How To Use Lucas Oil Stop Leak

Did you just buy Lucas Oil Stop Leak but are unsure how to use it? Don't worry! We've researched the answer for you.

Lucas Oil Stop Leak is a product that helps prevent your car engine from leaking oil.

Follow these steps to use it:

  1. Make sure to park in a safe spot, then turn the car off.
  2. Check the oil level in the tank. 
  3. Add the Lucas Oil Stop Leak into the tank in the correct ratio. There should be 1 quart of Lucas Oil to 4 quarts of oil. 
  4. Close the tank, then turn the car on.
  5. Drive the car to allow the solution to sit in the engine.

This article will teach us when and how to use a Lucas Oil Stop Leak. We'll provide more specific details about this product and its purpose. There's a lot to learn today. So, let's keep reading!

Lucas oil transmission fix stops slip and leaks bottle on the top of the engine bay, How To Use Lucas Oil Stop Leak

How to Use Lucas Oil Stop Leak

Lucas Oil Stop Leak is a kind of additive used to seal engine leakages. It also works to minimize noise and oil consumption as oil pressure increases. It doesn't contain a solvent and promotes longer engine oil life by about 50%.

You can consider adding Lucas Oil Stop Leak when the oil level drops by 20%. Then, drive the car to let the Lucas Oil mix with the engine oil. 

You can also watch a video here for a demonstration:

Why Is Engine Oil Leaking?

car oil change under chassis black used oil

You should know what triggers an engine to leak oil, as it may result in worse damage when ignored. Check below some possible reasons:

Excessive Oil

You should not overfill the oil tank. If you do, the oil will leak into other car components, causing severe damage. Consider draining the excess to stop any leakage due to overflow.

Broken Gasket

A gasket is a rubber material that holds the drain plug in place. If it's broken, the oil will eventually exit through the gaps around the drain plug. You'll want to replace the gasket to resolve this issue.

Oil Filter Misalignment

Misalignment happens when there's too much pressure while you drive. It can even be due to overtightening the drain cover or the filter. You can fix such misalignment by reinstalling or replacing the oil filter.

Lucas Oil Stop Leak Compatibility

broken car on roadside open hood

It's essential to know the compatibility of Lucas Oil Stop Leak with some kinds of motor oil, as it may cause damage to the engine due to incorrect usage. Refer to the list of compatible engine oils below.


Conventional motor oil is refined, meaning it undergoes a process of separating various molecules to achieve a concentration good for manufacturing. It contains petroleum as its base compound. However, the raw materials used in conventional motor oil can affect its quality.

See this conventional motor oil on Amazon.


On the other hand, semi-synthetic pertains to the mixture of conventional and synthetic motor oils. This will improve the resistance to oxidation and high temperatures. Most semi-synthetic motor oils are cheaper due to the combination with conventional oil.


Synthetic motor oil is not mixed with any other oil type. It is processed to reach a high-performance standard and consistency. This motor oil can minimize friction and heat, making it popular with many drivers.

See this synthetic motor oil on Amazon.

Other Purposes of Lucas Oil Stop Leak

Aside from stopping engine oil leaks, this product can also serve other purposes. Refer to the list below.

Noise Reduction

Lucas Oil will improve the engine's performance, and you'll notice it getting quieter. However, Lucas Oil cannot eliminate all the noise. There might be other components having their own issues that result in noise.

Increased Oil Pressure

Considering that Lucas Oil is an additive, it can also fill some loose spaces between the worn parts, resulting in increased oil pressure. It helps maximize the efficiency of the engine's transmission system.

Less Oil Consumption

Lucas Oil also acts as an additional oil on top of the existing motor oil. So, you'll get to cut the cost whenever you refill the oil tank.

How Much Is Lucas Oil Stop Leak?

The price varies per manufacturer and seller. Depending on the product inclusion and quantity, you can expect to spend from $50 to $130 or higher.

