives and carrier fluid
  • The highly effective detergent and dispersant additives dissolve sludge and lacquer formers
  • Simple to use without disassembly
  • Optimal engine performance
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#7 Top Pick
Salt Attack Salt Remover Engine Flush Concentrate 2L

Salt Attack Salt Remover Engine Flush Concentrate 2L

Brand: Salt Attack
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  • Non-toxic, non-hazardous, biodegradable formula designed for NZ/AU conditions
  • Removes salt build-up
  • Best engine protection
  • Jetski/PWC, 4x4 wash, house wash
  • Super concentrate 1:500
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#8 Top Pick
Salt Shift Marine Engine Flush 1 Liter

Salt Shift Marine Engine Flush 1 Liter

Brand: Salt Shift
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  • Specifically formulated to flush out salt and debris from marine engines
  • Provides ample quantity for multiple flushes
  • Prevents the accumulation of salt and mineral build-up in cooling systems
  • Removes harmful salt deposits that can lead to corrosion and engine damage
  • Simple application process for hassle-free maintenance
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#9 Top Pick
Nulon Engine Oil Flush 300 ml

Nulon Engine Oil Flush 300 ml

Brand: Nulon
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  • Extends engine life
  • Helps free up sticky valve lifters
  • Keeps oil strainer and pick-up clean
  • Cleans and removes sludge, dirt and varnish
  • Provides a cleaner environment for new oil
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#10 Top Pick
LIQUI MOLY Engine Flush Plus | 300 ml | Oil additive | SKU: 2784

LIQUI MOLY Engine Flush Plus | 300 ml | Oil additive | SKU: 2784

Brand: Liqui Moly
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  • A specially formulated combination of additives and carrier fluid
  • The highly effective detergent and dispersant additives dissolve sludge and lacquer formers
  • Simple to use without disassembly
  • Optimal engine performance
  • Does not attack common sealing materials
Check latest price on Amazon

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