
Nail polish remover is a powerful solvent that contains acetone, a corrosive substance that can damage cars. Despite this, some people consider adding nail polish remover to their car gas tanks to boost octane levels and improve fuel mileage. However, experts advise against this practice, as acetone can negatively impact engine components, void warranties, and increase emissions. While acetone is a good cleaner, its use in cars is controversial, and it's important to carefully consider the potential risks before using it as a fuel additive.
| Characteristics | Values |
|---|---|
| Purpose | To increase fuel mileage |
| Effectiveness | No significant improvement in mileage |
| Impact on Vehicle | Corrosive, may damage rubber components |
| Additive | Acetone, a powerful solvent |
| Alternatives | MTBE, Methyl-tertiary-butyl-ether, Xylene, Toulene, Alcohol |
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What You'll Learn

Nail polish remover is not meant for cars
The base solvent in nail polish remover is usually acetone or ethyl acetate, both of which are powerful solvents that are very corrosive. Acetone will dissolve rubber components in a car's fuel system, such as gaskets and O-rings. It can also void your warranty and, if spilled on the car, remove the paint.
Some people claim that adding nail polish remover to gasoline increases the octane rating of the mixture. However, true high-octane fuels can foul plugs and O2 sensors due to their lead content. There are better alternatives to nail polish remover for increasing octane, such as Methyl-tertiary-butyl-ether (MTBE), which has since been recalled due to its long-term toxicity.
In conclusion, nail polish remover is not meant for cars. It can damage rubber components, void warranties, and remove paint. There are better alternatives for increasing octane ratings that are safer and more effective.
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Acetone is a powerful solvent
Acetone's chemical makeup includes elements that are both polar and nonpolar, allowing it to be used with both organic and inorganic substances. This versatility makes acetone a necessity in a multitude of industries, including pharmaceuticals, scientific testing, sterilizing medical tools, cosmetics, textiles, and gasoline. For example, acetone is used in the production of plastics, pharmaceuticals, adhesives, and coatings. In laboratories, it is used in organic synthesis, chromatography, and analytical chemistry.
One of the most common uses of acetone is as a solvent in gasoline. It is used to thin gasoline, allowing it to diffuse easily in the engine and improving fuel efficiency. However, there is debate over whether acetone actually improves fuel efficiency. Some people claim that it increases fuel mileage, while others, like NPR's Tom and Ray Magliozzi, insist that it "does absolutely nothing" to increase gas mileage. They warn that acetone will dissolve rubber components in the fuel system, like gaskets and O-rings, and could void your warranty.
Despite these warnings, some people continue to add acetone or nail polish remover, which often contains acetone, to their gas tanks in an attempt to improve fuel efficiency. However, this practice may not be safe and could damage the car's engine. It is important to carefully consider the risks and potential consequences before using acetone in a gas tank.
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Acetone may damage rubber components
Acetone is a powerful solvent that is commonly used as a paint thinner and nail polish remover. It is a highly corrosive substance, which is why automakers advise against using it. While acetone is in your fuel system, it will dissolve all of your rubber components, including gaskets and O-rings.
Acetone is a simple ketone that exists as a colourless and highly flammable liquid. It is highly reactive and is used as a solvent for many organic and some inorganic materials. This reactivity is due to the presence of the carbonyl group (C=O) in its core ketone functional group.
Rubber seals commonly used in automotive seals are generally resistant to acetone damage due to the use of a special type of rubber designed to withstand such chemical attacks. However, prolonged exposure to acetone will damage the rubber's integrity.
It is important to note that the extent of damage caused by acetone depends on the type of rubber and acetone involved. While some rubber components may be more resistant, others may be more susceptible to the corrosive nature of acetone.
In addition to the potential damage to rubber components, using acetone in a car's gas tank may void the warranty. It is always advisable to consult with automotive experts or manufacturers before experimenting with any additives in a vehicle's fuel system.
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It may not actually improve mileage
Acetone, the base solvent in nail polish remover, is a powerful solvent that can be used as a paint thinner and nail polish remover. It is also very corrosive, which is why automakers warn against using it. According to Car Talk Web site hosts Tom and Ray Magliozzi, acetone does nothing to increase gas mileage. They further add that while the acetone is in your fuel system, it will dissolve all of your rubber components, such as gaskets and O-rings.
There is also the question of the payback period. Because of the high price of acetone, it will take a lot longer to save enough in gasoline bills to pay for it. Additionally, the Environmental Protection Agency has evaluated or tested more than 100 products that promised to save gasoline and did not find a single one that significantly improved mileage.
Some people argue that acetone can help with MPG, but this is questionable. Firstly, many nail polish removers are no longer acetone-based and may contain water, dye, perfume, or other additives that could negate any potential benefits. Secondly, even if pure acetone is used, it is difficult to properly store and measure the correct amount for use in a vehicle. Improper use could lead to damage to the fuel system, as acetone can deteriorate plastics and rubber that it comes into contact with.
While some people claim that using nail polish remover in their gas tanks has increased their mileage, it is difficult to accurately judge fuel efficiency when driving around due to varying conditions such as weather, road surface, and traffic. The only way to truly know if something boosts mileage is to conduct controlled scientific tests.
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It may void your warranty
Using nail polish remover in a car gas tank may void your warranty. While some people claim that adding nail polish remover to a car's gas tank can increase fuel mileage, this has been debunked by experts such as NPR's Tom and Ray Magliozzi, who state that it "does absolutely nothing" to increase gas mileage. In fact, acetone, the main ingredient in nail polish remover, is a powerful solvent that can be corrosive to rubber components in the fuel system, such as gaskets and O-rings.
Additionally, the Environmental Protection Agency (EPA) has tested over 100 products that promised to save gasoline and did not find a single one that significantly improved mileage. On the contrary, some products were found to substantially increase exhaust emissions. Therefore, using nail polish remover in a car's gas tank may not only void the warranty but also potentially cause damage to the fuel system and increase emissions.
It is worth noting that some people argue that using a small amount of acetone diluted in a large volume of gasoline may not cause harm. However, there have been reports of issues with certain car models, such as the Toyota Prius, where the acetone ate away at the rubber or plastic components in the fuel system over time. As such, it is clear that using nail polish remover in a car's gas tank is not worth the risk of voiding the warranty and potentially causing damage to the vehicle.
Furthermore, while some older sources suggest that acetone can be used to clean car parts, it is important to note that automakers specifically warn against using it due to its corrosive nature. There are also alternative methods to clean car parts, such as using gasoline or acetone-free nail polish remover, which do not carry the same risks as using pure acetone. Therefore, it is always best to consult a professional mechanic or refer to the car manufacturer's recommendations for approved methods and products to ensure the warranty remains valid.
In conclusion, the potential risks of using nail polish remover in a car's gas tank far outweigh any unproven benefits. It is important to consider the possibility of voiding the warranty, as well as the potential damage that could be caused to the vehicle's fuel system and the increase in exhaust emissions. Therefore, it is strongly advised against adding nail polish remover to a car's gas tank to avoid any costly repairs and maintain the validity of the warranty.
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Frequently asked questions
Some people believe that nail polish remover, which often contains acetone, can increase fuel mileage and engine power.
No. While acetone is a powerful solvent and cleaner, it is very corrosive and can damage rubber components, gaskets, and O-rings in the fuel system. It may also void your warranty.
Yes, some people use rubbing alcohol or Methyl-tertiary-butyl-ether (MTBE) as fuel additives to improve engine performance. However, MTBE has been recalled in California due to long-term toxicity concerns.











































