1. Flush it down the toilet.
   Use it to start a barbeque.
2. Fry food in it.
   Dispose of it in the correct manner at a service station.

Oil can contaminate groundwater and should never be disposed of in the ground, poured in a sewer or flushed away. Many auto parts stores and service stations will accept old oil and dispose of it correctly.

1. The most expensive
   The cheapest
2. The one recommended by the vehicle manufacturer
   None of the above

Check your owner's manual — that will mention which oil viscosity is best for your engine. Remember, depending on the variance in temperatures between winter and summer where you live, the viscosity of oil may change, depending on the season.

1. Fuel filter
   Thermostat
2. Oil sump
   Limited slip differential

If your radiator is not leaking or using water but the car is overheating, check the thermostat next. This regulates when coolant is passed to the engine — basically when it is getting too hot. If the thermostat is broken, it will not perform its task properly.

1. Check that the fan belt is tight.
   Check the transmission fluid level.
2. Put in new spark plugs.
   Ride in first gear.

Any car with a transmission problem should be checked out immediately. The first thing to do is to see if the transmission fluid level is correct. If it is, the problem might be more severe.

1. Crankshaft
   Fan belt
2. Alternator
   Piston pin

A wearing belt, which is generally easy to spot due to fraying, can be replaced fairly simply. That will probably solve your squeaking problem. More often than not it is the fan belt, but check with a mechanic for other possibilities.

1. Valve
   Piston
2. Starter motor
   Oil pan

The primary role of the starter is to turn the engine over, causing it to fire and to run on its own. When the starter motor fails, the engine cannot be started. The starter motor is powered by the car's battery.

1. Brown or black
   Green
2. Blue
   None of the above

Most oil is amber when new, but it will turn brown once cycled through the engine as a lubricant. If you smell the liquid, it should have the distinct smell of oil as well.

1. Coil
   Starter motor
2. Solenoid
   Muffler

The muffler on your car is all about keeping the noise down. The muffler will reflect the sounds created by an engine, which helps cancel them out. Not all sounds are canceled, of course, or we would have silent cars. And no, the muffler certainly is not part of the ignition system of your vehicle.

1. If you have enough gasoline
   Oil level
2. Hydraulic fluid for the gearbox
   None of the above

That light should not be ignored! If it starts to glow, check your oil immediately. If the oil in your engine is too low, it can cause massive damage, as no lubrication is taking place and metal parts will begin to grind on metal parts.

1. Spark plug
   Alternator
2. Air duct
   Radiator

The spark plugs are crucial components in getting any engine to start. The sparks they create cause combustion in the engine, which helps it to run. Engine knocks may indicate worn spark plugs.

1. Timing belt
   Alternator
2. Camshaft
   Glow plugs

Glow plugs are essential parts of a diesel engine. They ensure that ignition will take place during compression, even if the engine is cold. If a glow plug fails, a vehicle may struggle to start.

1. Oil level
   Coolant level
2. Water pump
   It's nothing, don't worry.

A temperature warning light indicates that the engine is overheating. The first thing to check in this regard is the fluid level in the radiator. If that seems fine, you might need to replace the thermostat.

1. The alternator is jammed.
   A piston has seized.
2. The engine is flooded.
   None of the above

A flooded engine simply will not start. This is because the gas/air mixture is too rich — there is too much gasoline for combustion to take place. Open the hood and wait 20 minutes, then try again but do not press the accelerator when starting the car.

1. Oxygen sensor
   Fuel gauge
2. Voltmeter
   None of the above

The condition of a catalytic converter is measured through the quality of the oxygen that comes from it. This is measured by oxygen sensors placed at the front and back of the converter.

1. 2,000 volts
   12.6 volts
2. 9 amps
   10,000 volts

If a battery is in perfect working order, a voltmeter or multimeter should read 12.6 volts or more when connected to it. For an accurate reading, let the car sit for at least an hour — or preferably overnight — before testing.

1. Stop for gas.
   Stop immediately and call a mechanic.
2. Add oil.
   Top off your coolant.

The engine warning light can indicate a small problem or it could indicate a big problem. It's better to get it checked out as soon as possible — especially if the light is flashing.

1. Water pump
   Distributor cap
2. OIl filter
   None of the above

A spark is needed for the engine to turn over, as this helps ignite the fuel/air mixture. With a broken distributor, the spark won't happen. If you're lucky, the cap might not be broken, but it might not be fitted securely.

1. Limited-slip differential
   Long sense distributor
2. Limited sense diaphragm
   Limited starter drive belt

The limited-slip differential usually ensures that power is spread to the wheels of the vehicle equally, whether it is a two-wheel- or four-wheel-drive vehicle. If a wheel loses grip for some reason, however, its spin will be reduced.

