That 1% is the exact time it needs to be driven hard though. We agree it's already being done at the end of the assembly line. People that get the new car and grandma the thing around barely exceeding 2,000rpm aren't helping anything. They are only hurting themselves. Manufacturer break in instructions are there for the lawyer's sake. It's about liability. We had the same thing in the powersports industry when I worked there.

The machining tolerances are so much tighter now than they were in the past the large majority of ring break in happens in the first hour of run time.

My 408 was completely sealed up after 3 WOT pulls with decel. I could see the blowby venting from the catch can decrease with each pull. Once the rings are seated break in is over. Parts don't need to wear in like they did in the 60's.

This post was edited by FMX_89 on Sep 11 2016 04:07pm

I just want to point out, there are plenty of people who rarely exceed driving above 4000 rpm.

So yeah, people will "grandma" drive because that's what they normally do.

not everyone is an enthusiast, or in a hurry.

They can drive it off a cliff if they want. That would be improper break in though.

My question to you is what are you protecting by initially limiting rpm? Simple question.

I'm not protecting anything. I didn't abide by the break-in period rules when I bought my brz two years ago, yet I didn't go harsh on it because I wanted to learn the car first (as anyone should).

I also can't answer your question because I simply do not know, which is why I previously stated I didn't want to argue about it.

Like I also said, there is so much conflicting information regarding what to do and what not to do, yet the majority of consumers are most likely going to listen to whatever their dealership said at signing. And to restate, break-in is less relevant today, however it's not difficult to take it easy during the first month of ownership, but I state that more leaning towards the notion of learning you car before you put weight on the pedal.

the only "break in" you need is an early fluid change. Engine, diff, tranny.

We're you afraid the 200 hp was going to get away from you? Haha

You answered the question at hand. There is conflicting information out there because the majority of people will do as they are told because they don't understand. In this case they are given guidelines pushed by liability lawyers protecting a corporation.

Nothing in an engine is designed to have metal to metal contact except the timing gear, rings (only during break in), and valvetrain. Rpm will have little to no impact on those things. It's actually required to get the rings to seat correctly. The cross hatch on the cylinder walls holds oil and forces the rings to spin and the piston moves up and down. If it doesn't spin you get scoring. Higher rpm creates more crankcase pressure which lifts the rings away from the piston and forces them to contact the cylinder wall and wear in.

That's why race engines are put on an engine or chassis dyno and beat within an Inch of their lives as soon as the oil gets up to temp and they are checked for leaks.





Where is the like button?

This post was edited by FMX_89 on Sep 11 2016 06:44pm

What's stupid is your inability to read everything I have stated in this thread to fully comprehend what I'm saying.

Your individual experience really doesn't make a single different compared to hundreds of millions of drivers.


Try harder, peasant.

This post was edited by stupidkid282 on Sep 11 2016 07:53pm

I've never been over 4,000 RPM in my trucks. Is this bad?

Oh... wait. not all motors turn the same rpm. I got your joke. It was a joke right?

I have zero knowledge on trucks so I can rationally bow out of that conversation.



The point is, people who aren't in a hurry, heavy on the pedal, or aren't car enthusiasts, typically won't even see higher rpm bands. My girlfriend is a driver like this. She is aggressive, but doesn't push high rpms. She's one of those people who try to pass on the highway only going a couple miles faster than the person she is trying to pass.

This post was edited by stupidkid282 on Sep 11 2016 08:30pm