Everything You Need to Know About a 2nd Hand CNG Car

A 2nd hand CNG car offers excellent fuel savings and lower running costs compared to petrol vehicles. Buying a used compressed natural gas car can save you thousands of rupees every year on fuel. This guide covers everything you need to know about inspection, maintenance, costs, and benefits before you buy.

A 2nd hand CNG car can be one of the smartest vehicle purchases you ever make. If you want to save money on fuel and reduce your environmental footprint, a used compressed natural gas vehicle checks both boxes. Over the past few years, more Indian car buyers have turned to CNG cars for their daily commutes and long drives.

But buying a used CNG car is not the same as buying a regular petrol vehicle. There are specific things you need to check. The CNG kit, the engine condition, and the overall maintenance history all play a big role in how well the car performs. In this guide, we will walk you through everything you need to know about buying a second hand CNG car. From understanding how CNG engines work to spotting a good deal and avoiding bad ones, we have got you covered.

Whether you are a first-time buyer or someone looking to upgrade your current ride, this article will give you the confidence to make the right choice. Let us dive in.

Key Takeaways

• Lower fuel costs: CNG is significantly cheaper than petrol, making a 2nd hand CNG car a smart budget choice.
• Eco-friendly option: CNG vehicles produce fewer harmful emissions than petrol cars.
• Check the CNG kit carefully: The quality and age of the CNG kit matters a lot in a used car.
• Regular maintenance is essential: CNG cars need specific upkeep to run smoothly and safely.
• Resale value is growing: More buyers are looking for used CNG cars, boosting demand.
• Watch for common mistakes: Avoid buying without a proper inspection or ignoring kit age.

What Is a 2nd Hand CNG Car and Why Do People Buy Them?

A 2nd hand CNG car is simply a vehicle that runs on compressed natural gas and has had a previous owner. CNG cars use a mixture of petrol and gas or run entirely on gas, depending on the setup. The dual fuel car system allows drivers to switch between petrol and CNG with the push of a button.

People buy used CNG vehicles for many reasons. The biggest one is cost savings. CNG fuel costs much less than petrol. In cities like Delhi, Mumbai, and Lucknow, where fuel prices are high, a CNG car makes a lot of sense. Another reason is the environment. CNG burns cleaner than petrol, which means fewer harmful gases go into the air.

Many buyers also look for a used CNG car because of the growing demand. CNG cars hold their value well, and finding a buyer later is usually easy. If you are planning to buy a second hand CNG car, understanding these benefits is the first step.

How Does a CNG Engine Work?

A CNG engine works similarly to a petrol engine, but with one key difference. Instead of only using petrol, the engine burns compressed natural gas. The gas is stored in high-pressure cylinders, usually placed in the trunk of the car. A CNG kit is installed to mix the gas with air before it enters the engine.

Most CNG cars on the road today are dual fuel. This means you can drive on petrol when the CNG tank is empty. The car automatically switches between fuels. This setup gives you the best of both worlds. You get the savings of CNG and the convenience of petrol when you need it.

Benefits of Buying a Used CNG Car

There are many advantages to owning a 2nd hand CNG car. Let us look at the biggest benefits that make these vehicles so popular.

1. Significant Fuel Savings

CNG costs about one-third to one-half the price of petrol. If you drive a lot every day, those savings add up quickly. A used CNG car can save you thousands of rupees every year on fuel bills. Over the lifetime of the car, the savings can be enormous.

2. Lower Running Costs

Beyond fuel savings, CNG engines tend to need less maintenance. Natural gas burns cleaner than petrol, which means less wear and tear on the engine. The spark plugs last longer, and the oil stays cleaner for a more extended period. This leads to lower overall CNG car maintenance costs.

3. Better for the Environment

CNG is a cleaner-burning fuel. It produces fewer carbon monoxide and nitrogen oxide emissions compared to petrol. If you care about reducing your carbon footprint, a 2nd hand CNG car is a great step in the right direction.

