Bedding in rings - recommended option?

[natho]

most manufacturers run their engines in on an engine dyno before they even see a car... from memory mitsubishi here in adelaide run it for almost 20 minutes at varying load/rpm points and then give it a few runs the redline. this is purely because people don't expect to have to treat the car specially when its new to run it in.

thats probably why they can specify synthetic straight away - while the motor may not be 100% run in, the vast majority of the running in process should be done by the time you get the car.

[BBQ]

We are in the middle of running in a freshly re-built motor now, And from what we know the first 500k’s is with running-in oil and then change it to synthetic from their on.

We have just clocked 680km and done an oil chance with synthetic and you notice the car running lots smoother straight away with the new oil, compared to the running in stuff.

Haven’t had any problems with compression or loss of oil. Everything seems to be running ok.