Break in tips:
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