CNG

Insufficient infrastructure
Every alternative fuel which tries to compete with traditional sources of energy suffers from a lack of infrastructure necessary for widespread use. In the case of natural gas, the main problem is the lower number of fuel stations.

Higher cost
a) Higher cost of a vehicle:
- the conversion of a vehicle to natural gas increases the price by the cost of installation and certification of an additional fuel system,
- serially production vehicles are more expensive (smaller production run, individual manufacture)
b) The cost of fuel stations is higher, and fuel system components are more expensive

Because vehicles powered by natural gas are not widespread and are manufactured in a limited range, the cost is higher. However, as the use of natural gas in transportation becomes more widespread, the cost should go down.

Deterioration of existing comfort

• The fuel system must be regularly inspected.
• The trunk or the interior space is reduced by the space necessary for the installation of gas bottles.
  
  This problem can be alleviated by installing gas bottles on the roof (buses), under the chassis (passenger cars, trucks), or in a different place (spare wheel compartment).

Operating disadvantages

• The total weight of a vehicle is increased, reducing the maximum load, due to the installation of the pressure tank holding the natural gas. This disadvantage can be minimized by using bottles made of composite materials that can be up to five times lighter than steel.
• Vehicles powered by natural gas are subject to stricter safety measures (use of garages, repairs, etc.).
• The engine power is reduced (5 - 10 %) in the case of converted vehicles.
• CNG vehicles have a shorter traveling distance compared to traditional fuels (200 - 250 km in the case of an automobile converted for the use of natural gas).