Best Engine Oil Stop Leak in 2022 (Reviews and Comparison)

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Engine maintenance is essential to keeping your vehicle in good running order and having a good engine stop oil is part of this maintenance process. The best engine stop oil is specially formulated to stop and seal motor oil leaks caused by normal engine wear and age. 

In addition to stopping leaks, it also prevents them by conditioning and restoring gaskets and seals. Basically it is a “magic” liquid that can prolong your engine life if you find the right one. 

We have compiled a list of the best engine oil stop leak to give you all the info you need to find the ideal option for your vehicle to keep it running smoothly for as long as possible. 

COMPARISON CHART

IMAGE PRODUCT
Bar's Leaks 1010 Engine Oil Stop Leak Concentrate, 11 oz, 1 Pack, Grey 1. Bar’s Leaks 1010 Engine Oil Stop Leak
  • Easy to use
  • Versatile, works for a range of vehicles
  • Prevents future leaks
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Lucas Oil 10278 Engine Oil Stop Leak, 1 Quart 2. Lucas Oil Engine Oil Stop Leak additive
  • Works well on small leaks
  • Renews worn seals
  • Reduces engine noise
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LM 1005 Oil Leak Stop 300 ml 3. LM 1005 Oil Leak Stop 300 ml
  • Stops leaks over time
  • Halts smoke from oil leaks
  • Clear on what the product works on
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ATP AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle 4. ATP AT-205 Re-Seal Stops Leaks
  • Fast acting
  • Effective sealant
  • Good compatibility
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STP High Mileage Oil Treatment, Formula for Cars & Truck, Stop Leak, Bottles, 15 Fl Oz, 15604B 5. STP High Mileage Oil Treatment
  • Very affordable
  • Use across a range of vehicles
  • Works well across weather and driving conditions
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1. Bar’s Leaks 1010 Engine Oil Stop Leak

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Bar's Leaks 1010 Engine Oil Stop Leak Concentrate, 11 oz, 1 Pack, Grey

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Bar's Leaks 1010 Engine Oil Stop Leak Concentrate, 11 oz, 1 Pack, Grey

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Bar's Leaks 1010 Engine Oil Stop Leak Concentrate, 11 oz, 1 Pack, Grey

Specification

BrandBar’s Leaks
Vehicle Service TypeCar
Liquid Volume325 Milliliters
Item Dimensions LxWxH1.8 x 3 x 6.5 inches
Item Weight11.3 ounces
WarrantyContact manufacturer for warranty details

Features

  • Applicable to both diesel and gasoline.
  • Good to use on small and large systems.
  • Fast effective and affordable
  • Excellent compatibility
  • Easy to use

Bar’s Leaks Engine Oil Stop Leak Concentrate is specially formulated to stop and seal motor oil leaks caused by normal engine wear and age. It not only stops leaks, but also prevents them by conditioning and restoring gaskets and seals.

WHAT WE LIKE

This engine oil stop leak is easy to use if you know how to pop your hood and you can use this solution. This solution stops and seals engine motor oil leaks in record time. Works with a variety of vehicle types adding to it’s versatility. It restores gaskets and seals to prevent future leaks as well which is a huge plus. It is an affordable option for the everyday driver. 

WHAT WE DONT LIKE

For bigger leaks this engine oil stop leak can only slow the leak down a full repair will likely be necessary. You will need to use this engine oil stop leak with every oil change in order for it to be effective. Important to follow instructions exactly as listed or you could experience engine issues. 

PROS

  • Easy to use
  • Versatile, works for a range of vehicles 
  • Prevents future leaks 
  • Affordable

CONS

  • Only slows down larger leaks
  • Need to use consistently for effectiveness 
  • Important to follow exact instructions

2. Lucas Oil Engine Oil Stop Leak additive

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Lucas Oil 10278 Engine Oil Stop Leak, 1 Quart

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Lucas Oil 10278 Engine Oil Stop Leak, 1 Quart

Specification

BrandLUCAS oil
Liquid Volume1 Quart
Item Dimensions LxWxH3.3 x 3.3 x 11.75 inches
Item Weight2.02 pounds

Features

  • Compatible with petroleum, semi-synthetic and full synthetic motor oils
  • Renews worn seals with no risk of damage or eventual corrosion
  • Reduces engine noise and oil consumption, while raising oil pressure
  • Contains no harmful solvents

Lucas Engine Oil Stop Leak is an all new formulation of Lucas additives and very specific base stocks designed to stop seal leaks in engines. Compatible with petroleum, semi-synthetic and full synthetic motor oils.

WHAT WE LIKE

Overall for smaller leaks this engine oil stop leak works well as intended. It renews worn seals without the risk of corrosion. It reduces engine noise and oil consumption which are added benefits. Its versatile compatibility is also a big plus. 

WHAT WE DONT LIKE

Use of this engine oil stop leak may result in excess smoke through the exhaust which is not ideal. The packaging is not great and leaks may occur as a result. Tends to work on smaller leaks but does not seem to hold up for larger leaks. 

PROS

  • Works well on small leaks
  • Renews worn seals
  • Reduces engine noise 
  • Versatile compatibility 

CONS

  • May cause additional smoking
  • Poor packaging 
  • Only handles small leaks

3. LM 1005 Oil Leak Stop 300 ml

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LM 1005 Oil Leak Stop 300 ml

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LM 1005 Oil Leak Stop 300 ml

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LM 1005 Oil Leak Stop 300 ml

Specification

BrandLiqui Moly
Liquid Volume300 ml
Item Dimensions LxWxH2.13 x 2.13 x 7.28 inches
Item Weight8.1 Ounces

Features

  • Regenerates engine seals 
  • Prevents oil stains
  • Counteracts oil dilution
  • Reduces engine noise
  • Reduces oil consumption

LM 1005 oil leak stop regenerates rubber and plastic engine seals such as shaft seals and valve stem seals and prevents oil stains under the vehicle. Counteracts oil dilution. Reduces engine noise and oil consumption through piston rings and valve guides.

