It is great to have a car. However, for the majority of people, the moment they encounter something goes wrong, say a warning light flashes on the dashboard, or a tyre deflates, or the engine makes an odd sound, panic ensues. That’s because most vehicle owners just weren’t taught the rudiments of car ownership. They are able to operate a machine but they do not understand how it works.
This guide does just that. This article explains in simple and straightforward terms with real-life examples all the core principles that a car owner should know, whether it’s their first car or a many-year-old vehicle. No jargon or engineering theory. Real information to save you money, keep you safe and make you a better driver.
How a Car Engine Works — The Simple Version
The heart of your car is the engine. Its purpose is to make fuel (petrol, diesel or electricity) move. In a petrol or diesel car, this occurs by a process known as internal combustion.
The concept is simple: fuel comes into contact with air in a cylinder, the spark is fired, the fuel-air mixture explodes (in a small and controlled manner), and the resulting explosion forces a piston down. This up-and-down motion of the pistons turns into rotational motion that then rotates your wheels.
Example: Consider a bicycle pump. Pushing down on the handle increases the pressure. In an engine, the burning fuel generates pressure which pushes the piston down, and that energy is what is used to propel your car along.
Car engines range in size from 3, 4, 6 and 8 cylinders. The more cylinders the greater the power. The engine of Maruti Alto is 3 cylinder. A Toyota Fortuner is equipped with a 4-cylinder engine. A V8 or V12 engine is a 12-cylinder or 8-cylinder engine in a luxury sports car such as a Ferrari.
Unlike cars, electric cars (EVs) run on a battery pack and electric motor, which are powered by electricity instead of a combustion engine. No pistons, no spark plugs and no exhaust smoke. Hence, EVs are easier and less expensive to maintain.
Understanding Your Dashboard Warning Lights
Your car’s dashboard is what it uses to communicate with you. If a problem is present, a warning light will illuminate. One of the most frequent — and expensive — errors made by car owners is a failure to pay attention to the lights. These are the most crucial ones to remember.
| Warning Light | What It Means & What To Do |
| Engine Oil Pressure | Oil pressure is critically low. Stop the car immediately and check oil level. Driving further can destroy your engine. |
| Engine Temperature | Engine is overheating. Pull over, switch off, and let it cool. Never open the radiator cap when hot. |
| Battery / Charging | Battery is not charging properly. Drive to a service centre soon — car may stall. |
| Check Engine (MIL) | Something is wrong with the engine or emissions system. Visit a mechanic for a diagnostic scan. |
| Low Fuel | Fuel is nearly empty. Refuel within 40–50 km. Running on an empty tank harms the fuel pump. |
| Tyre Pressure (TPMS) | One or more tyres has low pressure. Check and inflate all tyres before driving further. |
| ABS Light | Anti-lock Braking System has a fault. Brakes still work, but ABS may not. Visit a mechanic. |
| Airbag / SRS Light | Airbag system fault detected. The airbags may not deploy in a crash. Get it checked immediately. |
Example – The engine temp light was red when Rahul was driving to work. He drove an additional 5 km but still did not stop. The engine overheated and seized up. Repair cost: ₹85,000. Had he stopped right there it could have been a simple ₹300 coolant top up.
Essential Car Fluids You Must Check Regularly
Your car isn’t just fueled with gas. There are a number of fluids that maintain different systems in good working order. These checks only take 10 minutes and can avoid very costly repairs.
| Fluid | Purpose & How Often to Check |
| Engine Oil | Lubricates engine parts and reduces friction. Check every 1,000 km or once a month. Change every 5,000–10,000 km depending on oil type. |
| Coolant (Radiator Water) | Prevents the engine from overheating. Check level in the overflow tank monthly. Refill with a 50:50 coolant-water mix — never plain water alone. |
| Brake Fluid | Transfers pressure from brake pedal to brake pads. Check every 6 months. Low or dark fluid means it’s time to change. |
| Power Steering Fluid | Makes steering light and easy. Check monthly. If steering feels heavy, fluid may be low. |
| Windshield Washer Fluid | Keeps your windshield clean. Refill with a washer fluid solution — avoid plain water as it can grow bacteria in the reservoir. |
| Transmission Fluid | Lubricates the gearbox. Check every 30,000–50,000 km or as per your car manual. |
Remember– when your car is off and on a flat surface, check the oil in the engine when it is cold! Remove the dipstick, clean it, replace it completely and remove it once more and read the level. It should be within the MIN and MAX limits.
