Is it okay to put lacquer thinner in gas tank? (2023)

Many car owners prefer to uselacquer thinner in fuel tankbecause of the immediate effects. But have you ever wondered whether it is good or harmful to apply it to the engine of a car? This blog will give you a satisfying answer to such confusion.

We'll cover both pros and cons to access the big picture. As a result, better knowledge leads you to better solutions to maintain good quality.

There are also techniques and viable alternatives to lacquer thinner in the blog. This allows you to expand the range of selections. Read on for detailed information!

An overview of lacquer thinner

Is it okay to put lacquer thinner in gas tank? (1)

What is Lacquer Thinner?

People also call it cellulose thinner. It combines several solvents that can dissolve some types of resins and plastics.

The formulation of such a modern thinner follows the prescriptions oflow-VOC. For this reason, it has a strong and noxious odor. You must wear a special mask to protect your health when using it.

The flammable ingredients are another thing to consider. So you need to comply with safety standards to avoid unfortunate accidents.

Use of lacquer thinner

It is an excellent 'candidate' for cleaning and removing stains from surfaces. However, you can't just apply it in every material. The lack of essential knowledge can lead to deplorable damage!

In this section, we will show you the common applications and some notes. Scroll down for details on lacquer thinner best practices.

  • As removal of rust and paint drops

The addition of kerosene makes lacquer thinner ideal for removing paint stains or rust. It can help to restore the shine of the surfaces!

However, its strong effect can turn its benefits into unexpected destruction if you leave it on the surface for a long time.

Therefore, you must observe the results and remove the varnish before it affects the top coat!

(Video) Lacquer Thinner In Gas Tank Experiment Video

There is the fact that you can usepaint thinner for cars.It speeds up the process of removing stains on a car.

Still, thecar paintwill never be the same after applying the cellulose thinner as the solvents can dissolve the original paint. So you have to be fast and accurate.

  • As a degreaser

It makes sense if tar or grease sticks to a car or motorcycle. The appearance becomes less attractive due to the dirty paint.

The solvents can help you degrease these stains. However, be careful with the harmful fumes and severe side effects.

You can check out some alternatives that share the same features and pose less dangers to our health. This topic will be the finishing touch of this blog!

  • As a paint thinner catalyst cleaner

A catalytic converter plays an important role in a car's exhaust system. The good condition can maintain smooth operation. Plus, it saves the cost of frequent depreciations or replacements!

Don't worry about ithow to clean a catalytic converter with lacquer thinner.It's a simple process that anyone can apply for!

Pour the correct amount of clean solvent into the half-full tank. Then activate your engine code at 2500 RPMs within 30 minutes to complete the cleaning process.

Is it okay to put lacquer thinner in gas tank?

Is it okay to put lacquer thinner in gas tank? (2)

The question can be confusing because we mentioned itput lacquer thinner in the fuel tank to clean the catalytic converter.People tend to use it because of its immediate effects.

Things can go well if we stick to the right amount and standard process. But is this thinner recommended? We are afraid to say no!

It cannot have devastating consequences in the short term. Yet you can recognize the unpleasant colors and odors of emissions.

(Video) PO420 Myth Busted?? PART -1 Lacquer Thinner in your Gas tank? Will It work??

Gradually, the decreasing power of the engine will become more apparent due to the serious effects on engine parts!

Keep reading the blog. The following content covers why and how the solvent has a major impact on a car's performance and maintenance!

Why can't we use lacquer thinner to clean the gas tank?

It might not be a bad idea if you know the right ways to apply it.

Still, this section dissects the damage ofuse lacquer thinner to clean the catalytic converter.The starting point is to look into the mix of fabrics.

Is it okay to put lacquer thinner in gas tank? (3)

Then you can understand the causes and drastic consequences for our fuel system cleaner.

The chemicals in lacquer thinner

The mixture can remove the dirt on paint and even the paint film. You can now find the explanation for its turbo power of corrosion through its ingredients!

There is a wide variety of materials, such as methyl ethyl ketone, acetone, toluene, xylene, etc. The proportions vary according to different manufacturers' criteria.

Meanwhile, rubber and plastic contribute most to make up an automotive fuel system. These ingredients are sensitive to the acetone compounds of thinner!

The ingredients are also flammable. When an engine is running, the heat inside increases. It creates the ideal environment for the paint to burn exhaust valves and even the core of the converter.

Hopefully the information above simplifies why thepure lakverdunneron a car's fuel system is not a good idea.

The effects

  • Immediate response

Many car users still prefer itclean the catalytic converter with lacquer thinnerdue to its immediate deletion. A small part of the blend does not cause major problems.

(Video) P0420 Scotty Kilmer Challenge Pouring Gallon Lacquer Thinner in Fuel Tank clean catalytic converter

Nevertheless, the car produces more smoke in the exhausts and more noise from activating engines. We should take such smoky exhaust fumes as early warnings!

It is acceptable to use it as a one-time or last resort. Indeed, overuse can destroy a car from the inside!

  • Long-term damage

It will lead to many problems ifpaint thinner nice catalysts.The knowledge about the corrosive materials can inform us in advance.

