Best Oil Additive For Older Engines: image
Best Overall

Lucas Oil Stabilizer, a 100% petroleum product, is formulated to eliminate dry starts and excessive wear on any engine. The product has a low oil consumption and will not sludge or varnish. It can be used in petrol engines, diesel engines, turbochargers, etc. It also reduces the friction between the oil and the piston. Notably, it was approved by the National Institute of Standards (NIST) for use in diesel engines.

Best Value

Sea Foam Motor Treatment works to dissolve and clean fuel deposits and sticky residues from gas and diesel fuel injectors, carburetors, and combustion chambers. The product is formulated using natural ingredients and contains no harsh detergent or abrasive chemicals that can harm your engine. Notably, the US government has banned the use of petroleum-based products in its vehicles. It also prevents the formation of carbon monoxide (CO2) emissions.

Most Discussed

Sf16 16oz motor tune-up. The product is registered with the Environmental Protection Agency (EPA) and has additional shipping restrictions. The product can be returned within 30 days of purchase. Notably, this item cannot be returned for any reason. It does not contain any chemicals or additives. However, it can be returned to the sender without prior approval.

Best Oil Additive For Older Engines

Top 10 Best Oil Additive For Older Engines

1
Why we chose it
  • 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
  • Features Engineering Designed to Treat Metal Surfaces of Both Gasoline and Diesel Fueled Engines
  • Includes a Formula with Anti-Friction Metal Treatment Technology
Prolong Super Lubricants PSL11000 Engine Treatment - 12 oz. , White: image
96%
customers recommend this product
4.8/ 5
Longevity4.9
Mileage4.8
Value for money4.7
2

Marvel Mystery Oil MM12R – 16 Fl Oz. (Pack of 2)

2,183 ratings | 12 offers | 2,183 Reviews
Price: $19.36$25.49
Why we chose it
  • Prevents valve sticking and clatter
  • Prevents oil breakdown caused by extreme temperatures
  • Cleans and lubricates fuel injectors and carburetors
  • Kit Includes (2) 16oz. Bottles of Marvel Mystery Oil additive
  • Reduces and prevents varnish and gum build-up
Marvel Mystery Oil MM12R - 16 Fl Oz. (Pack of 2): image
94%
customers recommend this product
4.7/ 5
Mileage4.6
Value for money4.4
Top Pick
3

Lucas Oil 10001 Heavy Duty Oil Stabilizer – 1 Quart

5,599 ratings | 55 offers | 5,599 Reviews
Price: $10.62$43.23
Why we chose it
  • Lowers engine temperature
  • Raises Oil Pressure
  • Virtually eliminates dry starts and excessive wear
  • Extends oil and engine life
  • Will not sludge or varnish
  • For use in any engine, gasoline or diesel
Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart: image
96%
customers recommend this product
4.8/ 5
Longevity4.9
Value for money4.8
Mileage4.7
4

Liqui Moly (20002) Cera Tec Friction Modifier – 300 ml

10,709 ratings | 36 offers | 10,709 Reviews
Price: $17$45.23
Why we chose it
  • Mixable with all commercially available motor oils
  • No deposits and absolutely compatible with all commonly used filter systems
  • Resists extremely high and low temperatures
  • Stable even under high thermal and dynamic permanent loads
Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml: image
94%
customers recommend this product
4.7/ 5
Longevity4.6
Value for money4.5
Noise level4.5
Mileage4.5
5
Why we chose it
  • Restores engine performance
  • Reduces oil consumption
  • Restores cylinder compression
  • Restores horsepower
Restore (00012 6-Cylinder Formula Engine Restorer & Lubricant - 12.5 oz.: image
94%
customers recommend this product
4.7/ 5
6
Why we chose it
  • Does NOT have harsh detergent or abrasive chemicals that can harm your engine
  • Country of origin :United States
  • Package dimensions :5.0″ L x5.0″ W x8.25″ H
  • Dissolves and clean fuel deposits and sticky residues from gas and diesel fuel injectors, carburetors, and combustion chambers
Sea Foam SF-16-2PK Motor Treatment Multi-Use, 16 Ounce, Pack of 2, 16. Fluid_Ounces: image
96%
customers recommend this product
4.8/ 5
Easy to use4.8
Value for money4.7
Mileage4.5
7

Marvel MM13R Mystery Oil – 32 oz.

