CNG harm engine in any way?

A common belief is that CNG is not good enough for performance machines but that is not the case. CNG has a higher octane rating than petrol and theoretically should be able to exhibit better performance from the engine as compared to petrol powered engines. However a CNG engine lacks the torque that can help a vehicle achieve higher and faster speeds. Fine tune the engine, adjust the timing and you definitely can achieve spot-on performance from the CNG as compared to the petrol van. Even if we were to keep the better economy factor aside, CNG still offers a number of benefits. The fact that CNG enters the engine in the form of gas instead of spray or mist prevents the wash down of the lubricating oil from the top piston ring area keeping the engine�s rate of depreciation to a bare minimum. In addition, the octane number of CNG being 130 as compared to 87 of that of petrol helps thorough and rapid mixing of gas and air in the correct proportion, thereby improving the combustion efficiency.

Is the CNG option safe?
Four key features make CNG a safer fuel than petrol, diesel or LPG. With specific gravity of 0.587, it is lighter than air so in case of leaks, it rises up and dissipates into air. (Other fuels form puddles on the ground in case of leaks.) CNG has a 700 degree Centigrade ignition temperature compared to 455 degree Centigrade for petrol. The range of 4 to 14 per cent in which CNG mixes with air by volume for combustion is small. Storage is far safer than for petrol, as CNG cylinders are designed and built from special materials and to high safety specifications.

Will CNG harm my engine in any way?
Use of CNG serves to extend life of lubricating oil as CNG will not contaminate or dilute crankcase oil. Fouling of plugs is eliminated and plug life is enhanced as CNG does not contain any lead. CNG enters the engine as gas while petrol comes in as spray or mist which washes down the lubricating oil from the piston ring area to raise the rate of engine depreciation. This reduces maintenance costs and engine life goes
How does a CNG vehicle compare to a petrol powered one on performance parameters?
Easy starts, steady idling and smooth acceleration are virtues of CNG run vehicles. Power loss of 5-15 per cent means that acceleration is slower, which can be eradicated with spot-on tuning of the CNG kit, by advancing spark timing to derive benefit of its high octane rating. However the power loss is less than noticeable in city driving.up.