The composition in the fuel system cleaner suffers from destruction by the toxic compounds.

If the situation continues for a long time, the unpleasant smells and colors of emissions are not the only consequences. The whole engine will also deteriorate.

The original purpose is to refresh or renew the fuel system. The misuse of resources causes the opposite effects of our expectations. A car becomes slower and weaker with its slow engine.

Even a small residue or the repetition of using the solvent to clean the emission device leads to many problems. Immediate effects can cost you more in the long run.

For this reason, it is time to look for optimal solutions to remove such a toxic chemical from the fuel tank of a car. Scroll down for more interesting and useful information!

How to remove lacquer thinner from gas tank

Is it okay to put lacquer thinner in gas tank? (4)

We are now fully aware of the unexpected outcomes. Yet this mixture is still winning big bucks among drivers and mechanics thanks to its instant effects edge.

Using such an unpleasant chemical requires knowledge of how to remove it! Contrary to the easy use, the eradication process can be extremely sophisticated.

That's why we still don't recommend this solvent, although it's fine to use the right amount. It may cost you money, time and effort to remove it.

(Video) PO420 Myth Busted?? PART -2 Lacquer Thinner DID IT WORK?? A real test!

The following content will guide you through recommended actions to prevent even the smallest fuel system problem and catastrophic damage.

The steps include:

  • Turn off the engine and empty the gas tank of a car.
  • Observing the status or conditions for optimal actions.
  • If it gets worse, the fuel filter and fuel pressure regulator may need to be replaced.
  • Replace all the old fuel with the new one.

The easy-to-do guidance above is essential for DIY enthusiasts. However, if you want the guarantee of performance and safety, the support of a reliable technician is ideal.

The recommended alternatives

In this section we show you some practical alternatives. Consequently, we can save ourselves from dependence on the immediate but unpleasant blend!

There are two approaches to thoroughly cleaning the vehicle's fuel pump and exhaust system.

Without Corrosive Substances

This method requires the experience of disassembling and assembling the car parts. If you are familiar with the steps, this is our top recommendation.

The requirements are the basic tools and skills. After removing a catalytic converter from the car, soak it in the bucket with soap and water.

It usually takes you a night to get rid of all the dirt in a car converter. Then you need to mount it back on the vehicle!

With a specialized converter cleaner

This method will save you time and effort. You can do that instead of lacquer thinneruse cataclean, paint thinner, turpentine, etc.

The instructions for use may differ per brand and ingredient. Still, the general steps can be the same as below.

  • Lower the tank of gas to about ¼ full.
  • Pour in the cleaner liquid.
  • Drive the vehicle at normal speed within 15 minutes or activate the engine for half an hour.
  • Fill the tank with fuel or gasoline and drive your car as usual.

The chemical reaction between the cleaner substance and the fuels can remove the grime from your car's inverter. It is a simple description of how it works.


This blog gives an unequivocal conclusion about whether you should movelacquer thinner in fuel tank.There may be different types of engines, but the effects of such toxic chemicals are universal.

(Video) Will lacquer thinner clean a catalytic converter? We test Scotty Kilmer's hack.

Thanks to a better understanding of how much a vehicle's fuel tank pressure sensor suffers from such a corrosive material, we feel it is crucial to find the best alternatives.

We want to support you with useful knowledge about automotive solvents so that you can minimize the risks of engine wear and breakdowns.

Hopefully with a simple explanation and practical suggestions you will find the best solution!


Is it okay to put lacquer thinner in gas tank? ›

Absolutely not. Lacquer thinner formulas vary from brand to brand and may contain substances such as acetone which are harmful to your fuel system, especially rubber and plastic parts. Unless you can positively verify the chemicals in the lacquer thinner you're using, I wouldn't put it in the fuel system.

Can lacquer thinner be put in gas tank? ›

Similarly, being a flammable liquid, lacquer thinner is a severe fire hazard in your gas tank. The rising temperatures from your running engine may ignite the solution and burn your exhaust valves. Therefore, putting lacquer thinner in your gas tank results in a smoky exhaust and a slow engine.

Can you put lacquer thinner in your gas tank to clean your catalytic converter? ›

To clean your catalytic converter, start by adding pure lacquer thinner to a half-full gas tank. Next, set out for a day trip. You'll want to drive about 150 miles at high speeds. If you prefer, you can run the engine at about 2500 RPMs for about 30 minutes to allow the cleaner to run through the converter.

Is lacquer thinner safe for car? ›

Lacquer thinner can damage plastic and rubber and it can even strip car paint. Lacquer thinner acts quickly and aggressively to dissolve lacquers.


1. How to Clean Your Car's Catalytic Converter using Lacquer Thinner
(Scotty Kilmer)
2. Car Fuel System Lacquer Thinner 30 Day Test Video
(The Stanley Way)
3. Does Lacquer Thinner Clean Catalytic Converters? -EricTheCarGuy
4. Does Lacquer Thinner cleans carbon on pistons/intake valve cleaning/decarbonize engine with water
5. Results for laquer thinner in gas tank
6. **EASY** Lacquer Thinner FIX P0420 Code Video
(The Stanley Way)


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