I was reading the brochure on the GTR, and it says that they do a engine break-in running the motor for 1 hour to include a continuous 10 minute run at redline before the customer gets the car. This contradicts what their manual says to do with the 370Z. I know they are different cars, but shouldnt all break-ins be done the same?
Ive heard of folks saying that the reason they dont want you to run the car too hard during the 1st 1000 miles or so, is because if anything were to go wrong with the car, it would be in those 1st 1000 miles. And if your running hard and fast, you could get into an accident if any part failed, this would mean a law suit against Nissan.
I do know that your supposed to vary your speed frequently in order to put a load on the cylinder walls so that it breaks-in properly. Holding at one speed for too long creates hot spots in one area and the cylinder wall dont get broken-in properly causing oil consumption and bad compression. I believe the owners manual states not to keep the car at a constant speed during break-in.

This is from the GT-R Owner's Manual. Once again, those who designed, built and tested the engine recommend a strict and conservative break-in period, though this one differs from the 370Z after 600 miles. Disagreeing with the engine designer is a rather fruitless exercise, imo.

BREAK-IN SCHEDULE

NOTICE
Follow these recommendations to obtain maximum engine performance and ensure the future reliability and economy of your new vehicle. Failure to follow these recommendations may result in shortened engine life and reduced engine performance.

Please observe the following types of driving until the mileage shown below has been reached.

Until 300 miles (500 km):
. Do not depress the accelerator pedal more
than halfway and avoid rapid acceleration.
. Drive with the engine speed kept at less
than 3,500 RPM.

300 to 600 miles (500 to 1,000 km)
. Avoid rapid acceleration in a low gear (1st to
3rd gears) with the accelerator pedal fully
depressed. Depress the pedal slowly.

600 to 1,200 miles (1,000 to 2,000 km)
. Drive with the engine speed kept relatively
high. Shifting is recommended between 1st
and 4th gears.

Urban myth...Where does this stuff come from?

Ah yes...The intraweb..:shakes head:

You're going to get different opinions on both sides of the fence. I wouldn't call anyone immature or an idiot for being on either side of that fence either. Some legitimately think that driving your car hard is the best way to break it in, others think that babying it is the best.

Your best bet would be to drive it somewhere in between. Drive responsibly like normal but if you do get into the gas don't panic and freak out about how your engine is going to fail.

LOL! As opposed to NOT shifting between 1st and 4th gears?

Engrish! :icon17:

The salesman I worked with told me Nissan runs the car around their track before it gets shipped off, then the dealerships are suppose to do a run to check the car before they put it up for sale. I doubt they adhear to the break in procedures.

Does that make sense??

I keep on getting passed on the freeway by toyota priuses, that's how strictly i adhere to the 1,200 mile break in period :icon14:

... people... drive your cars like you will drive them everyday... if you are buying a DD... then yes adhere to the manual... if you plan on tracking / racing / weekend cruising your car... then do some research and do what you think is right. Its enough to say that there are just as many people like me who believe the break in should be done with the RPMs all over the place in all gears and there's people who think staying off the gas is the best way to jostle all those iron filings out of their engine. This issue will be beaten to death a million times before you find one way is more correct than the other. there is a reason race cars are broken in on a dyno... I tried my best to copy what they do on the dyno on my local roads.... some people get peace of mind from following that little book...

wait are we talking about christianity or the Z? Lol anyhow - my belief is that both those books need to be taken w/ several grains of salt lol...

Dont you dare steal my line...I'm going to trademark it.

I wasn't worried about the break in period.....I got that thing runnin like mad the next day I bought it! But maybe that's becuz during my test-drive, the salesman told me to gun it..and I did. I new that I was buying it anyway and it is under warranty on top of the platinum warranty I bought ;) I don't adhere to any break in period

Why are you people still posting? :icon08:

Why are you still checking?!!:shakes head:

It keeps popping up under new threads maybe? That's kinda how this works.

hehe..s'all good!