Issues with car after using Seafoam

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Alright, first things first, we aren’t here on a witchhunt for Sea Foam. We have heard of a lot of people using it and loving the outcome. Like most things in life, no matter what the majority of people say there will always be people that don’t experience the same outcome. From watching movies to their favorite drinks, someone might love one thing and someone might not. You can’t make everyone happy.

However, with cars it doesn’t really come to do with making them happy or not. It is just about issues that have come upafter using a specific treatment. So we will take a look at what Sea Foam is, what it does, and we look at some of the complaints online from people who used it.

Seafoam for Cars

Seafoam is a popular product used to clean and preserve engines in vehicles. It can be added to fuel, oil, or an engine’s intake manifold to help reduce carbon build-up and ( supposedly ) improve fuel efficiency. While using Seafoam on your car may seem like an easy way to boost its performance, there are some potential issues you should be aware of before adding it to your vehicle.

Specifically, when using Seafoam in cars with high mileage or older models with worn out parts, you can experience increased wear and tear on the engine components due to the harsh chemicals found in the product. Additionally, it can cause clogging if not used correctly, leading to poor performance or even damaging the engine altogether. It’s important that drivers understand these risks before attempting any maintenance involving Seafoam on their cars.

Symptoms of Bad Seafoam Use

In recent years, the popularity of using Seafoam as a way to clean and maintain car engines has grown significantly. While it is true that for many people, this product is an effective way to keep their car running smoothly, there have also been reports of issues with cars after using Seafoam. From minor problems such as engine stalling to more severe issues like engine failure, it is important to understand the potential risks associated with this product.

mixing up some blue chemicals
Does this look like where Sea Foam ? Probably not but it’s some blue chemicals !

The truth is that most people with cars that are running smoothly aren’t looking to use Seafoam, as they don’t need it. So that leaves the sample size of people who have pre existing issues prior to using Sea foam at high level. So they come in with issues, and Seafoam increases the issues, so we will take a look at the causes of the issues up next…

Causes of Issues After Using Seafoam

Many people turn to Seafoam for a quick and easy fix when it comes to car maintenance, but by the time they are turning to sea foam they are already having issues… which is never a good time to start trying something new.

One common issue that we have read online is that people just straight up don’t use it right. So this isn’t the products fault its the cause of Seafoam and improper application methods. So again, this isn’t the products issue, but rather an issue that people have because they use the product wrong. Using too much or applying it incorrectly can lead to clogged fuel lines or damage to rubber parts like hoses and seals. Additionally, if you don’t drive your vehicle long enough after adding Seafoam for it to properly clean out the system, then debris may remain in your engine and cause further problems down the line.

So if you want to use Sea Foam please read their FAQ and instructions on how to use it correctly.

Common Problems with Seafoam

Initial problem gets worse

The easiest way to break down the issues that people have after using Sea foam is that the initial problem they started with got worse. So if there was a small leak somewhere, the leak is bigger. But when you think about it, it’s because you cleaned out the area where the leak was. This allows a cleaner opening, which makes the leak bigger.

Check engine light is on

This is the most common complaint that we saw, and that is because it is kind of a catch all of issues. There are so many reasons that you can have your check engine light turn on. It literally means, check your engine… something isn’t right. This is something that you are going to need to either check out at a mechanic or see if you can get a code reader to find the cause of the issue. The good news is that you might also be able to get the check engine light off , simply drive around normally for 20-30 miles and reset the light if you can. Sometimes it is just because of the additive causing misfires or ratios being a bit off.

Might damage your O2 sensors

There is a slight possibility that Sea foam can affect your O2 sensors if they are on their way out already. This is because they will be monitoring the oxygen and when putting Sea foam in it will be something that the engine is not ready to see because it usually isn’t in the mix. So it could cause additional stress on an already failing sensor.

Detrimental Effects on Vehicle Performance

Using Seafoam can have negative consequences on your vehicle’s performance, such as reducing fuel efficiency or creating issues with the spark plug wiring. In addition to this, it can cause excessive wear on the cylinder walls due to its abrasive nature which will decrease overall engine life span. Furthermore, when used improperly or too frequently, it can actually cause an obstruction in certain parts of the engine system leading to poor combustion and reduced horsepower.

How to Avoid Issues with Seafoam

Using Seafoam to clean the fuel system of your car is a popular and effective way of removing dirt, sludge, and other deposits. However, if not used properly, it can have undesirable results that can cause damage to your engine. To avoid these issues with car after using Seafoam, it’s important to understand how the product works.

The best thing that we can say is that you really shouldn’t be needing Sea foam. It isn’t anything against the product itself rather the thought process behind it. If you know your engine needs to be looked after, then just do the maintenance that you are needed to keep it in good shape. Doing your oil changes and scheduled maintenance you shouldn’t need this type of product.

If you do need to do it, please read the instructions front to back and know exactly the best way to apply it. We don’t doubt that the product can help specific situations, but it isn’t a fix all. If your engine is on the way out, and this is a hail mary… then it might be a good time to try it as you don’t have much to lose. But you shouldn’t be surprised that after it cleans out the sludge or build up it pushes it through the system and causes failures.

We aren’t just dumping on this product by any means, but we did find this video from a channel we love that did point out some issues with it, so again, it is worth checking out if you are curious:

Seafoam and possible issues…


As we have gone over, there is a time to use Sea Foam and it seems to do a good job. There are a lot of people that have had a good outcome of using this product. There is a place and time for this product, but it isn’t when you just havne’t kept up the maitnence.

It is like working out, if you haven’t worked out for years and decide that today is the day… you wouldn’t go working out for 5 hours straight. If you stay on top of a schedule you won’t need to ever do anything drastic. In general, extremes are best to be avoided and your car engine is no different, just stay on top of it and hopefully you never need to look for a product to save your engine.