Breaking in a new engine - important? - Nissan Murano Forum
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post #1 of 11 Old 01-30-2008, 12:39 PM Thread Starter
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Breaking in a new engine - important?

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post #2 of 11 Old 01-30-2008, 12:51 PM
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I would go gentle on the engine for the first few hundred miles. I don't consider it to be too much of a chore - what's a weeks worth of gentle driving for many years worth of reliability?




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post #3 of 11 Old 01-30-2008, 01:08 PM
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Cryogenix-

I have heard many arguments both for and against a break-in period. Some make sense while others are ridiculous sounding. For example, do you really believe "Most modern car engines are broken in at the factory, before assembly" is true? Do you think there is a warehouse somewhere in Japan with several thousand VQ engines running in test stands being broken-in? Doubtful.

Every gear-head has an opinion on this topic. I choose to side with the experts, the guys who engineer and oversee this particular engine - the Nissan engineers. If they recommend you should respect a 1,200-mile break-in period, then who am I to argue?

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post #4 of 11 Old 01-30-2008, 01:50 PM
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I think one thing you need to remember is that the "break-in period" is not solely for the engine. It is also for all of the other components including the transmission, brakes, alternator, fuel and steering pumps, ac compressor, and many others. The break-in period does not appear to be all that conservative when you consider this?

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post #5 of 11 Old 01-30-2008, 04:30 PM
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I use to be an aircraft mechanic, now THAT is engine you want to be careful with!

My breakins are pretty straightforward, change the oil and filter after 200 km, then again at 500, then you are good until the regular oil changes ( I change at 5k), overkil? Yep but oil is cheap and it's not a big deal to do. No synthetics until you are over 10k, but 20k is probably ideal.

Drive normally for the first 500km, vary the speed often, no flooring of it until you are over 200km either and then it should be short until you get to 500km or over. You should be good!
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post #6 of 11 Old 01-30-2008, 06:43 PM
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No hitting the brakes hard for the first few hundred miles.......unless you have to. Bakes need to have a chance to seat.


The other thinkg you can do is believe the naysayers and don't break the car in as the manufacturer tells you to.
Everything will be alright.

Of course the car may develop problems later.
You know. The front end wobbles when you hit the brakes because the rotors are warped.. The car burns oil, etc, etc.
But then you knew it was a POS anyway, right?

Why are we having this discussion?
Why do people go out of their way not to follow the advice of the Manufacturer?
Don't people have parents anymore?
No one was ever told by their folks to be safe rather than sorry?


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post #7 of 11 Old 01-30-2008, 07:33 PM
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Quote:
Originally posted by Cryogenix


You ARE a Murano owner, correct? Nuff said.

My question was merely to address what I'm sure is the norm with new car owners, and that's the majority have no clue about engine break-in, and those that heard about it probably gave up almost immediately, unless they were mechanically inclined. My sisters, mothers, brothers, uncles, grandparents, etc, just buy a new car and drive it normally, and they've had engines last +100,000mi. So, it leads me to believe that SOME break-in at the factory may have been done, in anticipation of all the auto dummies out there. Either that, or the whole process is really unnecessary.
If you are so unconvinced by the need for a break-in period, why not just do what your relatives do and drive the car with the anticipation of +100,000 miles?

The way I see it, it cannot hurt the engine to go gentle for a little while. But the manufacturer seems to suggest that you can damage the engine if you do not do a break-in period.




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Lots of squeaks and rattles.
R.I.P. 10/15/2015 CVT failure.
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post #8 of 11 Old 01-30-2008, 07:34 PM
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They (Nissan) don't recommend synthetic either.....

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post #9 of 11 Old 01-30-2008, 07:42 PM
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Quote:
Originally posted by Cryogenix
...the majority have no clue about engine break-in, and those that heard about it probably gave up almost immediately, unless they were mechanically inclined.
I do not believe that is a valid statement.

With every new car I purchased, the dealer went over the break-in requirements with me. I am sure most salesmen do the same with their customers.

I would suspect that most responsible adults, especially those who have paid for their new cars with hard-earned cash, are well aware of the break-in requirements and will do their best to abide by them.

Of course there are exceptions to every rule. I can see some 16 or 17 year-old who gets a new car for his birthday doing everything contrary to the break-in requirements.


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post #10 of 11 Old 01-31-2008, 07:25 AM
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I think you may have something there Cryo.

And, there is a place where they DO break in every single new engine: Caterpillar. I remember seeing a picture of row upon row of diesel engines with their headers a high orange color in the break-in booth at Caterpillar. It was amazing.

I do think that being gentle for everything is a good idea the first few hundred miles.

But, I do also feel that modern engines are straighter than the old V8's we were used to from the 60's and 70's, especially the Japanese engines; hence their longevity. Every once in a while you ran into a really straight V8 engine back then -- and they lasted more than 300k miles -- which was exceedingly rare, not so for modern Japanese engines, it's more of a norm.

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post #11 of 11 Old 02-01-2008, 07:36 AM
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Most break in's are moot anyways because most people just putt-putt around town which is perfect for break in's, no high speed, (maybe occasionally on the expressways), varying speeds etc. Driving normally should be fine for the majority. Crucial is the first 500k, that's when 90% of the wear will happen, after that, with today's engines you should be fine.

Just remember the oil changes, at least one at 500k max!!!
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