Originally Posted by
Adam-M
I don't get why you wouldn't need to run it in but if you went to a tuner right now to get an engine rebuilt then you'd need to run it in, so are the tuners behind the car manufacturers?
I'd do it out of principle tbh it's not as if your only going to be given the opportunity to drive it for 1000 miles Then hand it back
The running in process is done at the factory after the engine is built. By the time you get the car it's run in and already had an oil change.
Of course there is exceptions to the rule.
I got in my Focus and drove it like I drove any car. Took it in for an oil change at 6250 miles.