
HEET is a line of winter automotive chemicals that are used to prevent gas line freeze-up hassles. HEET Gas-Line Antifreeze, which comes in a yellow bottle, has been sold for more than 50 years and contains methanol. ISO-HEET, which comes in a red bottle, can be used in any type of internal combustion engine and contains isopropanol. Both products prevent gas line freeze-up hassles but remove water in different ways.
| Characteristics | Values |
|---|---|
| Bottle colour | HEET Gas-Line Antifreeze: Yellow |
| ISO-HEET: Red | |
| Additive | HEET: Methanol |
| ISO-HEET: Isopropanol | |
| Use | HEET: 4-cycle gasoline engines |
| ISO-HEET: Any type of internal combustion engine (2 cycle, 4 cycle and diesel) |
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What You'll Learn
- HEET Gas-Line Antifreeze is the original HEET product and comes in a yellow bottle
- ISO-HEET comes in a red bottle and can be used in any type of internal combustion engine
- HEET contains methanol, which prevents gas line freeze-up
- HEET is a fuel additive that removes water from your fuel system
- HEET is a line of winter automotive chemicals

HEET Gas-Line Antifreeze is the original HEET product and comes in a yellow bottle
HEET is a line of winter automotive chemicals and is sometimes used as a generic term for any fuel additive that removes water from your fuel system. These chemicals are called 'fuel line dryers'. Water in your fuel can cause a lot of different problems, but the most common is frozen fuel lines. When the weather is below freezing and there is water in your fuel system, the water can freeze and block your fuel lines, preventing your car or truck from starting.
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ISO-HEET comes in a red bottle and can be used in any type of internal combustion engine
HEET is a brand of winter automotive chemicals that are used to remove water from fuel systems. The original HEET product, HEET Gas-Line Antifreeze, comes in a yellow bottle and has been sold for over 50 years. HEET products prevent gas line freeze-up hassles and remove water in different ways.
ISO-HEET, which comes in a red bottle, is another HEET product that contains isopropanol. It can be used in any type of internal combustion engine, including 2-cycle, 4-cycle, and diesel engines. ISO-HEET serves as a water remover and can be used all year round, not just in winter.
HEET products are fuel additives that, when added to the gas tank, sink to the bottom and mix with any water. Since HEET, water, and gasoline are heavier than water, they go to the bottom of the gas tank. When the vehicle is started, the additives, methanol, water, and gasoline are consumed during combustion inside the engine.
It is important to note that HEET products should only be used in 4-cycle gasoline engines, while ISO-HEET can be used in a wider range of engines.
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HEET contains methanol, which prevents gas line freeze-up
HEET is a brand of winter automotive chemicals, which includes fuel additives that remove water from your fuel system. This is important because water in your fuel can cause a lot of problems, including frozen fuel lines, which can prevent your car from starting. HEET Gas-Line Antifreeze, which comes in a yellow bottle, contains methanol, which prevents gas line freeze-up. The methanol sinks to the bottom of the gas tank and mixes with any water, as both are heavier than gasoline. When the vehicle is started, the additives, methanol, water, and gasoline are consumed during combustion inside the engine.
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HEET is a fuel additive that removes water from your fuel system
ISO-HEET, which comes in a red bottle, is a similar product that can be used in any type of internal combustion engine (2 cycle, 4 cycle and diesel). It contains isopropanol and, like HEET, prevents gas line freeze-up hassles but removes water in a different way.
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HEET is a line of winter automotive chemicals
ISO-HEET, which comes in a red bottle, is a similar product that can be used in any type of internal combustion engine. It contains isopropanol and also serves as a water remover in the spring and summer.
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Frequently asked questions
Gas lines are used to transport flammable gases to appliances that use fire, such as ovens, water heaters and fireplaces.
Fuel lines are made from materials such as steel, aluminium, rubber or elastomeric materials. They can also be braided or PTFE-lined.
Braided fuel lines are typically more flexible than metal lines, but are not as flexible as rubber lines. Metal fuel lines are generally more durable than rubber or braided fuel lines as they are resistant to wear and tear and are not prone to cracking or deterioration.
Yes, gas lines are incredibly dangerous and should not be tampered with by anyone who is not a professional.








































