[trueblue]

This makes for some very interesting reading.

http://www.mototuneusa.com/break_in_secrets.htm

[attorneyscott]

I used basically the method described. My SA at BMW of Dallas recommended that. I have had no problems at all and my car pulls very hard.

A few years ago I read a comment in Car and Driver by the chief engineer for the Corvette who recommended lots of WOT during break-in "if you want your Corvette to be fast."

[trueblue]

The engine break in procedure listed in the owners manual hasn't changed since the early 1900's. The lubrication technology, engine manufacturing technology, engine material, etc. all have completely changed, but the break in procedure hasn't, kind of strange isn't it.

[LOLrance]

[e90pilot]

Ferrari breaks their cars in using this method right from the factory. All cars come with 50 mi of track break in as well as the first oil change. They're pretty much good to go when you get the keys.

I'm glad I broke my car in this way. It's got 80,000 mi on it now and it burns one qt of oil every 9000 mi (I change it every 5500 now) and it runs just as strong as it did when it was new.

--Marcelo

[lmmo]

Is this applicable to common rail diesel engines like the 320d?

[rdsport323]

that website makes it seem like its really bad for the car if you didn't drive it like you stole it during the break-in. So if I followed the manual and not drove past 4500 rpms or 100mph during the break-in... is my engine screwed now since the rings aren't "sealed" enough?...

[TiAg335i]

Originally Posted by l4wr3nc3

Hahaha..Yeah dude your pretty late to the scene.

[Zeeman]

not familiar with the site...but it sure doesn't look very credible.

[John 070]

Originally Posted by rdsport323

that website makes it seem like its really bad for the car if you didn't drive it like you stole it during the break-in. So if I followed the manual and not drove past 4500 rpms or 100mph during the break-in... is my engine screwed now since the rings aren't "sealed" enough?...

Probably, why should the mfg. know anything about breaking in what they built and continue to build every day for 91 years? I'd go with some link off the web over the owner's manual any day....my owners manual didn't say anything about putting a golf tee in my exhaust. That's how misinformed the mfg. is.

[vAnt826]

Originally Posted by John 070

Probably, why should the mfg. know anything about breaking in what they built and continue to build every day for 91 years? I'd go with some link off the web over the owner's manual any day....my owners manual didn't say anything about putting a golf tee in my exhaust. That's how misinformed the mfg. is.

+2

[ZJP]

My salesman told me not to go above 60mph for the first 1000 miles. Is this bullshit or what?

[e90pilot]

Originally Posted by Tranzporter

My salesman told me not to go above 60mph for the first 1000 miles. Is this bullshit or what?

That is complete crap. The owner's manual doesn't even say that. You're supposed to keep it under 100mph because of the diff. Not sure why but I think it's because of the higher internal friction when it's new.

What this article says is credible. I've asked racing engineers and mechanics about this and they all agree. Now you don't have to abuse it to break it in. Open the throttle all the way but smoothly and shift smoothly too. Like they said, you don't have to exceed 60 to load the rings.

--Marcelo

[.:bHd:.]

From a personal experience.. I've had the same car twice, once i did the slow break in thing and the second time i was WOT half the time. The one with the harder break in is soo much faster now. I'm going to break my cars in hard from now on!

[-=Hot|Ice=-]

Originally Posted by Tranzporter

My salesman told me not to go above 60mph for the first 1000 miles. Is this bullshit or what?

You're not suppose to pass 4,500 RPM or go pass 100 MPH for the first 1200 miles.

[AJerman]

Originally Posted by John 070

Probably, why should the mfg. know anything about breaking in what they built and continue to build every day for 91 years? I'd go with some link off the web over the owner's manual any day....my owners manual didn't say anything about putting a golf tee in my exhaust. That's how misinformed the mfg. is.

Funny that they dyno the cars before you even get them then, huh?

And that so many CAs will tell you that the cars are pre-broken in?

Some people will live their lives following every word that's told to them and never learn for themselves. It's a good thing that EVERY SINGLE THING that a car dealership has EVER said has been truthful, huh?!

[-=Hot|Ice=-]

Originally Posted by AJerman

Funny that they dyno the cars before you even get them then, huh?

And that so many CAs will tell you that the cars are pre-broken in?

Some people will live their lives following every word that's told to them and never learn for themselves. It's a good thing that EVERY SINGLE THING that a car dealership has EVER said has been truthful, huh?!

This is why we call them "The Stealership"

[ZJP]

Originally Posted by e90pilot

That is complete crap. The owner's manual doesn't even say that. You're supposed to keep it under 100mph because of the diff. Not sure why but I think it's because of the higher internal friction when it's new.

Yeah, I found that to be somewhat ridiculous considering 60mph isn't even fast enough to keep up on the highway.

So as long as I'm under 100mph/4500rpm for the first 1200 miles, there shouldn't be problems?

[Spool]

Originally Posted by Tranzporter

My salesman told me not to go above 60mph for the first 1000 miles. Is this bullshit or what?

Your salesman probably say "this is the lowest price i can do for the car"...don't tell me you listened to him too? LOL




I do the hard break-in for all my cars, bikes, jet skis, etc...just rip it...let the RPM sweep...

[Haywire]

either way its not a huge issue... i was told to break in the car keeping it under 120 and the whole 45oo bit, so i did. no big deal. Truth is, i rarely get it over that speed regardless...

if you take it over that speed, go nuts...enjoy yourself, if you want to listen to what the dealer said...do that too.

First thing i did when i got my car is took a road trip and put some serious mileage on the car so it wouldnt really matter either way. Just give it a good rip on a ROADER and I cant see why the car wouldnt get the benefits either which way.

[Furnace]

Okay. I've got two examples.

First:
06 Civic -
Drivin like it's stolen. Great power, good mileage, rev's freely, probably wont last quite as long

06 Civic -
Easy break-in - So So power, great mileage, does not rev as freely ( I really noticed it when I took it on a road trip and was pushing it hard. It felt really rough doing high revs compared to the other one). No where near as quick either.

Second:
05 330CI ZHP -
Drivin like it's stolen. Great power, good mileage, consuming small amounts of oil

05 330 ZHP -
Not quite easy break-in, but not nearly as hard as the first one. Good power, better mileage, consuming no oil.

So, from my limited experience here, I'd say depending on what you're going after (power vs. mileage) you can go either way.
Personally, I'd give up the 1 or 2 drop in mpg for the free reving high power experience of the harder break-in. I probably wouldn't go extremely overboard, but definitely not as easy as 'recommended' in the manual.
How long the engine will last? Well that's still up for debate. Who's to say it wont last just as long.

[vtx DANNY]

shit...is this true? i always thought that cars always have to do the slow break in...