Some say it's no longer needed, others say it's a must. As is usually the case with such subjects the answer lies somewhere in between.
It's not so long ago that it was necessary to carefully run-in a new engine, to ignore it was to risk major engine damage.
Today, with the improvements in the materials used in engines and the oils that keep it lubricated it's not needed as such.
While it's no longer necessary to carry out a strict run-in routine as once was the case it is still necessary be careful not to abuse the engine during the first 1000 km or so.
By taking care not to over- stress the engine early in its life you are likely to extend the life of the engine, and get the most out of it in terms of performance and fuel economy.
Some steps you can take to ensure your engine is run-in:
. Don't rev the engine too high.
. Try to keep the engine speed between 2000 rpm and 4000 rpm.
. Don't sit on a steady speed for too long, vary it.
. Don't let the engine sit idling for more than a couple of minutes at a time.
. Don't tow a trailer.