1. The muffler is not working.
   It's a problem with the catalytic converter.
2. The seal on the cylinder head is broken, and the gasket may need replacing.
   It's low on gas.

When white smoke comes out of a car's tailpipe, it is an indication that there is a problem with the cylinder head. Either the gasket needs to be replaced, or, worse still, the cylinder head is actually cracked.

1. The fuel/air mixture — the car engine is running too rich.
   The engine is running too cold.
2. The catalytic converter is broken.
   Nothing is wrong.

If your engine is running too rich, too much gas is being pumped into it, and the gas cannot be burned effectively. Not only are you wasting money, but also the engine is not running at the optimal level.

1. Starter motor
   Cambelt
2. Fan
   None of the above

A jammed starter motor can stop a car from starting. Sometimes a light tap with a hammer can unjam it, if you are lucky. Otherwise, the starter motor might need to be replaced. It's time to check with a mechanic.

1. Radiator
   Gas tank
2. Brake fluid reservoir
   None of the above

A leaking radiator is a massive problem. If it's not fixed, coolant levels will drop, your engine will overheat, and it could seize. A quick fix is to use a radiator sealant, but ultimately it will need to be replaced.

1. An oil can with a drop
   + and - inside a rectangle
2. A circle with an exclamation mark
   None of the above

This is the warning indicator that something is wrong with your battery. It could be that it is not charging properly, that one of the cells has died or that the car's alternator is faulty.

1. The gas pedal needs adjustment.
   The carburetor is faulty.
2. The pistons are damaged.
   Try different fuel.

A problem with the fuel/air mixture could cause the engine to run poorly. The carburetor regulates this and should be the first thing you check. Carburetors are not found in modern vehicles.

1. In the trunk
   On the driver's side of the cabin
2. In the glove compartment
   By the emergency brake

All modern cars have a connection port for the onboard computer in the cabin near the driver. Check your car's manual for the exact location, which may be hard to find.

1. Low temperature
   Blocked fuel filter
2. A broken water pump
   None of the above

A clogged fuel filter means that the engine is not receiving fuel correctly, which can cause a misfire. Eventually, the engine may stall, if the problem is not addressed. A new fuel filter is relatively inexpensive.

1. Solenoid
   Crankshaft
2. Rocker arm
   Tappet

Well, it's not always that simple, but the power produced by an engine is turned into movement through the crankshaft and then a whole host of other engine parts. The crankshaft is a great place to start.

1. Oil filter
   Cylinder head
2. Alternator
   Water pump

The alternator helps keep your battery charged. If it is not working, the battery will slowly drain. A dead alternator will eventually mean a car that is going nowhere. Luckily, it is fairly easy to replace.

1. A loose battery terminal
   An oil filter problem
2. A faulty carburetor
   A leaking radiator

If your car started yesterday but doesn't today and you have gas in the tank, the first thing to check is the battery. Begin by checking that the terminals are tight. A loose battery terminal could cause your car not to start.

1. Just attach it. The heat will seal it up.
   Tighten it as much as you can.
2. Only tighten it three quarters of the way to full tightness.
   There is no secret.

Always tighten a new oil filter with just a three-quarter turn. This ensures the new O-ring will make contact and complete the seal. Overtightening the oil filter can strip the threads.

1. Spark plugs
   Fuel filter
2. Oil sump
   Glow plugs

Diesel engines are very different from petrol engines. In a diesel engine, glow plugs heat the motor to help it start. If they are faulty, starting will be difficult or impossible.

1. Turbocharger
   Glow plug
2. Distributor
   High tension leads

The distributor is connected to the coil. It then sends voltage through high-tension leads to the spark plugs so that they fire in the correct sequence to make the engine run smoothly.

1. Spark plugs
   Distributor cap
2. Cambelt
   Fan belt

Fouled up spark plugs will not fire properly. This can certainly lead to your engine misfiring. In fact, it's a good idea to clean them regularly, especially in an older car. And if you ever flood your car while trying to start it, clean the plugs immediately.

1. The gasoline is running out.
   It's on fire.
2. The air filter is dirty.
   None of the above

Black smoke coming out of the rear of the car from the tailpipe could indicate a plethora of problems. The first thing to check is whether the air filter is dirty or clogged. If it isn't, you might need to consult a mechanic.

1. Battery
   Alternator
2. Ignition coil
   Spark plugs

The alternator is an important part of your car's engine. It takes mechanical energy, converts it into electrical energy and then uses that to keep the battery charged. It also powers electrical components within the car, such as power windows.