Informational Guide

Can Oil Stop Leak Damage My Engine?

If your car is leaking oil, you want to do everything you can to prevent engine damage, which could lead you to look at some products on the shelf. Can Oil Stop Leak damage my engine, you might be asking? In this guide, we evaluate if Oil Stop Leak is bad for the engine and what you should do to prevent problems. 

The most known Oil Stop Leak product is made by Lucas Oil. It’s designed to seal up any leaks and stop the fluid from dripping if there is general wear. As the engine gets old, parts naturally degrade. To fix many of the seals and leaks, you will need to have engine repair performed, which can be costly. Some people choose to use the Oil Stop Leak products to either fix the issue or buy more time before the repair is needed.  

Is Engine Oil Stop Leak bad for your car? The older formulations aren’t the best option for your car engine. However, newer technology and modern additives make it easier to learn how to stop a bad oil leak. Overall, the majority of high-quality products today would be safe in most situations. With that said, they don’t always stop the leaks.  

The biggest concern is to make sure you use the right Oil Stop Leak. If you choose the wrong product, you can cause more damage, leading to a more costly repair bill.  

Can Oil Stop Leak Damage My Engine

What Kind Of Damage Can Oil Stop Leak Do To A Car Engine? 

Is Oil Stop Leak bad for the engine? The main concern is diluting the engine oil, causing it to have an improper amount of viscosity or the wrong level. If the oil becomes diluted, it can cause serious engine damage that can’t be repaired without a major rebuild.  

However, Lucas Oil Stop Leak doesn’t do this, which is why you want to invest in a good quality. Still, many of the top brands aren’t compatible with diesel engines, so you must analyze the directions carefully.  

Pros & Cons Of Oil Stop Leak 

Is Engine Oil Stop Leak good or bad? It depends on how you look at it. If the engine has a worn out seal, the Stop Leak product may be able to rejuvenate it and save you from a major repair. It’s a cheap alternative to fixing it and can also prolong the life of the car engine a little longer. 

However, if you purchase the wrong product, you have to ask - is Oil Stop Leak bad for your engine? If the product dilutes the oil, it can cause bigger problems. Plus, there’s always the chance that it won’t work at all, but that wouldn’t put you any further back than you already are. It would simply mean that you paid a little more than you needed to.  

How To Use Oil Stop Leak? (Detailed Guide For Engine Safety) 

Is oil stop leak bad for your engine? Not if it is used properly. Here are some steps to get you started. 

  1. 1
    Read all of the directions on the product. Each one will have different instructions. 
  2. 2
    For Lucas Oil Stop Leak, you will pour 20% capacity of the additive into the engine oil. So, if your motor holds four quarts of oil, you need to pour in one quart of the additive. 
  3. 3
    Check fluid levels to ensure it is in the good range. 
  4. 4
    Drive your vehicle and see if the leaks have stopped.  

If not, you want to have the vehicle looked at right away.  

How To Use Oil Stop Lea

Frequently Asked Oil Stop Leak Engine Damage Questions 

How much is an oil stop leak? 

Expect to spend between $10 and $30 for a treatment of Engine Oil Stop Leak. There are several different brands to choose from, so don’t just pick based on price, but look at customer reviews too.  

Can you use stop leak more than once? 

No, it isn’t wise to keep using the additive as it could cause damage. If you aren’t able to get the leak stopped after one application, it’s time to have the engine looked at.  

Where do you pour Oil Stop Leak? 

There are many engine parts, so you must be sure you put the formula in the right place. With most products, you dump it right into the oil through the fill port. Read the instructions of the product you purchased to see if there’s anything else you need to know.  

Can you put stop leak in a transmission? 

There are additives to put in the transmission fluid that might stop a leak. However, you need to pick one that’s meant for transmissions. The Engine Oil Stop Leak should never be added to a transmission.  


Can Oil Stop Leak damage the engine? There’s always the possibility, especially if you choose a no-name product. However, we have looked at the Oil Stop Leak, both good or bad, and found that there could be a lot of positives to using it.