Are you currently experiencing engine escapes from your trusty car or truck? The best way to protect your motor and prolong your car or truck’s lifespan would be to put money into a distinctive sort of oil additive.

The best petroleum additives to prevent leaks are simple to use and proceed to work immediately.

Best Engine Oil Stop Leak is generally brought on by worn and old O-rings and seals. But they may be expensive and hard to replace. Adding particular additives can help reduce the total amount of oil that escapes beyond worn seals.

With so many products to choose from, finding the ideal one can be complicated. However, there’s nothing to be concerned about since this detailed guide will point you in the ideal direction…

Reviews Top 6 Best Engine Oil Stop Leak

Reviews Top 6 Best Engine Oil Stop Leak

Bestseller No. 1
Lucas Oil 10278 Engine Oil Stop Leak, 1 Quart
Compatible with petroleum, semi-synthetic and full synthetic motor oils; Renews worn seals with no risk of damage or eventual corrosion
Bestseller No. 2
Bar's Leaks - 1000 Engine Repair - 16.9 oz
Increases oil pressure; Reduces friction; Helps clean internal parts; Quiets noise; Reduces oil consumption
Bestseller No. 4
Lucas Oil 10279 Engine Oil Stop Leak - 1 Gallon
Compatible with petroleum, semi-synthetic and full synthetic motor oils; Renews worn seals with no risk of damage or eventual corrosion
Bestseller No. 5
Lucas Oil 10279-4PK Engine Oil Stop Leak - 1 Gallon, (Case of 4)
Compatible with petroleum, semi-synthetic and full synthetic motor oils; Package Dimensions: 31.496 H x 32.257 L x 33.02 W (centimetres)
Bestseller No. 6
Lucas Oil Products LUC10278 Engine Oil Stop Leak, 1 Quart, 1 Pack
Product Type: Auto Oil; Package Dimensions: 8.89 L X 10.16 W X 30.48 H (Centimeters); Package Weight: 0.953 Kilograms
Bestseller No. 7
BlueDevil Oil Stop Leak
Permanently seal seeping or dripping oil leaks; Made in United States; Package Dimensions : 3.25 L x 6.0 H x 1.0 W (inches)
SaleBestseller No. 8
Bar's Leaks Concentrated Rear Main Seal Repair - 16.9 oz
Seals timing cover, cam seal, rear main and other hard to stop oil leaks; Add to engine oil
Bestseller No. 9
Bar's Leaks-1010 Engine Oil Stop Leak Concentrate - 11 oz Pack of 1, Grey
Stops and seals motor oil leaks; Works with all types of motor oil; Restores gaskets; seals to stop and prevent engine oil leaks
Bestseller No. 10
STP High Mileage Oil Treatment, Formula for Cars & Truck, Stop Leak, Bottles, 15 Fl Oz, 15604B
Rejuvenates seals and gaskets; Helps stop leaks, noise and smoking; Contains zinc anti-wear agent ZDDP

Lucas Oil 10278 Engine Oil Stop Leak

Lucas Oil is known for producing reliable products. If you’re searching for an oil stop flow that operates without breaking a lot, they have the best answer. The 10278 Oil Stop Leak is great for preventing escapes and fostering your operation.

This product doesn’t have any harmful solvent or some other corrosive properties. That usually means using this product will not have any long-term effects on your motor.

It is the only additive that improves your engine’s functionality. The prosperous resealing of your fuel system will decrease engine noise and petroleum consumption.

When some additives may whiten your petroleum, Lucas manages to improve oil pressure, and that’s how you will realize your performance increase. Comparable to additionally prevent escapes, Lucas uses substances to recondition deteriorated seals.

It’s compatible with all sorts of engine oils, such as complete synthetic oils. Lucas is a fiscally wise alternative that consistently gets good engine stop leak additive reviews.

Much like all the products on our listing, Lucas Oil Stop Leak Additive is not likely to have the ability to repair each matter. Some pockets are too large for your revitalized gaskets to seal properly.

Based on the sort of seal difficulty you’ve got, enlarging the gaskets might have an adverse impact. Additionally, Lucas is not compatible with diesel motors.

ATP Engine Oil Stop Leak

When you observe that you have obtained a significant engine oil flow, you probably wish to solve it immediately. ATP engine stop flow additives are a number of the fastest-working products out there.

Along with functioning exceptionally quickly, ATP can also be a very versatile product since you can use it in most of your vehicle’s major systems. It will also help fix flows in power steering, transmission, front and rear differentials, and hydraulic systems.

Many engine therapy additives include solvents, which could be detrimental to motor components. You won’t discover some of these dangerous Compounds in ATP products.

Those who have both gasoline and diesel-powered vehicles will appreciate the simple fact that the ATP products will operate with both gasoline and diesel motors.

