Hi ,I have approx. 1500kms on rebuilt motor ,how long should I wait to start using synthetic oil? Thanks for any insight.

 

Honestly I would go a while no sense in rushing it, it is not like dino is harmful or anything. Not that I really think switching to synthetic at 2K would hurt anything either just figure better to be absolutely sure the rings are seated and you afre completely past all the shot oil changes one should do after an engine build.