Tyre Basics — The Only Parts Touching the Road
Tyres are perhaps the most critical part of the safety equipment on your vehicle. Each of the acceleration, braking and steering is accomplished by four small contact patches, about the size of a palm. Maintenance of tyres is a must.
Tyre pressure is the most crucial part to check. Each car has a recommended tyre pressure, which is generally provided by a sticker in the driver’s door or on a label in the owner’s manual. The PSI (pounds per square inch) or Bar indicates the pressure.
Note: A normal Maruti Swift has 33 PSI on the front and 36 PSI on the rear. Under-inflated tyres (at 25 PSI) will reduce the car’s fuel economy, make the tyres wear down more quickly, and make driving the car much more difficult. Excessive pressure (over-inflated) causes the centre of tyre to wear more quickly and traction may be lost on wet surfaces.
Regularly check tyres, especially before any long journey, at least once a month. Also, turn your tyres every 10,000 km to wear evenly. Front tyres are likely to wear out sooner than back ones since they have to cope with steering and (for FWD cars) also driving forces.
The method to check tyre tread depth: One way of checking the depth of the tyres is to put a ₹1 coin inside the tread groove. If you can see all of the coin plus the outer rim, then the tread is seriously worn and it is a good idea to replace the tyre immediately. The legal minimum tread depth is 1.6mm, but tyres which have less than 3mm tread depth are not safe on wet roads.
Brakes: How they work and when to change them
The most important safety system in your car is its braking system. Disc brakes are used on modern cars in place of drum brakes on the front (usually rear) wheels. The brake pedal is pressed and the pressure is transferred through the brake fluid to a calliper that presses brake pads against a rotating disc (rotor), which causes friction and causes the vehicle to slow down.
Symptoms that indicate brake problems:
- When brakes squeal or squeak on braking — typically indicates that brake pads have worn down to contact the metal wear indicator
- Grinding sound — metal to metal contact. Brake pads have been completely worn out. Cease driving and proceed to a workshop as soon as possible
- When brakes are applied, the car pulls to one side — one of the callipers is sticking or one brake pad is worn out.
- Spongy/soft brake pedal — air in brake lines or low brake fluid. Very dangerous
- Sensation of vibration when braking — brake discs (rotors) may be warped
Example: Priya heard a slight squeal when she applies the brakes, but didn’t pay attention to it for two months. At this time, the brake pads were completely worn and the brake discs had been damaged. Replacing just pads costs ₹2,000–₹4,000. She had to buy new pads and new discs for ₹12000. The cost of action taken if it was taken early would have saved ₹8000.
The lifespan of brake pads varies according to driving habits, ranging from 30,000 to 70,000 km. They wear out more quickly with city driving, due to frequent stops. Have brakes checked during every maintenance period.
Car Battery – the Electrical Foundation
The car battery has two primary roles: providing power to start the engine and supplying power to all electrical components like the lights, air conditioning, infotainment and the central locking system when the engine is not running. The typical life of a car battery is 3-5 years.
Here are some symptoms of a failing battery:
- Engine cranks slowly when you turn the ignition key
- The headlights seem to be less bright than normal.
- Electrical accessories like windows, AC blower etc. operate slowly.
- If the battery warning light comes on, the battery is low and should be replaced.
- On cold mornings, the car refuses to start.On cold mornings, car won’t start.
Pro Tip: The battery might go dead if your car is left unused for over 10-15 days. Maintain charge of battery by driving the car for 20-30 minutes weekly. If the car is going to be stored for a long period, then disconnect the negative terminal.
Example – Vikram’s car would easily start in the summer but not in the early morning in Delhi.Note: In summer it starts up fine, but on a cold winter morning in Delhi it doesn’t start. Over time, the battery was weakened and was 4 years old. By up to 20-30% battery capacity is lost in cold weather. You can perform a battery health check without any cost at any service station and you will get a clear reading of the battery.