Why is ATP this effective product known as plasticizers? All these plasticizers will rejuvenate cracked and worn rubber bits such as gaskets and seals–that the essential problem areas in regards to oil flows.

But, ATP stop flow can dilute your petroleum, lower your performance, and possibly cause a few blue exhausts. However, if you’re trying to find a remedy with some seriously rapid benefits, ATP Engine Oil Stop Leak maybe your best option.


  • Produces very quickly contributes to multiple vehicle systems.
  • Contains no harmful additives
  • Works with diesel motors
  • Could be used with almost all oil types


  • Some customers may experience excessive exhaust smoking afterward.

Bar’s Leaks 1040 Grey Rear Main Seal Repair Concentrate

Needing to replace a seal may be a real hassle and an unnecessary cost. The bar has made a product that promises to protect against this for as long as you can.

Besides, it works on the camera seal, timing cover, and other pieces to seal the rear principal seal.

Just put in a little of this product to the motor oil, and it’ll go to work straight away. This will aid engine parts from wearing out so fast and help extend the motor’s life span all around.

However, it ought to be said that this isn’t a permanent alternative. Individuals who have an older engine could be better off replacing the seals. After this is completed, adding a bit of the product to the petroleum can enable the seals to survive longer.


  • Gets to operate very fast.
  • Very simple to use.
  • Helps to seal hard to replace seals.
  • Rejuvenates dry seals.


  • Not perfect for elderly engines.
  • Doesn’t operate eternally.

Liqui Moly Oil Leak Stop

Liqui Moly supplies a flexible anti-leak product which may be employed on all diesel and gas engines. The liquid functions by cleansing and regenerating plastic and rubber seals, and consequently prevents oil stains from forming beneath the automobile.

The sealing activity will last for approximately 370 to 500 kilometers, which provides you sufficient time to drive into a service station and get the leak repaired.

The fluid improves engine stability at high engine speeds and its viscosity at elevated temperatures. Additionally, it improves engine operation by avoiding excessive wear transmissions, pumps, and compressors.

The product is suggested for all manual and additional transmissions.

Regrettably, the product is not compatible with motorcycles with wet clutches. It is also not acceptable for vehicles with automatic transmissions, restricting its usage to old vehicles and heavy-haul tractors using auxiliary transmissions.

Blue Devil Oil Stop Leak

Blue Devil is a well-known manufacturer in the automobile community. They have a vast selection of vehicle additives, plus they have a reputation for supplying quality products. Their oil stop flow is not any different.

Part of this reason Blue Devil Oil Stop Leak includes a location near the best additives on the plate is that it uses the best ingredients within its own prevent leak formulation.

Some other engine stop flow products include chemicals called oil distillates.

You won’t find these distillates from the Blue Devil product, which is great because while these oil distillates can revive rubber gaskets, they are also able to result in damage to your automobile’s other systems.

Those problems can be expensive to fix with your initial oil leak in the long term. Those top ingredients also produce Blue Devil products environmentally friendly and quite safe to use.

Ultimately, many consumers prefer this specific stop flow product since it will operate in both petrol and diesel motors. But if you are using synthetic oil in your motor, Blue Devil may not be the best alternative.


  • Very secure for people and the environment
  • Long-lasting Outcomes
  • Works well with both gas and diesel engines


  • Does not seal leaking head gaskets efficiently
  • Not compatible with artificial oils

NO LEAK 20401 Engine Oil Stop Leak

If you’re going through leaks, you will want a product that will repair the problem well. NO LEAK 20401 engine oil stop flow is generally the go-to product of professionals. This usually means it may be utilized with confidence.

This product has existed for several years and is constantly being improved to supply the best outcomes. It’s been designed to safely and easily extend rubber seals, so they stop leaking once again.

This exceptional formula is totally compatible and safe to use with engines.

Improves performance…

However, this product does not simply stop escapes. In reality, it’s also capable of improving the functioning of the engine. It’s simple to use and functions quickly.

Individuals who experience moderate or mild leaking are very likely to discover this product is a fantastic alternative.

But when the leaking is extremely heavy, it might be a sign of a more severe problem. In cases like this, the motor might well require an entire overhaul.


  • Compatible with engines and motor oils.
  • Helps stop the motor from smoking.
  • Reconditions hardened seals.
  • Used by professionals.


  • Not acceptable for use on leaky head gaskets.
  • May not operate if the flows are excessively heavy.

4 Important Things To Consider When Shopping For An Engine Oil Stop Leak Additive


The first step you must take when comparing different engine stop flow products would be to ascertain which engine type you’ve got on your vehicle: petrol or petrol.

