Benefits Of CNG

The distinct advantages of using CNG will build a lasting relationship between CNG and its customers

Clean and Green fuel

Commonly referred to as the green fuel because of its lead and sulphur free character, CNG reduces harmful emissions. Being non-corrosive, it enhances the longevity of spark plugs. Due to the absence of any lead or benzene content in CNG, the lead fouling of spark plugs and lead or benzene pollutants are eliminated.

Maintenance Advantage

Another practical advantage observed is the increased life of lubricating oils, as CNG does not contaminate and dilute the crankcase oil. Intervals between oil changes for CNG vehicles are dramatically extended depending on how the vehicle is used.

Performance Advantage

CNG has an octane rating of 127 and has a slight efficiency advantage over petrol.

Mixes evenly in air

Being a gaseous fuel, CNG mixes easily and evenly in the air.

Low operational cost

The operational cost of vehicles running on CNG, as compared to those running on other fuels, is significantly low.


CNG is less likely to auto-ignite on hot surfaces, since it has a high auto-ignition temperature (540 degrees centigrade) and a narrow range (5%-15%) of inflammability. It means that if CNG concentration in the air is below 5% or above 15%, it will not burn. This high ignition temperature and limited flammability range makes accidental ignition or combustion very unlikely.

Properties Unit Petrol Diesel LPG CNG
Relative density Water = 1 0.74 0.84 0.55 -
Relative density Air =1 - - 1.285 0.64
Properties Unit Petrol Diesel LPG CNG
Temperature Degree C 360 280 374 540
Flammability Range % in Air C 1-8 0.6-5.5 2.2-9.0 5-15
Flame Temperature Degree C 2,030 1,780 1,983 1,900
Octane Number - 87 - 93 127
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