Break in tips:

Be patient

let the engine cool between tanks

Put a few drops of high quality after-run oil before starting it for the first time

Do a few tanks of idle and few more with slow driving (number varies with engines, be on the safer side by doing more )

After break in, take glow plug out and put around 8 drops of after run oil in, then give it a few tugs or if ur using a starter box give it a spin.

hope this helps