in the factory they run the engines and make sure they are running well. they will drive it around in like a test run lane make sure everything is working fine..
when you have a new car freshly built the engine will need time to break in and let the seals set and the internals wear right due to the engine is now having to push more load internal tranny/rear diff/the load of the car due to day to day driving...plus they full tank your car. kind of wish they didnt do that to mine i wanted half tank to keep the load light as possible..
its like buying a new baseball gloves they work better once its been broken in..
a good break in will make a engine very happy and last a very long time..
my break in was 1500k then i flushed the oils to make sure i get all that break in gunk out.. then i was having fun
its better to be safe then sorry your engine is not running well.. dont go bananas when you get your car the first day.. i know its tempting but treat her right she will reward you with a good strong running engine.
its similar to a rc nitro car.. i use to race them.. didnt do my break in and the engine didnt last and blew up on me
