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10 Best Engine Flush in The UK

Last updated on 07/07/2025
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Best Choice
1
9.9
Exceptional
Save 4%
Carlube Flushing Oil, SAE 20, 4.55 L
Carlube
Carlube Flushing Oil, SAE 20, 4.55 L
4% Off
Why We Love It
  • Removes harmful deposits effectively.
  • Protects engine during cleaning.
  • Suitable for multiple engines.
Main Highlights
  • The best grade mineral base oils and detergent/dispersant additives were used in the formulation of Carlube Flushing Oil to create a flushing oil with a wide range of applications.
  • Helps remove harmful deposits and sludge
  • Contains anti-wear additive to protect engine during cleaning
  • Suitable for petrol and diesel engines
  • Carlube oils are high specification oils designed to meet the increasing market demand for high quality but affordable engine oils.
9.9
Exceptional
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Best Value
2
9.8
Exceptional
Save 4%
Liqui Moly 2425 Pro-Line Engine Flush, k.A.
Liqui Moly
Liqui Moly 2425 Pro-Line Engine Flush, k.A.
4% Off
Why We Love It
  • Improves engine efficiency.
  • Reduces noise.
  • Increases vehicle reliability.
Main Highlights
  • Cleans the engine from the inside. Removes deposits from lubrication holes, oil screens, piston ring zone, etc. Reduces engine noise and oil consumption. Improves compression. Increases vehicle's reliability.
  • Cleaning and flushing out the oil systems of petrol and diesel engines.
  • One 500 ml can is sufficient for up to 5 litres of oil. Add Pro-Line Engine Flush to the engine oil at running temperature before changing the oil. After adding the product, allow the engine to idle for approx.
  • 10 to 15 minutes depending on the degree of contamination. Then change the oil and the filter. Pro-Line Engine Flush is compatible with all commercially available engine oils Note: Not suitable for use on motorbikes with wet clutches.
9.8
Exceptional
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3
9.7
Exceptional
Liqui Moly 2x Pro-Line Engine Flush, 500ml each
Liqui Moly
Liqui Moly 2x Pro-Line Engine Flush, 500ml each
Why We Love It
  • Boosts vehicle engine performance.
  • Enhances overall vehicle reliability.
  • Promotes smoother vehicle operation.
Main Highlights
  • Liqui Moly ProLine engine oil additive
9.7
Exceptional
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4
9.7
Exceptional
Save 10%
LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1
Liqui Moly
LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1
10% OffFree Shipping
Why We Love It
  • Smoother engine performance guaranteed.
  • Certified effectiveness with TÜV Thüringen.
  • Extends engine's lifespan significantly.
Main Highlights
  • SMOOTHER ENGINE PERFORMANCE FROM VERY FIRST USE: An engine additive formulated with high-tech ceramic compounds, high thermal resilience. Additive ensures smoother-running engine, extending the engine’s lifespan. Can be used with manual & automatic transmissions. Not suitable for use with wet clutches.
  • LOWER FUEL CONSUMPTION and diminished emission of pollutants due to smoother engine operation.
  • EASY TO ADD DURING OIL CHANGES: The 300 ml bottle is sufficient for up to 5 liters of engine oil. Shake well before use and add to fresh oil. Can be mixed with all gear & engine oils on the market. Long-lasting performance, up to 50,000 km.
  • CERTIFIED EFFECTIVENESS proven by TÜV Thüringen: Chemical components in Cera Tec smooth out rough surfaces, the ceramic particles fill in uneven surface imperfections. Prevents direct contact of all metal parts, reducing friction and wear & tear. Turbo & Cat tested.
  • EVERYTHING THAT DRIVES WORKS BETTER WITH LIQUI MOLY: We manufacture over 4,000 products: engine oils, additives, vehicle care, chemical servicing and repair, adhesives and sealing products. Our products are currently distributed to over 150 countries worldwide. They are popular everywhere, ensuring a superior driving experience and improved engine performance.
9.7
Exceptional
Save 10%
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5
9.5
Superb
Save 17%
LIQUI MOLY 5200 Oil Sludge Flush 300 ml
Liqui Moly
LIQUI MOLY 5200 Oil Sludge Flush 300 ml
17% Off
Why We Love It
  • Cleans engine from inside.
  • Prevents engine damage effectively.
  • Improves operational reliability.
Main Highlights
  • The fine solution for cleaning the engine from the inside
  • Washes the black build-up and other dirts and deposits
  • For all commercially available motor oils in petrol and diesel engines with and without diesel particle filters Turbo and catalytic converter tested
  • Not for motorcycles with wet clutches
  • The perfect solution for cleaning the engine from the inside
  • Removes black sludge and other contaminants and deposits
  • Increases the operational reliability of the engine and prevents lubrication deficiency
  • Gently cleans oil holes, oil screens, piston ring grooves and ducts and prevents engine damage
9.5
Superb
Save 17%
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6
9.4
Superb
3 x STP Engine Flush 450ml - for Petrol and Diesel Engines
Fastcar
3 x STP Engine Flush 450ml - for Petrol and Diesel Engines
Why We Love It
  • Boosts engine performance significantly.
