10 Best Engine Additive of December 2025

• 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

• High Mileage solution to protect against power robbing friction heat and wear
• Restores performance in engines due to wear and oil consumption in older engines
• Revitalizes seals to help stop oil leaks and prevent them from ever occuring
• Powerful detergents to remove and prevent oil sludge, use during your next oil change or between changes to replace lost additive content
• Powerful detergents to remove and prevent oil sludge, use during your next oil change or between changes to replace lost additive content
• This product is dispensed in 10W-30 which is a multi-grade oil but is fully compatible with all multi grade motor oils and mono grade oils. It is fully compatible with all conventional, semi-synthetic and full synthetic oil types.

Slick 50

• Reduces friction and wear
• Quiets noisy lifters and valves
• Removes and prevents sludge
• Add to engine oil anytime
• Will not void manufacturer's new vehicle

Rislone

• BESTLINE ENGINE TREATMENT: Increase power/gas mileage.
• REDUCES FRICTION: Diamond Nano-lubricant noise remover additive creates boundary layer protection on metal
• UNIVERSAL BESTLINE ADDITIVE: 100% Pure Synthetic use in gas or diesel car, truck, motorcycle engines
• OIL ADDITIVE: Use 1 bottle for every 5 quarts of oil for smoother starts & maximum engine protection
• TRY IT WITH CONFIDENCE: BestLine Engine Oil Treatment comes with a 100% money back guarantee

BestLine Superior Lubricants

• GROUNDBREAKING: Made in the USA – TriboTEX is a revolutionary engine oil additive. It contains synthetic nanoparticles developed with funding from the U.S. Department of Energy, NASA, & the National Science Foundation.
• QUIETER & SMOOTHER PERFORMANCE: Reverses wear in bearings by building a diamond-like carbon coating.
• UNIVERSAL: Compatible with all types of motor oil and can be used in gas or diesel engines. Use for both old and new cars. It is an excellent engine booster.
• EFFICIENT: Our masterfully engineered engine treatment improves fuel consumption and reduces engine noise. It is time to improve your engine and take your driving experience to a new level.
• GUARANTEED QUALITY: We know you will be delighted with this ground-breaking technology. Our treatment comes with a 100% satisfaction guarantee.

TriboTEX

• Motor oil additive - Liqui Moly MoS2 anti-friction (300 ml. Can)
• Forms High load-bearing film of lubricant on all friction surfaces
• You will be surprised at how much better your engine sounds and how controlled it will be even at very high RPM

Liqui Moly

• Prevents camshaft wear
• Reduces piston scuffing
• Increases engine life
• Makes newer oils work in older engines

Hy-per Lube by Rislone

• Restores cylinder compression
• Restores horsepower
• Restores engine performance
• Reduces oil consumption

Restore

• 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

• The product is 32oz hd oil stabilizer
• Easy to use, increases power and miles per gallon
• Made in USA, increase oil life at least 50 percent longer

LUCAS