We have already found that not all of the stop-flow additives will operate in diesel engines. Diesel engines take a lot thicker engine optimization, so be certain that you’re taking a look at an additive compatible with all the thicker viscosity.

Many newer vehicles need owners to run synthetic oil from the motors. Artificial is also a favorite selection for elderly, higher-mileage vehicles since synthetic oil may prolong worn components’ lifespan.

Nevertheless, not all motor oil stop flow additives are harmonious with synthetic petroleum, so be certain that you pick an appropriate product.

Activation Speed

A leaking engine could be stressful, and you are probably looking to have the problem resolved as quickly as possible. But lots of additives need an “activation interval” before you see a complete benefit.

Thus, don’t be shocked if you still observe some leaking throughout the first 100 miles or so after incorporating a stop flow product for your motor oil.


In the end, you are probably shopping for a motor oil stop flow, so it is possible to avoid costly repairs. A jar of stop flow is absolutely an inexpensive solution.

Still, it is important to consider exactly how much of this product you’re going to want, and how many times you will want to add it into your vehicle’s systems.

If possible, start looking for an additive that works following a one-time stimulation, even if it is not the least expensive bottle on the shelf.

In the end, in the long term, it is more cost-effective to pay more to get an additive upfront than to obtain a new bottle every few months with no end in sight.


When looking at a motor oil stop leak, it is important to consider the amount of protection that the product provides.

First of all, you are interested in having an additive that is likely to repair the flow, and you’re going to need that flow to be repaired as fast and efficiently as you can.

Start looking for an additive that only requires one application to repair the problem since they are inclined to be a stronger formula.

Additionally, it is important to consider the further protection that a stop leak additive may provide.

As an instance, an additive may effectively stop a motor oil flow. Still, they may also decrease engine noise or gain other vehicle systems such as power steering, transmission, or hydraulics.

A fantastic stop flow additive will provide lots of “bang for your buck.”

Advantages of Oil Stop Leak

Protect seals. Hardened or dried seals trigger most engine oil flows. It means that oil stop flow adds additives work is by massaging the rear principal seal and head gaskets, so they return to their initial dimensions and versatility.

This reduces the amount of oil that may float through.

Conserve petroleum. Oil leaks will cost you more money, damage the environment, and may possibly damage your car or truck.

If you are losing a lot of this fluid, then replacing it frequently will accumulate quickly, and you might observe a decrease in motor performance.

Save cash. Bringing your car to a garage to repair an oil leak may be a pricey trip. Between time and labor expenses, you may be spending countless simply to diagnose the problem.

For a fraction of the cost, oil stop oils may supply you with the exact same reassurance.


When using a halt engine oil leak doesn’t fix your problem, and you need to observe a mechanic for identification. Losing oil can lead to severe harm, and you are going to want to cover the problem whenever possible.

Make certain to read all of the product information to comprehend the proper quantities necessary to mix stop flow additive and your oil.

Before purchasing any additive to prevent an oil leak, learn which sort of oil you’re using. Not every product can be utilized with all the various kinds of oils, so it is vital to know your particular requirements.

Some oil additives consist of harmful chemicals. These additives may perform long-lasting damage to a motor. Steer clear of any petroleum stop oils that use oil distillates and watch out for certified products by the EPA.



A: Thankfully, the oil flow stops fluid and is remarkably user-friendly. All you need to do is combine it with all the proper oil for your car or truck.

An essential component is measuring the proportion of additives to petroleum, which may be located from the instructions to your stop flow solution.


A: Some older oil stop flow formulations were bad for your motor. But as time passes, businesses improve upon their formulations, and many products available now should not have some negative results.

You could damage your eng engine, you utilize an incompatible additive, even however, so be sure that you read on the products.


A: While oil stop flow additives are superb, they can’t fix everything. Should you use it and see no improvement, you will need to receive your vehicle properly diagnosed so you may fix whatever the root cause could be.


A: The solution to this depends on what exactly the reason for your oil flow is. The fixed oil flow additives revitalize gaskets and seals to close any gaps that might be present.

In case you’ve got a serious hole or a flaw somewhere else, then utilizing a stop flow won’t be a permanent alternative.

See more: Best Oil Stop Leak Additives

Last Ideas

So, which is our best engine oil stop leak product? In cases like this, it’s a simple answer. Hands down, our best pick is Lucas Oil stop flow. Moreover, we reviewed the best radiator stop leak here!

It is the most trusted brand on the market regarding quitting motor oil flows, and it cannot just prevent your motor from leaking, but it could even boost your car’s performance.

Lucas Oil products contain no harmful chemicals and will not corrode other engine components. Additionally, even the biggest bottles of Lucas Oil additives are extremely inexpensive. For us, that mix is really hard to beat.