4. Good Resale Value

CNG cars are in high demand in the used car market. More and more buyers are looking for used CNG vehicles because of the fuel savings. This means your car will likely sell faster and at a better price compared to a similar petrol car.

5. Government Incentives

In many states, CNG cars enjoy lower road tax and registration fees. Some cities also offer perks like exemption from odd-even rules or priority parking. These incentives make owning a CNG vehicle even more attractive.

Things to Check Before Buying a 2nd Hand CNG Car

Buying a second hand CNG car requires extra attention compared to a regular used car. Here is a detailed checklist of everything you should inspect before making a purchase.

Check the CNG Kit Brand and Age

The CNG kit is the heart of any CNG car. Before you buy, find out which brand the kit is from. Popular and reliable brands include Landi Renzo, BRC, and Lovato. Avoid cars with unknown or very old kits. A kit that is more than 5 to 7 years old may need replacement soon.

Ask the seller for the kit’s installation date and brand. If they cannot provide this information, that is a red flag. A good CNG kit can last 8 to 10 years with proper care, but a cheap or worn-out kit can cause many problems.

Inspect the Cylinders

The CNG cylinders store the gas under high pressure. Check for any visible rust, dents, or damage on the cylinders. The cylinders must have a valid fitness certificate. In India, CNG cylinders need to be tested every 5 years. Make sure the current cylinder is within its testing period.

Test Drive on Both Fuels

Always take the car for a test drive on both CNG and petrol. Pay attention to how the car starts and runs on each fuel. On CNG mode, the engine should start smoothly and run without any jerks. If you feel any hesitation, knocking, or power loss, the CNG car may have underlying issues.

Check the Mileage Claims

One of the main reasons people buy a used CNG car is for better mileage. Ask the seller about the average mileage they get on CNG. A typical CNG car mileage ranges from 25 to 35 km per kg, depending on the car model and driving conditions. If the mileage seems too good to be true, it probably is.

Review the Service History

Ask for the complete service records of the car. A well-maintained 2nd hand CNG car will have regular service entries. Look for records of CNG kit servicing, cylinder inspections, and general maintenance. If the car has no service history, be cautious.

Get a Pre-Purchase Inspection

Even if the car looks good, always get a professional CNG car inspection done before buying. A mechanic who specializes in CNG cars can spot issues that an untrained eye might miss. They will check the engine, the CNG lines, the reducer, and the overall condition of the vehicle.

CNG Car Maintenance Tips for Used Car Owners

Owning a 2nd hand CNG car comes with some specific maintenance needs. Following these tips will keep your car running smoothly and safely.

Service the CNG Kit Regularly

Your CNG kit needs servicing every 10,000 to 15,000 km. During servicing, the mechanic will check the reducer, fuel lines, solenoid valves, and filters. Regular servicing prevents minor issues from turning into expensive repairs. Do not skip these services, even if the car seems to be running fine.

Check for Leaks

CNG leaks are a serious safety concern. Always check for gas smells around the car, especially near the cylinders and fuel lines. If you notice any smell, get the car inspected immediately. A simple leak detection test at a service center can save you from potential danger.

Keep the Cylinder Valves Clean

Make sure the cylinder valves are clean and free from dust and debris. Dirty valves can affect gas flow and engine performance. During regular servicing, ask the mechanic to clean and inspect the valves.

Use Quality CNG Fuel

Not all CNG stations are the same. Always fill up from trusted and well-known CNG stations. Poor quality CNG can damage the engine and the kit over time. It can also reduce your CNG car mileage significantly.

Do Not Run on Empty Petrol

If your car is a dual fuel setup, do not let the petrol tank go completely empty. Keeping at least half a tank of petrol helps the engine start smoothly and keeps the fuel system in good condition.

