10 Best Engine Sludge Remover of December 2025

• Easy way to clean and flush the oil systems of gasoline and diesel engines
• Gentle and rapid cleaning
• Neutral to seals and other materials installed in the engine
• Compatible with catalytic converters
• Simple to use

Liqui Moly

• Includes a Formula with Anti-Friction Metal Treatment Technology
• Features Engineering Designed to Treat Metal Surfaces of Both Gasoline and Diesel Fueled Engines
• Offers Molecules that Interact with Metal Surfaces and Chemically Bond to Create a Protective Layer that Reduces Damaging Friction and Heat
• Offers to Protect the Engine Even when the Motor Oil is Not Yet Fully Circulating
• Features a Formula Containing No Solid Particles Such as PTFE Resins, 'Molys', Zinc, Copper, or Graphite

Prolong Super Lubricants

• Removes scale and deposits from all marine engines
• Will not damage engine seals, gaskets or rubber impellers
• Engine seals, gaskets or rubber impellers, deposits from all marine engines
• Country Of Origin : United States

STAR BRITE

• Safely remove accumulated amounts of varnish, sludge and by-products of combustion
• For use in all diesel and gasoline engines
• Prepares engine for fresh oil
• Protects and extends oil life by 30 percent
• Optimizes engine horsepower and performance

Lubegard

• 6 x 500 Milliliter Cans
• Easy way to clean and flush the oil systems of gasoline and diesel engines
• Gentle and rapid cleaning
• Neutral to seals and other materials installed in the engine
• Compatible with catalytic converters

Liqui Moly

• Scientifically engineered to improve the oil drain for vehicles over 75K Miles
• Super concentrated cleaning agents actively clean deposits in the engine
• Helps Reduce Sludge and Varnish on Cylinder Heads
• Helps dissolve Engine Deposits
• Will not harm seals - safe to use every oil change when used as directed

STP

• The perfect solution to clean the engine from inside. Washes off oil sludge and other dirt and deposits. Increases the engine’s reliability and prevents incomplete lubrication. Lubrication holes, oil screens, piston ring grooves and ducts are gently cleaned, preventing engine damage.

Liqui Moly

• Cleans injectors, carb jets and passageways
• Cleans and lubricates intake valves, pistons and cylinders
• Dissolves and cleans fuel residue in fuel systems
• Dissolves oil deposits in crankcase
• Clean timing chain tensioners and VVT actuators, quiet noisy lifters
• 100 percent pure petroleum
• EPA registered product
• Liquefies gum and varnish deposits or internal engine contaminants
• Special Shipping Information: This item cannot be returned and has additional shipping restrictions
• Special Shipping Information: This item cannot be returned and has additional shipping restrictions

Sea Foam

• Petroleum based formula does not contain kerosene or mineral spirits.
• Made in the USA
• Will not cause leaks, plug ports, galleys or screens; for all domestic and import gasoline engines.

Golden Touch

• Use before changing oil in gas or diesel engines
• No harmful solvents to damage seals or gaskets
• Safely remove accumulated amounts of varnish, sludge and by-products of combustion
• Premium synthetic blend that contains special detergents and dispersants
• Prepares engine for fresh oil

Lubegard