CNG cylinder expiry date and cylinder life

The two dates on an Indian CNG cylinder, showing a hydrostatic test due every three years under rule 35 of the Gas Cylinders Rules 2016 as amended in April 2025, and a service life of twenty years for on-board CNG cylinders under the Explanation to rule 36, with both dates stamped on the neck end of the cylinder

Two separate dates govern the tank in your CNG car, and they get mixed up constantly. The CNG cylinder expiry date is the end of the cylinder’s service life, which Indian rules put at twenty years for an on-board CNG cylinder. Past it the tank can’t be refilled, can’t be tested back into service and …

Read more

CNG cylinder testing price in India

CNG cylinder testing price in India, showing a range of ₹1,200 to ₹3,000 for the single cylinder in a passenger car with most quotes between ₹1,500 and ₹2,200, a three year test interval written into rule 35 of the Gas Cylinders Rules 2016, and testing done only at stations recognised by the Chief Controller of Explosives

The CNG cylinder testing price in India is ₹1,200 to ₹3,000 for the single cylinder in a passenger car, and most quotes land between about ₹1,500 and ₹2,200. The test falls due every three years, and only a cylinder testing station recognised by the Chief Controller of Explosives is allowed to do it. Set aside …

Read more

CNG car maintenance cost per year

Annual CNG car maintenance cost breakdown for India, showing engine oil every 7,500 km against 10,000 km on petrol, a CNG filter every 15,000 to 20,000 km at ₹400 to ₹900 per service, heat resistant spark plugs earlier than petrol, valve clearance adjusted more often, and a full year of scheduled servicing at ₹9,000 to ₹12,000

The CNG car maintenance cost for a moderately driven car in India is ₹9,000 to ₹12,000 a year, which is about ₹3,000 to ₹4,000 more than the same car would cost you to service on petrol. So where does the extra go? Your oil comes round sooner, there’s a filter petrol cars don’t carry at …

Read more

Petrol to CNG conversion cost in India

Cost breakdown for converting a petrol car to CNG, showing kit and fitting at ₹40,000 to ₹60,000, the RC endorsement at ₹1,000 to ₹3,000, the insurance endorsement at ₹1,500 to ₹3,500 and a day one total of ₹42,500 to ₹66,500

The full petrol to CNG conversion cost in India is ₹42,500 to ₹66,500, and it’s only three line items: the kit and its fitting at ₹40,000 to ₹60,000, the RTO endorsement that records the alteration on your RC at ₹1,000 to ₹3,000, and the ₹1,500 to ₹3,500 your insurer charges to put the kit on …

Read more