WHAT WE LIKE

This engine oil stop leak gets the job done, it seems to work in stages but it is very effective at stopping leaks overall. It stops your vehicle smoking due to oil leaks due to sealing the leak well. They are clear that the product only works on rubber and plastic seals. This product also has the added benefit of reducing oil consumption. 

WHAT WE DONT LIKE

Only effectively stops the leak after driving 500 miles which can be frustrating as it is not quicker or may not seem like it is working initially. Works well for smaller leaks, large leaks will likely require a full repair as this will not help. It works for a certain period only after the miles rack up you are likely to experience a reemergence of the leak.

PROS

  • Stops leaks over time
  • Halts smoke from oil leaks 
  • Clear on what the product works on
  • Reduced oil consumption

CONS

  • Takes longer than average to seal leaks 
  • Only works on smaller leaks
  • Leaks can reoccur

4. ATP AT-205 Re-Seal Stops Leaks

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ATP AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle

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Specification

BrandATP
Liquid Volume8 Ounce
Item Dimensions LxWxH7 x 4.5 x 4 inches
Item Weight1.76 ounces

Features

  • Professional strength 
  • Fast acting resealer
  • Stops leaks fast
  • Rejuvenates all rubber seals & gaskets in engines, transmissions, power steering, differentials and hydraulic systems
  • Compatible with conventional and synthetic oils, ATF, gear oil, power steering fluids and hydraulic oil
  • Does not contain petroleum distillates, will not over-swell or breakdown seals
  • 8oz bottle will treat a 6 quart capacity, adjust accordingly

AT-205 Re-Seal is a fast, effective and safe stop-leak for all rubber seals and gaskets. The exclusive formulation restores worn or dried out seals and is not harmful to internal bearings and components.

WHAT WE LIKE

The fast action of this engine oil stop leak is great. For the average oil leak the solution does seal in record time. It does the job well, it seals leaks very effectively. It is compatible with other products used in the engine and for various vehicle types. A cost effective oil stop option, that works out much cheaper than fixing the leak at a mechanic 

WHAT WE DONT LIKE

For certain leaks this engine oil stop leak could have a very negative effect. It can cause rings or seals to swell to the point that it breaks completely and actually requires a full transmission rebuild, a very expensive potential risk. You need to run the engine when adding this product in or it can cause additional costly issues. 

PROS

  • Fast acting
  • Effective sealant 
  • Good compatibility
  • Cost effective solution

CONS

  • Does not work on all oil leaks
  • Can cause bigger mechanical issues
  • Have to follow exact instructions or bigger issues can occur

5. STP High Mileage Oil Treatment

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STP High Mileage Oil Treatment, Formula for Cars & Truck, Stop Leak, Bottles, 15 Fl Oz, 15604B

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STP High Mileage Oil Treatment, Formula for Cars & Truck, Stop Leak, Bottles, 15 Fl Oz, 15604B

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STP High Mileage Oil Treatment, Formula for Cars & Truck, Stop Leak, Bottles, 15 Fl Oz, 15604B

Specification

BrandSTP
Vehicle Service TypeCars and Trucks
Liquid Volume8 Ounce Bottle
Item Dimensions LxWxH7.22 x 3.65 x 1.85 inches
Item Weight15.7 ounces

Features

  • Rejuvenates seals and gaskets
  • Helps stop leaks, noise and smoking
  • Contains zinc anti-wear agent ZDDP
  • Excellent for all cars, light trucks and SUV’s
  • Use every oil change

This high-viscosity formula, complete with anti wear agent ZDDP, is specially formulated to help fight metal-to-metal friction by providing a thicker cushion between moving engine parts.

WHAT WE LIKE

This is a very affordable engine oil stop leak option and next to the cost of a leak repair it is a no brainer. Works well across a range of vehicle types and sizes adding to it’s versatility. The sealing ability works well and holds up in various weather and driving conditions. Assists in managing your oil consumption to a much better level. 

WHAT WE DONT LIKE

The anti-wear agent ZDDP can have a negative effect on older cars’ catalytic converters so use caution with older vehicles. Poor instructions are given on how to add the engine oil stop leak so you do not have confidence that the product is being used correctly. Cannot handle fixing all leaks and need to be more realistic in advertising regarding the product’s capabilities. 

PROS

  • Very affordable 
  • Use across a range of vehicles 
  • Works well across weather and driving conditions 
  • Better oil consumption

CONS

  • Does not work on all oil leaks
  • Can cause bigger mechanical issues
  • Have to follow exact instructions or bigger issues can occur

Conclusion

When you need a reliable engine oil stop leak then “Bar’s Leaks 1010 Engine Oil Stop Leak” is our best choice. The special formulation of this engine oil stop leak really helps to stop and seal motor oil leaks caused by regular wear and tear. 

This solution also helps to prevent future leaks by conditioning gaskets and seals. This is a fast and affordable solution to oil leaks that you will be grateful to find. It is easy to use and vestile in the vehicles that it can be used on. It is a great all round engine oil stop leak solution that ticks all the boxes. 

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