I have always wondered this because there so many different techniques and ideas when it comes to breaking in newly built motors. When a car comes off the assembly line of Honda the motor has ZERO miles on it correct? Then dealerships often have cars that have like <10 miles on them. Therefore when does the motor get "broken in"? Or does it not?

 

bump cause i was wondering the same thing????

 

The base map on the ecus are meant for the engine therefore you don't need to properly break it in?

 

every engine has to be tested before put into the cars there is equipment they use to do this i would assume they are broke in during this testing. They have to be able to pass emissions, hp and torque have to be in a range and the proper af ratios need to be maintained.

 

New cars on the lot are usually not broken in unless they have at least 50 miles. They smoke and are down a few hp with only a few miles on them. I know toyota and nissans are like this.

 

anyone work for a new car dealership?

 

I do thats how I know.