Replace Filters on Time

The CNG filter and the petrol filter both need regular replacement. A clogged filter can reduce engine performance and increase fuel consumption. Follow the manufacturer’s recommended replacement schedule for best results.

Quick Tips for CNG Car Owners

• Always keep a spare CNG key in a safe place.
• Do not smoke near the car when refueling.
• Check the cylinder pressure gauge regularly.
• Avoid long idling on CNG mode.
• Park the car in shaded areas to protect the cylinders from heat.

CNG Car Cost Savings vs Petrol Cars

One of the biggest reasons people choose a 2nd hand CNG car is the savings. Let us look at how CNG compares to petrol in terms of cost.

Fuel Cost Comparison

Petrol prices in India have been rising steadily. CNG, on the other hand, remains significantly cheaper. On average, CNG costs about 40 to 50 percent less than petrol per kilometer. For a daily commuter, this difference is huge over the course of a year.

For example, if you drive 50 km every day, a petrol car might cost you around 80 to 100 rupees per day in fuel. A similar CNG car would cost you only 40 to 50 rupees per day. That is a saving of nearly 50 percent on your daily fuel expense.

Maintenance Cost Comparison

CNG cars generally have lower maintenance costs than petrol cars. The cleaner burning fuel means less carbon buildup in the engine. Oil changes are needed less frequently. Spark plugs last longer. Over a 5-year period, the maintenance savings can be substantial.

Insurance Costs

Insurance premiums for used CNG cars are usually similar to petrol cars of the same model. However, if the CNG kit was installed after purchase, you may need to inform your insurance provider. Some insurers may charge a small additional premium for factory-fitted CNG kits.

Total Cost of Ownership

When you factor in fuel savings, lower maintenance costs, and good resale value, a 2nd hand CNG car has a lower total cost of ownership compared to a petrol car. Over 5 years, the savings can easily amount to 1 to 2 lakhs, depending on your driving habits.

Factor	Petrol Car	2nd Hand CNG Car
Fuel Cost per Km	Higher	Lower
Maintenance Cost	Moderate	Lower
Resale Value	Good	Good to Very Good
Engine Wear	Higher	Lower
Environmental Impact	Higher	Lower
Insurance Premium	Standard	Similar or Slightly Higher

Common Mistakes to Avoid When Buying a Used CNG Car

Buying a 2nd hand CNG car can be tricky if you do not know what to look out for. Here are some common mistakes that buyers make and how to avoid them.

Mistake 1: Skipping the CNG Kit Inspection

Many buyers focus only on the car’s exterior and engine condition and forget about the CNG kit. The kit is what makes the car run on gas. A worn-out or poorly installed kit can lead to performance issues, safety risks, and expensive repairs. Always inspect the kit thoroughly or get a professional opinion.

Mistake 2: Ignoring the Cylinder Fitness Certificate

CNG cylinders must have a valid fitness certificate. Without it, the cylinder is not safe to use. Never buy a car with an expired or missing cylinder certificate. This is a non-negotiable safety requirement.

Mistake 3: Buying from an Unreliable Seller

Always buy from a trusted source. Whether it is a certified dealer, a reputed online platform, or a known individual, make sure the seller has a good track record. Buying from an unknown seller increases the risk of hidden problems.

Mistake 4: Not Test Driving on CNG Mode

Some sellers will only let you test drive on petrol mode. This is a red flag. You need to experience how the car runs on CNG. A test drive on both fuels gives you a complete picture of the car’s condition.

Mistake 5: Overlooking the Age of the CNG Kit

A very old CNG kit can be a costly problem waiting to happen. Kits older than 7 years may need replacement soon, which can cost anywhere from 25,000 to 60,000 rupees. Always ask about the kit’s age and condition before finalizing the purchase.

Mistake 6: Not Checking for Rust and Corrosion

CNG cylinders and fuel lines are susceptible to rust, especially in humid climates. Check the undercarriage and the trunk area for any signs of rust or corrosion. Rust on the cylinders is a serious safety concern and should not be ignored.

