Petrol, diesel, CNG or electric: which used car makes sense for you?

When you are buying a used car, the fuel type affects your running costs, your maintenance bills and the price you will get when you sell it on. There is no single best choice. It depends on how much you drive and where.

Petrol

Petrol cars are usually cheaper to buy and cheaper to maintain than diesel ones, and they are smooth and quiet in city traffic. Fuel costs more per kilometre than diesel or CNG, so a petrol car makes most sense if you drive less than about 1,000 km a month. For most families using a car for daily city trips and the occasional long drive, a petrol car is the simplest and safest choice.

Diesel

Diesel engines give better mileage and more pulling power, which suits long highway drives, heavy loads and hilly roads. The trade-offs are a higher purchase price, costlier servicing and repairs, and stricter rules on older diesel vehicles in some cities. A used diesel car makes sense if you drive a lot every month and plan to keep the car for several years. Check the service history carefully, because a neglected diesel engine is expensive to fix.

CNG

CNG has the lowest fuel cost per kilometre of the three, which is why it is popular with taxis and people who drive long distances every day. In Kerala, the number of CNG stations has been growing but is still limited in many areas, so check where your nearest station is before you buy. A CNG car also loses some boot space to the cylinder. If you are buying a car with an aftermarket CNG kit, make sure the kit is approved and recorded on the RC.

Electric

Electric cars are very cheap to run, especially if you can charge at home, and they have far fewer parts that need regular servicing. The battery is the most important thing to check on a used EV. Ask about its health, how far the car actually goes on a full charge today, and how much of the battery warranty is left. Used EVs are still newer to the market, so resale values are harder to predict.

A simple way to decide

1. Low monthly driving, mostly in the city: petrol.

2. High monthly driving, lots of highway: diesel, or CNG if there are stations near you.

3. Predictable daily trips and home charging: electric.

Whatever you choose, the condition of the individual car matters more than its fuel type. Inspect it carefully, take a proper test drive, and check the documents before you pay.

Browse cars of every fuel type near you on Flystore.