Natural Gas Vs Gasoline Fuel: Difference, Pros And Cons 2023

For automobile internal combustion engines, natural gas vs gasoline is used as fuel. A number of manufacturers supply cars with a dual fuel system designed for liquid and natural gas fuels. Other vehicles will require the installation of additional equipment for the supply of methane or propane, followed by registration of the changes made to the traffic police.

Natural Gas Vs Gasoline Fuel: Difference, Pros And Cons

Features of the use of gasoline as a fuel

Features of the use of gasoline as a motor fuel:

  1. When developing a car, the type of engine and the features of the fuel supply system are taken into account. Mounting an additional cylinder reduces the useful capacity of the luggage compartment, and additional lines can be destroyed in collisions.
  2. Since gasoline is in a liquid state at normal atmospheric pressure, the specific consumption is lower than when using natural gas.
  3. A mixture of gasoline with air has an increased calorific value, providing improved engine parameters. Gas engines are inferior in performance to gasoline counterparts (the disadvantage is partially eliminated on units with propane or methane injection into the intake manifold cavity).
  4. Cars with gasoline engines do not require additional documents. Consideration should be given to the prevalence of filling stations with liquid fuel and the simplified process of filling fuel into the tank.

Let’s take look at Hydrogen Cars Vs Electric Cars if you are interested.

Features of the use of natural gas as car fuel

When installing gas equipment, consider the following:

  1. For internal combustion engines, a compressed or liquefied mixture of propane and butane or pure methane is used.
  2. The increased octane rating of the gas fuel eliminates the risk of detonation during combustion.
  3. The reduced combustion temperature and the preservation of the oil film on the cylinder mirrors provide an increase in the resource before overhaul by 50-70%. The resource of electrodes of spark plugs is 1.7-2.0 times higher.
  4. Reduced heat generation reduces the load on engine parts and the cooling system. At the same time, one should take into account the drop in the efficiency of the interior heating system connected to the engine jacket.

natural gas vs gasoline Fuel: Difference, Pros and Cons

When choosing the type of fuel, it is necessary to evaluate all the facts for and against, which can be divided into categories:

  • price characteristics of fuel and cruising range without refueling;
  • exhaust toxicity and impact on the atmosphere in the cabin;
  • the resource of the piston group and the gas distribution mechanism;
  • motor power and torque;
  • easy start at low ambient temperature.

It should be noted that gasoline is required to start a motor with a gas supply system. The stock of liquid fuel is stored in a standard tank or a separate container, theoretically cars have an increased range without refueling. After starting the engine, the supply of gasoline is turned off manually by a toggle switch or control unit (the algorithm depends on the design features and generation of gas-balloon equipment).

natural gas vs gasoline Price

When evaluating financial profitability, it is necessary to take into account both the price of fuel and equipment, as well as mileage. For example, unleaded A-95 gasoline has an average price of $4.05/gallon, and gas (a compressed mixture of propane and butane) will cost the driver an amount of $2.88/GGE. When calculating, it is necessary to take into account an increase in fuel consumption by 25-35%, so gas-balloon equipment will pay off in 1-2 years with monthly runs within 2 thousand km.

Environmental friendliness

When evaluating environmental friendliness, the features of the engine exhaust system should be taken into account. For example, on motors with feedback catalytic converters, the exhaust gases are after-burned and meet Euro-3 and higher standards, since fewer hydrocarbons, carbon monoxide, and nitrogen oxides are released during the combustion of natural gas, which are after burned in the converter. As a result, the load on the node drops, and the resource increases. On gas vehicles with a carburetor power system without a converter, harmful emissions into the atmosphere are reduced.

Engine safety

When natural gas fuel is supplied, a layer of lubricant remains on the cylinder walls, fuel vapors do not penetrate into the sump and do not accelerate the degradation of the lubricant. Improved working conditions have a positive effect on the resource of mating parts, the mileage to overhaul increases by 30-50%. To extend the life of the engine, it is necessary to carry out timely maintenance using engine oil with the viscosity recommended by the manufacturer.

An additional advantage of gas is the reduced amount of carbon deposits that form on valves, combustion chamber walls and grooves for installing piston rings. Owners note a decrease in oil burnout, but with frequent starts of the engine on gasoline at low air temperatures, deposits may appear.

The increased octane number of gas fuel prevents the detonation combustion process, in addition, there are no harmful additives in the fuel and it is impossible to falsify the mixture.


When using gas equipment on carburetor engines, the drop in power and torque is 15-20%. When operating the machine with a full load, the driver has to open the throttle harder when accelerating or driving uphill. As a result, fuel consumption increases and economic efficiency decreases with a simultaneous extension of the payback period of the equipment.

natural gas vs gasoline smell in car cabin

With a working exhaust system, foreign odors do not enter the passenger compartment. If the gaskets, pipelines, or corrugated sections are damaged, extraneous sounds appear, and part of the exhaust penetrates the passengers. The defect occurs on any motor and does not depend on the type of fuel. No leakage of fuel vapors from storage tanks or connecting hoses is allowed (requirement applies to both gasoline and gas mixture).

natural gas vs gasoline smell: Operation in winter

Starting an engine with gas-balloon equipment in winter is no more difficult than starting a gasoline engine. The driver needs to monitor the condition of the battery, starter, and connecting wires and fill the crankcase with oil with the appropriate viscosity characteristics. To simplify starting at temperatures below -40°C, external heating systems or autonomous Webasto or Eberspacher heaters are used. In winter, the efficiency of the engine drops by 10-25%, regardless of the aggregate state of the fuel.

Here is detailed guide on Difference Between Kerosene And Gasoline Fuel.

is natural gas better than gasoline?

is natural gas better than gasoline?

After a potential buyer or car owner has found out all the pros and cons of operating gas equipment, a choice must be made. Equipping passenger cars with a cylinder in the trunk reduces the usable volume of the cargo compartment. To compensate for the deficiency, the tank is mounted in the spare wheel niche, but in this case, it is necessary to carry a first aid kit for tire repair.

When buying a new car, you should take into account the difference in price.

The manufacturer claims fuel savings of 3 times, switching to gas reduces power from 106 to 96 hp. With. with a corresponding drop in dynamics and top speed. At the same time, the power reserve without refueling was increased to 1000 km.

When choosing gas equipment, you should pay attention to the design features of the engine. Not all power units can be converted to gas. For example, there are difficulties when installing systems on VAG car engines with a direct fuel injection system and supercharging or on BMW or Mercedes Benz V-shaped engines.


Natural Gas fuel for a car is more profitable in the case of large annual mileage (not less than 40 thousand km). It should be borne in mind that the installation of cylinders and a reducer must be carried out in a certified service with the issuance of relevant documents. Then the owner needs to contact the traffic police and make changes to the registration certificate. The operation of a car with a gas cylinder without registration is prohibited. If a violation is detected, a fine is imposed on the owner (with repeated fixation, arrest for up to 15 days is possible).

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