Fuel Sources

American Power Group’s Dual Fuel Technology provides diesel engine owners substantial fuel savings and reduced emissions while retaining their diesel power requirements and torque performance – all with the option of returning to the base diesel engine operation at any time.

The primary fuel used in APG’s dual fuel engines is diesel (petroleum diesel, biodiesel or renewable diesel) with several options for a secondary fuel.

Natural Gas Burning


Compressed natural gas (CNG) is a fuel made by compressing and pressurizing natural gas. It can be transported and stored in a compact and portable form, making it an excellent alternative fuel for vehicles. CNG is considered to be a cleaner-burning fuel than diesel and also less expensive, making it an economically attractive option for engine fleets.


Renewable natural gas (RNG) is generated from the decomposition of organic waste materials, producing the same primary component of natural gas. It can be used in the same applications as natural gas, including transportation fuel. RNG is derived from renewable sources, is carbon-neutral and can help mitigate greenhouse gas emissions.


Liquid natural gas (LNG) is natural gas that has been cooled to a very low temperature (-162°C/-260°F) so that it can be transported and stored in a liquid form. It is odorless, colorless, non-corrosive and nontoxic. LNG is gaining popularity as a leaner alternative to diesel and other fossil fuels, as it emits significantly fewer greenhouse gases when burned.

Conditioned Well-Head Gas

Conditioned Wellhead Gas, also known as associated gas, is a gas that has been released from the wellhead as part of the drilling or fracturing process and undergone a conditioning treatment, which eliminates heavy gasses to meet industry gas composition standards for use in combustion engines.

Learn more about APG and Dual Fuel Technology

View our FAQ page for more information about our advanced Dual Fuel Technology.