Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. What Is Dry Gas?

What Is Dry Gas?

dry gas 1

Dry gas is a very helpful fuel additive that is used to remove water from gasoline and prevent water-contaminated gasoline from freezing. While the solution itself is actually called dry gas, there is one brand of this fluid named Drygas.

Water should never be in the gas tank, fuel lines, fuel injectors, or combustion chamber. There are a number of issues water-contaminated gasoline can bring about:

  • Water does not combust when mixed with air inside of the combustion chamber. This means that if the gasoline going into an engine has too much water in it, the fuel will not burn very well. In some cases this can stall the engine with the watery gas still in the combustion chamber, corroding metal surfaces and generally making a mess of things.

  • Water also has a nasty tendency to freeze when it reaches a temperature below 32 degrees Fahrenheit.

  • Water causes rust and corrosion in the gas tank, metal fittings, and metal lines along the fuel system. This is particularly bad for the fuel system, as some of the debris can make it all the way to the fuel injectors and eventually clog them.

How does dry gas work?

Based on either methanol or isopropyl alcohol, dry gas rids the fuel system of water by binding to the water and then burning it all off in the combustion chamber. Because of alcohol’s extremely low freezing point, it also acts as antifreeze to water-contaminated gasoline.

Different engines have different responses to dry gas and some will run differently with it in the fuel. Dry gas is not really a necessary part of routine maintenance, but if there is any reason to suspect that a vehicle is suffering from water-contaminated gas, especially in the winter, dry gas is an excellent solution.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...


Related questions

Q: Fuel pump won't energize

Hi and thanks for contacting YourMechanic. Either you have the wrong fuel pump for the vehicle or the circuits to the fuel pump are shorted together and causing an issue with the fuel indicator an pump. The pump should have...

Q: I put rusty fuel in and now no power and engine warning light with lightning bolt on it.

I wish I could tell you that it would be OK to drive to the next town, but I can't. I'll bet that the rusty fuel you put in your car had a high water content. Now the water is...

Q: Vehicle wont start

The fuel system pressure should be checked to see if it is within specifications to start the vehicle and open the injectors. If the pressure is too low or no pressure then check the fuel pump connector and if it...