Is a 2nd Hand CNG Car Worth It?

The short answer is yes. A 2nd hand CNG car is worth it for most buyers, especially if you drive a lot and want to save on fuel costs. The key is to buy smart. Do your research, inspect the car thoroughly, and make sure the CNG kit and cylinders are in good condition.

If you are a daily commuter or someone who drives long distances regularly, the fuel savings from a used CNG car can be transformative. You will notice the difference in your monthly expenses almost immediately. Add in the lower maintenance costs and good resale value, and the math really works in your favor.

However, if you drive very little or only use the car occasionally, a petrol car might still make more sense. The upfront cost of a 2nd hand CNG car is usually slightly higher than a comparable petrol car because of the CNG kit installation. It may take some time for the fuel savings to offset this difference.

Ultimately, a second hand CNG car is a great investment for the right buyer. Just make sure you follow the tips and advice in this guide. Take your time, do your due diligence, and you will find a reliable and economical vehicle that serves you well for years to come.

Remember, the goal is not just to buy a car but to buy the right car. A well-maintained 2nd hand CNG car can give you excellent value, peace of mind, and a greener way to drive. Happy car hunting!

Frequently Asked Questions

What is the average cost of a 2nd hand CNG car?

The price of a used CNG car varies depending on the make, model, and year. Generally, a second hand CNG car costs 10 to 20 percent more than a similar petrol car. The extra cost is because of the CNG kit and cylinders already installed. Popular models like the Maruti Suzuki Wagon R, Alto, and Dzire are available at affordable prices in the used market.

How long does a CNG kit last in a used car?

A good quality CNG kit can last between 8 to 10 years with regular servicing. The cylinders usually have a lifespan of 15 to 20 years if properly maintained. Before buying a 2nd hand CNG car, always check the age of the kit and the last servicing date to ensure you are getting a reliable setup.

Is it safe to buy a 2nd hand CNG car?

Yes, it is safe as long as you buy from a trusted source and get a thorough inspection. Make sure the CNG cylinders have a valid fitness certificate, the kit is from a reputable brand, and there are no visible leaks or damage. A professional CNG car inspection before purchase is highly recommended.

Does a CNG car lose power compared to a petrol car?

A dual fuel car may show a slight reduction in power when running on CNG mode. This is normal because CNG has a lower energy density than petrol. However, the difference is usually not noticeable in city driving. On the highway, you might feel a small drop in acceleration, but overall performance remains good.

Can I convert my petrol car to CNG instead of buying a 2nd hand CNG car?

Yes, you can get a CNG conversion done on a petrol car. However, factory-fitted CNG cars are generally safer and more reliable than aftermarket conversions. If you already own a petrol car, a conversion can be a cost-effective option. But if you are buying specifically for fuel savings, a used CNG vehicle comes with the kit already installed and tested.

What is the mileage difference between CNG and petrol cars?

A CNG car typically delivers 25 to 35 km per kg of gas, while a petrol car gives around 15 to 20 km per liter. The exact figures depend on the car model, driving style, and road conditions. In terms of cost per kilometer, CNG is significantly cheaper, making it a popular choice for budget-conscious drivers.

=== CONCLUSION ===

Buying a 2nd hand CNG car is a smart and economical choice for today’s car buyers. With lower fuel costs, reduced maintenance expenses, and a growing resale market, these vehicles offer excellent value for money. By following the tips in this guide, you can confidently navigate the used CNG car market and find a reliable vehicle that fits your budget and needs.

Remember to always inspect the CNG kit, check the cylinder certificates, and get a professional inspection before finalizing your purchase. A little extra effort upfront can save you from costly surprises down the road. Whether you are commuting to work or planning a road trip, a well-maintained second hand CNG car will serve you reliably for many years. Start your search today and enjoy the benefits of affordable, clean, and efficient driving.