Basic Car Maintenance Schedule – What to Do and When
The key to keeping your vehicle’s life is to follow the maintenance schedule. This is a basic and easy-to-follow guide.
| Interval | What to Do |
| Every Month | Check tyre pressure, check engine oil level, check all lights (headlights, brake lights, indicators), top up washer fluid |
| Every 5,000 km | Engine oil and oil filter change (for mineral oil). Check air filter condition. Check brake fluid level. |
| Every 10,000 km | Rotate tyres. Inspect brake pads and discs. Check coolant level and condition. Inspect drive belts. |
| Every 20,000 km | Replace air filter. Replace spark plugs (petrol cars). Check battery health. Inspect suspension components. |
| Every 40,000 km | Flush and replace brake fluid. Replace transmission fluid. Inspect tyres for replacement. |
| Every 60,000–80,000 km | Replace timing belt or chain (if applicable). Full brake system inspection. Replace coolant. |
| Annually (regardless of km) | Full multi-point inspection at authorised service centre. Check all fluid levels, lights, AC performance, and tyre condition. |
Always check the owner’s manual for the manufacturer’s recommended service intervals (these may differ depending on the model and engine type).
What to Do When Your Car Breaks Down
We’ve all experienced a breakdown on the road before, but if it happens, do the right things to keep you and other road users safe.
Make sure to stop on the leftmost side of the road or shoulder and signal. Do not stop in the middle of the lane.
- Turn on flashing lights right away (the four-way flashers). Keep them on all the time!
- After stopping your car, position reflective triangle marker or emergency marker 50-100 metres behind the car to alert approaching vehicles.
- Remain behind the barrier or away from traffic — don’t stop or stand next to your car behind or in front of it on a road with lots of cars.
- Contact your vehicle insurance company’s roadside assistance service (most Indian car insurance companies have a roadside assistance service and tow truck which is free) or trusted mechanic.
- Avoid doing major repairs on a congested highway. If you have a flat tyre and are able to change it safely, change it, if not, wait for help.
Example: Roadside assistance is available 24 hours a day, 7 days a week by every Tata, Maruti, Hyundai and most other car insurance companies in India. Store this number in your cell phone now. It is typically displayed on the insurance policy paperwork or readily obtainable on the insurance provider’s application.
Fuel Types Explained — Petrol, Diesel, CNG and EV
India has four principle fuels on the roads. Knowing the difference will help you to make the right choice when buying a fuel and also will prevent you from making the expensive mistake of putting the wrong fuel in the tank.
- Petrol: Most common. Smooth and refined, suitable for urban driving and small engines. Higher cost per litre but good performance.
- Diesel: More fuel-efficient and more suitable for long highway drives. Increased pulling power (torque). More expensive initial price of car. Applicable for those who drive 2000+ km/month.
- Cheapest to run — CNG (Compressed Natural Gas) around ₹3-4 per km as compared to petrol which is approximately ₹7-9 per km. CNG cylinder takes up part of the boot. Ideal for city drivers with high mileage, such as taxi drivers or commuters.
- Zero emissions: Lowest running cost: ₹1 – 2 per km: Electric (EV). Longer commute (up to 150 km) and at home charging are ideal for the higher up-front cost, with lower cost of ownership over 5 years.
CAUTION: Do not use diesel fuel in a petrol car or petrol fuel in a diesel car. This is misfuelling, and can result in thousands of rupees in damage to the engine. Generally, diesel nozzles should not be installed in petrol car fuel necks, but always check at petrol stations.
Frequently Ask Questions:-
Change mineral oil every 5,000 km. Every 7,500 km for semi-synthetic oil. In the case of fully synthetic oil, replace every 10,000km to 15,000km – always as specified by your car manufacturer in the owner’s manual, which differs depending on the engine.
The Check Engine Light means that there is a problem with the engine or emissions system. If the warning is ignored, a minor sensor problem can become a major — and costly — engine trouble. Have a diagnostic scan performed at a service centre within a few days of light coming up.
Change tyres if there is less than 2 mm of tread left, when there are cracks or bulges on the sidewall, or when the tyre is older than 5-6 years (even if the tread is still good). Rubber wears out over time and is unusable no matter how it looks.
In short term emergencies, two oils in the same grade (e.g., 5W-30 and 5W-30) from different manufacturers can be mixed. However, it isn’t best for long term. Every time, try to use a complete drain and refill using one brand of oil.
Ensure tyres are inflated to the correct pressure. Do not accelerate or brake suddenly. Regularly service the car (have the air filter changed, get the spark plugs changed, change the engine oil). Do not idle for extended periods of time. Take away any heavy load from the boot. Use moderate setting air conditioning.
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