2,183 ratings | 18 offers | 2,183 Reviews
Price: $8.49$27.97
Why we chose it
  • For best performance, follow the manufacturer’s recommendations in your vehicle owner s manual.
Marvel MM13R Mystery Oil - 32 oz.: image
94%
customers recommend this product
4.7/ 5
Mileage4.6
Value for money4.4
8

Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce

684 ratings | 1 offers | 684 Reviews
Price starts from: $15.99
Why we chose it
  • 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
  • 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.
  • High Mileage solution to protect against power robbing friction heat and wear
  • Powerful detergents to remove and prevent oil sludge, use during your next oil change or between changes to replace lost additive content
  • Restores performance in engines due to wear and oil consumption in older engines
Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce: image
94%
customers recommend this product
4.7/ 5
Longevity4.8
Value for money4.8
Mileage4.8
9

Sea Foam SF-16 Motor Treatment – 16 oz. , white

17,321 ratings | 52 offers | 17,321 Reviews
Price: $8.48$32.45
Why we chose it
  • Special Shipping Information: This item cannot be returned and has additional shipping restrictions
  • Pea registered product
  • EPA registered product
  • 100 percent pure petroleum
  • Liquefies gum and varnish deposits or internal engine contaminants
  • 100 percent pure petroleum
  • The product is sf16 16oz motor tune up
  • Easy and simple use kit
  • Special Shipping Information: This item cannot be returned and has additional shipping restrictions
  • Liquefies gum and varnish deposits or internal engine contaminants
Sea Foam SF-16 Motor Treatment - 16 oz. , white: image
96%
customers recommend this product
4.8/ 5
Easy to use4.8
Value for money4.6
Mileage4.5
10
Why we chose it
  • Excellent for flat tappet camshafts or as an additive
  • Exclusive blend of extreme pressure additives
  • Not designed for passenger car use
  • Affordable Solutions
Lucas Oil 10063 Engine Break in Oil Additive - TB Zinc Plus, 16 Ounce, Multi-Colored (LUC10063): image
98%
customers recommend this product
4.9/ 5
Mileage4.9
Value for money4.8
Top Pick
Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart
Lucas Oil Stabilizer is a 100% petroleum product formulated to eliminate dry starts and reduce friction, heat and wear in any type of engine. It allows motor oils a higher degree of lubricity which reduces oil consumption and operating temperatures.
Ranking the Brands
Prolong Super Lubricants: 10.00%
Marvel Mystery Oil: 20.00%
Lucas Oil: 20.00%
Liqui Moly: 10.00%
Restore: 10.00%
Sea Foam: 20.00%
Slick 50: 10.00%

Comparison Table

Сomparison: Prolong Super Lubricants PSL11000 Engine Treatment - 12 oz. , White: imageСomparison: Marvel Mystery Oil MM12R - 16 Fl Oz. (Pack of 2): imageСomparison: Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart: imageСomparison: Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml: imageСomparison: Restore (00012 6-Cylinder Formula Engine Restorer & Lubricant - 12.5 oz.: imageСomparison: Sea Foam SF-16-2PK Motor Treatment Multi-Use, 16 Ounce, Pack of 2, 16. Fluid_Ounces: imageСomparison: Marvel MM13R Mystery Oil - 32 oz.: imageСomparison: Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce: imageСomparison: Sea Foam SF-16 Motor Treatment - 16 oz. , white: imageСomparison: Lucas Oil 10063 Engine Break in Oil Additive - TB Zinc Plus, 16 Ounce, Multi-Colored (LUC10063): image
Prolong Super Lubricants PSL11000 Engine Treatment – 12 oz. , WhiteMarvel Mystery Oil MM12R – 16 Fl Oz. (Pack of 2)Lucas Oil 10001 Heavy Duty Oil Stabilizer – 1 QuartLiqui Moly (20002) Cera Tec Friction Modifier – 300 mlRestore (00012 6-Cylinder Formula Engine Restorer & Lubricant – 12.5 oz.Sea Foam SF-16-2PK Motor Treatment Multi-Use, 16 Ounce, Pack of 2, 16. Fluid_OuncesMarvel MM13R Mystery Oil – 32 oz.Slick 50 750002 Recharged High Mileage Engine Treatment, 15-OunceSea Foam SF-16 Motor Treatment – 16 oz. , whiteLucas Oil 10063 Engine Break in Oil Additive – TB Zinc Plus, 16 Ounce, Multi-Colored (LUC10063)
ManufacturerProlong Super LubricantsMarvel Mystery OilLUCAS OILLiqui MolyRestoreSea FoamMarvel Mystery OilSlick 50Sea FoamLUCAS OIL
BrandProlong Super LubricantsMarvel Mystery OilLucas OilLiqui MolyRestoreSea FoamMarvel Mystery OilSlick 50Sea FoamLucas Oil
Item Weight1.1 pounds2.03 pounds2.03 pounds10.6 ounces14.4 ounces2 pounds1.96 pounds1.01 pounds8 ounces1.02 pounds
Product Dimensions9 x 3.9 x 2 inches10.12 x 3.14 x 2.67 inches2.5 x 1 x 3 inches2.76 x 2.76 x 7.76 inches10 x 10 x 5 inches2.25 x 4.5 x 10.25 inches2.05 x 9.37 x 3.46 inches2.75 x 7.5 x 2.75 inches7.72 x 2.25 x 0.96 inches
Is Discontinued By ManufacturerNoNoNoNoNoNoNoNo
Size12-Ounce16 oz. (2-Pack)Quart32 oz.

Products with 5 star rating

Tips and advices on YouTube

Never Use This Type of Engine Oil Additive in Your Car
Is Synthetic Motor Oil Bad For Old Cars?
I can’t believe what Lucas Oil Stabilizer did for My Engine!

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