Frequently Asked Questions about
Compressed Natural Gas (CNG) Conversions

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What is compressed natural gas (CNG)?

Compressed natural gas (CNG) is natural gas stored at high pressure. Natural gas primarily consists of methane, but commonly includes varying amounts of alkanes, carbon dioxide, nitrogen, and hydrogen sulfide. CNG is made by simply compressing natural gas. Natural gas is often used in our homes for heating and cooking but it can also be used in place of petroleum products such as gasoline and diesel fuel. Natural gas has an octane rating of about 130, which means it has an efficiency advantage over gasoline. Natural gas is also the cleanest burning fossil fuel because the main byproducts of combustion are carbon dioxide and water vapor, the same compounds we exhale when we breathe.

Will compressed natural gas (CNG) harm my engine?

No. Compressed natural gas (CNG) is actually better for your engine because it burns cleaner. CNG does not contain lead, so spark plug life is extended because there is no fouling. Plus, CNG does not dilute or contaminate crankcase oil. This reduces maintenance costs and the overall life of the engine.

Can the compressed natural gas (CNG) cylinder explode in an accident?

A CNG cylinder is a very strong and thick storage tank and is just as safe as, or safer than, a thin plastic or metal gasoline tank. Worldwide, millions of trucks, busses, and cars have been safely driving on CNG for many years including federal, state, and local government vehicles.

Can a compressed natural gas (CNG) conversion be installed on a diesel engine?

Yes. A diesel engine requires a dual-fuel system with the proper diesel/CNG mix to operate safely at peak performance. The conversion will be a mixture of the two fuels simultaneously with impressive added power and fuel economy.

Where can I fill my vehicle with CNG?

Hundreds of compressed natural gas (CNG) fueling stations are available across the United States. New stations are opening daily. For the most comprehensive, up-to-date list, please visit the interactive Alternative Fueling Station Locator.

Can I use the natural gas at my commercial or residential location?

Yes. Many compressors are available for both residential and fleet applications large and small. Our consulting team will work with you to design the appropriate fueling station for your application.

How much compressed natural gas (CNG) will my vehicle use?

The amount of CNG used depends on the vehicle size and engine. There may only be minor variations in the actual fuel mileage between petroleum and CNG. To calculate annual savings, please refer to our Compressed Natural Gas Savings Calculator.

Will I be able to receive tax credits?

We closely monitor the latest tax credits, incentives, and funding opportunities. We will help you determine if there is a tax credit available and if your CNG conversion qualifies.

Are CNG-ONE compressed natural gas (CNG) conversions EPA approved?

CNG-ONE diligently monitors and complies with all local, state and federal guidelines and will assist you in selecting the system that best satisfies your particular requirements. All CNG-ONE vehicle conversions are installed and inspected by a certified Gaseous Fuel Technician (GFT).

Does a compressed natural gas (CNG) conversion violate the Clean Air Act?

No. None of our CNG conversions alter the engine control unit (ECU) and no emission systems are modified.

Will I be able to pass my state inspections?

Yes. You should not have any trouble passing your inspections. Our installation includes, where available, EPA emissions testing before and after installation. Typically, emissions are much lower with compressed natural gas (CNG).

How long will my compressed natural gas (CNG) conversion last?

CNG-ONE designs and installs high quality CNG conversions that will last for many years and will most likely outlast the life of the vehicle.

Once I have my vehicle converted to compressed natural gas (CNG) can it be removed?

Yes. CNG conversions can be removed from your vehicle. You can even install your CNG conversion in another vehicle, however you may need a few different parts.

Can I sell my vehicle as a compressed natural gas (CNG) converted vehicle?

Yes. You can sell your vehicle as-is without removing the CNG conversion. CNG vehicles typically sell for a much higher price.


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