How to Manually Check Engine Oil Level

Some cars, especially old models, don't have a feature that shows the engine oil level. So, here are the steps for checking yours manually. Keep in mind that this method is not precise, but at least you'll get the estimated amount of remaining oil inside the tank.

Simply follow the steps below:

  1. Park your car in a level location, and turn off the engine. Always check the oil level after the engine has warmed up. 
  2. Find the engine oil tank and the engine dipstick.
  3. Pull out the dipstick, and wipe it clean. 
  4. Reinsert the dipstick, pushing it into its casing.
  5. Pull the dipstick back out.
  6. At the end of the dipstick are markers indicating the engine's amount of oil. Ideally, the oil line will meet the 'full' indicator line. Anything below this line indicates that oil may need to be added. If the oil line is at or near the 'empty' marker, you must refill your car with oil and should take your vehicle to a repair shop to see if there is an issue. 

Signs You Need to Change Engine Oil

check brake fluid hand open tank car

The oil in your car's engine must be changed for every 3,000 to 7,000 miles driving distance, depending on the manufacturer. However, you can also refer to these common signs below:

Oil Change Warning

Most modern cars have a warning light indicating the need to change the engine oil. It's best to pay attention to such a warning and read the user manual for your guide.

Too Dark Oil

When you check the oil levels in your car, and the oil is very dark colored, then it's a sign that it has absorbed a lot of dirt. Also, this can cause a foul, pungent smell that can harm the passengers when inhaled.


When was the last time you changed your engine oil? If you're driving too long without changing the oil, you should consider changing it now. Depending on the car manufacturer's recommendations, you should change your oil once every three months, or 3000 to 7000 miles. 

How to Change Engine Oil

refueling pouring oil quality into engine

Now that you're familiar with the signs when to change the engine oil, it's good to know the steps.
If you are not experienced in mechanical work, you should have a professional complete this process.
If you choose to change your oil yourself, see these steps below:
  1. Find the right engine oil and oil filter that suits your car. You can ask the manufacturer for recommendations.
  2. Place a plastic sheet on the ground under the car.
  3. Drive the car and stop on top of the plastic sheet. Turn off the engine.
  4. Open the hood and allow the engine to cool down for at least 20- 30 minutes so the oil will not be too hot.
  5. Wear gloves and goggles for your protection.
  6. Pull the car up with a jack for easier access to the drain plug.
  7. Prepare a bucket to catch the old engine oil.
  8. Locate the engine drain plug, then loosen it with a wrench.
  9. Allow the oil to drain completely.
  10. Detach the oil filter, then clean the drain plug to remove the oil residue.
  11. Install the new oil filter, then tighten the drain plug.
  12. Now, add the fresh oil. You can use a funnel to prevent leaking the oil into other components.
  13. Dispose of used motor oil appropriately. 

Other Products from Lucas Oil

There are various products from Lucas Oil, but remember that not all of them are designed to stop engine leakages. Familiarize yourself with the products below.


Lucas Oil has a lot of lubricants that suit your car model. Lubricants can improve driving performance by means of eliminating excess rust or dirt. You'll notice the wheels are easier to turn when you lubricate the axles, for instance.


Also, Lucas Oil offers hydraulic fluids or those products you can use to protect the hydraulic pumps and other components. Some of these products contain additives to enhance the quality of fuel or gas emissions.

Transmission Products

It's essential to keep the transmission in optional performance. These products help minimize squeaking noise, prevent blockages, and many that can benefit the car's components.

Racing Products

Aside from the products for modern cars, Lucas Oil also offers racing products such as engine oil and gasoline enhancers. However, you should read the user manual before you test these products on your non-racing car.


Lucas oil transmission fix stops slip and leaks bottle on the top of the engine bay

We learned a lot from this article. At first, we discussed the steps on how to use Lucas Oil Stop Leak. Then we talked about changing the engine oil and other products by Lucas Oil.

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