Originally Posted by jon@work

People tend to have slightly differing views on this.

When I run my new engine in, I'll be using 5 odd litres of Tesco's oil at 97p per litre, running a pipe directly from the turbo compressor housing to a weak actuator (with only half a hole of preload) to restrict the boost to about 7-8psi, and keeping the revs quite low for the first 100 odd miles (about 3-4k rpm max) not letting the engine work too hard in too low a gear. Let the engine warm up and cool down properly.I'll be doing this, building the revs up, for 800-1000 miles. If you treat the engine too easily, the bores won't wear in.

This method has worked for me on previous cossie builds, so is what I'll be doing again. If anyone elses opinion differs, that's OK - but the method outlined above will do me.