It's not the engine you need to break in. It is the clutch and brakes.

This is so true!

+1. The suspension settles too.

its not jsut test drivers. Workers are known to floor these ***** cause they dont give a ****.

And also they put in regular gas all the times, so its always good to drive off the first tank they give you.

I have never once followed any kind of break-in period for any of my new vehicles and have never had any sort of issue. IMHO I think they are not neccessary.

The best break-in is keeping it at 7500rpm steady for as long as you possibly can at gyrating speeds. over 125mph a serious+ :driving:

Go 4 the gusto bud.:rofl2:

Not only that,maybe inside the factory,the workers already full blast the engine for testing.

Shove some potatoes in the exhaust pipes and rev the car. Don't know what it will do but should be interesting.

Expensive potato gun :owned:

I half way followed the break in period for my automatic 2003 and 2008 Z. Never had a problem. The Infiniti G37 has the same engine. I got down hard shifting it and running it up to almost red line. I smelled something buring so I have not shifted it since. This was done when it only had a few miles on it. So, I am not going to run my new Z up to redline till after the break in period.

You will spend hours reading opinions on this. Most new engines are bench tested from the factory so the initial 'break' in of rings is mostly done given the tighter tolerances of modern manufacturing.

The Nissan recommendation is conservative. Personally I feel the best part of it (and consistent with other manufacturers) is to avoid steady state operations, i.e. cruising at 3K for an hour.

Vary the load on the engine, which implies varying the RPM load. You don't have to bury the throttle to get it above 4K, but IMHO its good to stretch the legs of the RPM range once warmed up. Sure you can get plenty of driving done below 4K but pushing to 4500, 5000, 5500 as you progress in the progress through the break in period is a good thing.

I have only broken in two new cars myself. First was a high performance honda which I did take on the Highway a bit when young. Next was a 2002 WRX that I very much broke in by varying load for 500 miles or so. Honda was sold at 140K, the WRX has 125K and still going. Both barely used any oil between 7500 synthetic changes.

Rest of my cars have been pre-loved so I have absolutely no clue how they were used. 2010 Z and the 06 Cayman.

We drive both of them with gusto. :)

- b

Sounds good. Thanks for all the input