Keep Your CNG Car Running Efficiently With These Smart Maintenance Tips

Jul 23, 2025 Nayra Jain

Check Cylinder & Valves Regularly

CNG cylinders should be inspected for leaks or physical damage every few months. Timely valve checks help prevent gas leakage and ensure optimum fuel pressure, contributing to both safety and fuel efficiency. Image Source: Meta-AI

Service The Reducer At Recommended Intervals

The pressure reducer regulates gas flow from the cylinder. Clogged reducers can affect mileage and performance, so have it serviced or cleaned every 20,000 km or as per your manufacturer’s recommendation. Image Source: Meta-AI

Monitor Spark Plug Health

Spark plugs in CNG cars wear out faster due to higher combustion temperatures. Replace them every 10,000–15,000 km to ensure proper ignition and smooth engine performance. Image Source: Meta-AI

Clean The Air Filter Frequently

Dusty Indian roads can clog air filters easily. A clean air filter supports proper air-gas mixture combustion, improving mileage and avoiding engine strain. Check and clean every 5,000 km. Image Source: Meta-AI

Check Injector Cleanliness

CNG injectors can accumulate carbon over time, affecting fuel flow. Use injector cleaning services periodically to maintain steady power delivery and better throttle response. Image Source: Meta-AI

Never Skip Dual-fuel Mode Usage

Even if your car runs mainly on CNG, run it on petrol occasionally. This keeps the petrol system active and prevents issues with fuel lines and injectors in petrol mode. Image Source: Meta-AI

Refuel At Certified CNG Stations Only

Always choose government-authorised CNG filling stations to avoid contaminated gas, which can damage engine components and reduce fuel efficiency significantly. Image Source: Meta-AI

Do Not Overfill The CNG Tank

Overfilling increases pressure beyond safe limits, risking leaks or even cylinder damage. Follow the station’s auto-cut system and avoid manual top-ups after the cut-off. Image Source: Meta-AI

Schedule ECU Calibration

Your car’s Electronic Control Unit (ECU) manages gas injection timing. Misalignment can lower performance. Get it checked and reprogrammed as advised during service intervals. Image Source: Meta-AI

Maintain Optimal Tyre Pressure

Tyre pressure impacts overall mileage. Underinflated tyres increase drag and fuel use. Maintain recommended levels and check weekly to support better ride quality and efficiency. Image Source: Meta-AI

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