  • Ensures cleaner, smoother operation.
  • Ideal for varied engines.
Main Highlights
  • Neutralises harmful engine acids
  • Unsticks internal engine components
  • Removing contaminants left behind by draining
  • Suitable for petrol and diesel engines
  • 3 x 450ml bottles
9.4
Superb
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7
9.3
Superb
Forte Lubricants Advanced Formula Car Engine Motor Oil Flush - 400ml
Forte
Forte Lubricants Advanced Formula Car Engine Motor Oil Flush - 400ml
Free Shipping
Why We Love It
  • Neutralises acids, ensures clean engine.
  • Restores lost engine power.
  • Keeps new oil cleaner longer.
Main Highlights
  • Neutralises crankcase Acids. Removes lacquer, varnish, sludge and insoluble deposits from the crankcase.
  • Frees sticking Variable Valve Timing systems, Hydraulic Valve Lifters and Piston Rings.
  • Stabilises cylinder compression restoring lost engine power.
  • Cleans engines internally and provides anti-wear protection.
  • Cleans oilways ensuring oil flow to critical moving parts. Keeps new oil cleaner for longer.
9.3
Superb
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8
9.1
Superb
Prestone Coolant Flush, Engine Coolant Flush For Car To Prevent Problems & Maximise Performance, Car Coolant Flush With Advanced Cleaner To Dissolve Corrosion & Scale, Safe For All Engines, 1 Litre
PRESTONE
Prestone Coolant Flush, Engine Coolant Flush For Car To Prevent Problems & Maximise Performance, Car Coolant Flush With Advanced Cleaner To Dissolve Corrosion & Scale, Safe For All Engines, 1 Litre
Free Shipping
Why We Love It
  • High performance coolant flush.
  • Advanced cleaner included.
  • Universal coolant compatibility.
Main Highlights
  • HIGH PERFORMANCE COOLANT FLUSH: Prestone Engine Coolant Flush is a simple solution that can be used at home to get rid of deposits and build up in the cooling system, helping to prevent problems and extend the life of your engine.
  • CONTAINS ADVANCED CLEANER: Our car Coolant Flush has been developed by the experts at Prestone to keep your engine at peak performance. It contains an advanced cleaner that eliminates scale, corrosion, silicate deposits and oil & fuel contamination. Perfect for cleaning up after a blown head gasket, or to restore cabin heat in vehicles that use Silicate based Antifreeze like VW G12++ and G13 Coolant
  • UNIVERSAL ENGINE COOLANT: This Cooling System Flush is safe for all engines and all cooling system components including: All antifreeze and car coolant fluid, as well as all engine metals, gaskets, plastics and hoses.
  • 10 YEAR PROTECTION: Enjoy an industry-leading 10 year guarantee with our Coolant Flush. Flush and refill with Prestone Antifreeze Coolant for a longer engine life. This 1 Litre bottle is enough to flush the whole system with just one application.
  • OVER 90 YEARS OF EXCELLENCE: At Prestone, we have spent nearly a century offering solutions to your car troubles to make your life stress free. If you want the perfect solution to protect your vehicle and maximise performance, we have what you need.
9.1
Superb
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9
9.0
Superb
Liqui Moly 1657 Motorbike Engine Flush 250 ml Can Sheet Metal
Liqui Moly
Liqui Moly 1657 Motorbike Engine Flush 250 ml Can Sheet Metal
Why We Love It
  • Effective engine cleaning solution.
  • Dissolves troublesome deposits quickly.
  • Combats sludge and lacquer.
Main Highlights
  • Content: 250ml
  • Cleaning fluid for clearing the engine interior of troublesome deposits
  • Dissolves sludge and lacquer formers
9.0
Superb
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10
8.8
Excellent
1x DWChemicals TEC 2000 Engine Flush Engine Cleaner for Petrol Diesel or Gas Engines 375 ml Fuel Additive for System Cleaning Engine Care Additive (1)
DWChemicals
1x DWChemicals TEC 2000 Engine Flush Engine Cleaner for Petrol Diesel or Gas Engines 375 ml Fuel Additive for System Cleaning Engine Care Additive (1)
Why We Love It
  • Removes harmful engine contaminants.
  • Cleans critical engine components effectively.
  • Improves engine performance significantly.
Main Highlights
  • Removes sludge, varnish, carbon and other contaminants from the crankcase
  • Cleans carbon and varnish from piston ring-grooves and piston rings
  • Raises compressions
  • Improves piston ring seal and reduces oil consumption
8.8
Excellent
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