Subaru Legacy BN/BS (2015-2019) Owners Manual: New vehicle break-in driving - the first 1,000 miles (1,600 km)

The performance and long life of your vehicle are dependent on how you handle and care for your vehicle while it is new.

Follow these instructions during the first 1,000 miles (1,600 km):

•  Do not race the engine. And do not allow engine speed to exceed 4,000 rpm except in an emergency.
•  Do not drive at one constant engine or vehicle speed for a long time, either fast or slow.
•  Avoid starting suddenly and rapid acceleration, except in an emergency.
•  Avoid hard braking, except in an emergency.

The same break-in procedures should be applied to a newly installed or overhauled engine or when brake pads or brake linings are replaced with new ones.