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During the break-in period -

If you've bought a new car, keep your speed under 55 mph (88 km/h) or at the speed recommended by the car's manufacturer for the first 1,000 miles (1,600 km) during the break-in period.

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Avoid heavy loads on the drive train -

Avoid towing trailers and loading the roof rack or trunk with heavy materials, both during and after the break-in period.

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Don't idle your car -

Idling your car for long periods can overheat the engine.

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Consolidate short driving trips -

Most wear and tear happens within the first few minutes of driving your car. Try doing several errands at once during low-traffic hours to prolong the life of your engine.

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Drive carefully -

Taking care not to hit the tire against the curb when parking, avoiding potholes and fast starts, stops, and turns when driving can extend the life of your tires. 

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Shift to neutral at red lights -

Shifting to neutral at red lights puts less strain on your engine and automatic transmission. 

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Purchase gas at reputable service stations -

Some stations don't have pump filters or water down their gasoline and diesel fuel, so it's better to fill up at a reputable service station to avoid damaging your engine with contaminants.

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Wait to fill up if you see a tanker at the gas station -

If you see a tanker at the gas station, come back another day or go to a different location. When filling the underground tanks, the turbulence can stir up sediment in the gas, which can clog fuel filters and cause poor performance in your car.

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Go easy when you're stuck -

If your car is stuck in the mud or snow, don't repeatedly change from forward to reverse and spin the tires at high speeds, as this can damage the transmission or clutch. 

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Have fewer keys on your keychain -

The weight of multiple keys and key chains hanging off your car key while in the ignition can eventually lead to ignition switch failure.

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Choose a good car insurer -

Having a good car insurer means that if you get into an accident, they will pay for parts from the vehicle's manufacturer and guarantee authorized repairs.

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Preserve your car during long-term storage -

If putting your car into storage for a month or longer, fill the gas tank to help prevent condensation from accumulating, wash and wax the exterior to protect the finish, and plug the tailpipe to prevent moist air from rusting it.

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Park in the shade - Parking in the shade minimizes damage to the car's interior from UV sunlight. Using a car shade can further protect your vehicle and help keep it cool on hot days.

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Keep the interior clean -

Dust particles are abrasive and spilled soda can be abrasive, so always thoroughly clean the interior of your car.

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Clean the dash gauge carefully -

Use a soft, damp cloth to lightly clean the plastic that covers the instrument cluster. Too much pressure could cause scratches and make it difficult to read the gauges.

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Use floor mats -

Use floor mats to protect the carpeting in your car. Vacuum or wash as needed, and replace them when they wear through.

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Protect door and window seals -

Apply a rubber protectant on door and window weatherstripping to keep it in good condition. 

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Place a towel under child safety seats -

Protect your car's upholstery by placing a sheet of plastic or absorbent towel under a child's safety seat to absorb any spills or catch any food crumbs.

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Fix small windshield chips -

If you notice a chip or crack in your windshield, take your car to a repair shop. Cracks can spread quickly and limit your ability to see on the road. It also costs far less to repair a chip than your whole windshield.

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Wash your car in the winter -

Slush and ice mixed with road salt will rust your car in the winter. Be sure to rinse the undercarriage, bumpers, and inside the wheel wells during the cooler months. 

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Change engine oil frequently -

Frequently changing engine oil flushes abrasive dirt and metal particles out of the engine, prolonging its life.

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Protect your car's paint job -

Car wax preserves paint by slowing oxidation and forming a barrier against dirt and grime.

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Use wheel cleaner -

Dust can wear away brake pads, so it's important to wash your wheels frequently. Be sure to use the correct formulation of cleaner, as some are designed for metal and others for painted or clear-coated wheels.

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Maintain proper inflation of your tires -

Under-inflated tires create excessive heat and stress that can lead to tire failure. 

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Don't add too much weight to your car roof -

Never exceed your car's roof weight limits, as this will protect against wear and tear on your car. You can find the specifications in the vehicle owner's manual.

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Make touch ups sooner rather than later -

Touch up any nicks to your car's paintwork as soon as possible before rust has a chance to form.

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Protect your car's paintwork from the sun -

The sun's UV rays can break down paint and cause it to fade, so it's best to park your car in a garage or in the shade. If that's not possible, you could purchase a car cover.

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Run the AC in winter -

Run your car's AC a few times during the winter to prevent the moving parts in the compressor from seizing up.

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Check your brake fluid -

Check your brake fluid monthly. If it needs topping up, don't use brake fluid from a previously opened container, as once exposed to air, it absorbs moisture and contaminates easily.

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Check for uneven wear of your tires -

Uneven wear on tires may indicate the need for wheel realignment or improperly operating brakes or shocks.

Sources: (Reader's Digest) (Bankrate)

See also: What to look for when buying a used car

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