Do you need to break in a new car?

For decades, car manufacturers recommended that drivers break in a new car before pushing it to its limits. Here’s what you should know.

The reason
A break-in period ensures that the moving parts of a car wear down smoothly, thereby reducing the amount of friction between components. It gives the engine, transmission, shocks, brakes, and tires time to work out any imperfections. This process increases the efficiency, durability, and longevity of the vehicle.

The duration
The break-in period is measured in distance rather than time. Each car manufacturer has its own recommended distance, which can be as much as 3,000 miles. However, it’s generally agreed that the first 600 miles are the most important.

The process
Breaking in a car involves adapting the way you drive to avoid overworking the engine and other moving parts. Here’s what’s recommended:

• Don’t push the engine above 3,000 revolutions per minute

• Alternate between accelerating, slowing down, braking and shifting gears on a quiet road

• Avoid abruptly accelerating and braking

• If it’s a manual transmission, shift gears carefully without forcing the gearshift

• Let the engine idle for a few minutes before driving, particularly in cold weather

• Don’t use the vehicle to tow anything

A break-in period is also beneficial after you’ve had one or more moving components of your car replaced. This will help ensure the new parts wear evenly and work optimally.