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      04-26-2010, 03:34 AM   #1
kpneverdies
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Break-in period

hey there folks, i got a question to ask.
in the driver's manual, it says i can't go up to 106mph and can't pass 5.5k rpm untill 1200 miles, and till i reach 3100 miles, i can't go above 135mph.
Do i really have to wait till 3100miles or 1200 miles is good enough to go full throttle?
My dealer said i gotta wait till 1500 miles...
so.. i don't know who to believe...
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      04-26-2010, 06:33 AM   #2
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wait till you hit 1200 miles before you do go full throttle...you can once in a blue moon go pass 5.5rpm but i recommend to follow the bmw break in rules.
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      04-26-2010, 06:43 AM   #3
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BMW knows best....follow the book and you cant go wrong. Take a road trip, use different gears/RPM range, and get use to your new baby.
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      04-26-2010, 04:10 PM   #4
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set the speed alarm to 105 and try and keep it at least below 6k. finished my breakin in a weekend, just try not to stay in one gear on highway, mixing it up is half the fun, the other is going balls to the wall after break in!!!
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      04-26-2010, 06:32 PM   #5
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If you search around you'll see there are many theories on the best way to do break-in. I won't tell you to drive the car like you stole it from day one, although some will. I'd say honor the owners manual. I haven't heard of warranty work being denied for someone doing 6K rpm within the first 1200 miles but theoretically it's possible. The service department will know your max rpms.

My advice is drive it hard while still staying below 5500 rpm (and no full throttle). Speed up, slow down. Switch gears and speeds. Don't stay at one speed for too long. Only use cruise control to test that it works once within the first 1200 miles. Use engine braking to draw oil up through the engine. And don't forget that its not just the engine that needs to be broken in; the whole drive train does. In fact, a case could be made that the engine has already been broken in by the time you get it. But the tires will need to be scrubbed a bit, the brakes should be bedded in, etc.

After 1200 miles I would bring the max rpms up slowly. Say <6K up to 1500, then <7K up to 1800, and so on.

Congrats and good luck.


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      04-26-2010, 09:02 PM   #6
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You don't have to wait for anything.. Break-in period is just a recommendation, not a requirement.
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      04-26-2010, 09:44 PM   #7
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My take is make sure the engine oil temperature is near nominal before exercising the car enthusiastically.

Vary engine speed (and throttle) as has been mentioned here. For the first several hundred miles or so definitely go easy, the engine will likely be tight (my experience with BMW motors, including M motors, shows you can tell this by the relatively poor gas mileage you might experience). Avoid full throttle and anything over 5,500 rpm.

In fact I think the windshield sticker says "avoid", not "never", that would be ridiculous. I wouldn't sweat it if you popped the 5,500 cherry a few times. I've gone to 6,500 and I'm not going to lose any sleep. Just don't do it over and over. I would follow this recommendation, which is 1,200 miles, not 1,500. However I would not baby the thing either.

I've noted that this motor will generate higher oil temperatures just by driving in S mode in traffic and shifting at 3,000 rpm. Higher than a couple of excursions to 6,500 rpm.

Just drive it reasonably, on occasion with enthusiasm. After that ease up to better adventures, whether you wait until 3,000+ miles I doubt makes any statistical difference.

It is a recommendation or guidance, not a mandate, and no where does it say your warranty is at risk.

I just came back from the 2-Day M School and these engines are not fragile. If they were the hammering we gave them would have ultimately been terminal.

The KEY thing, if nothing else, is be easy on the engine until it is warmed up.
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      04-26-2010, 11:35 PM   #8
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Quote:
Originally Posted by TrackRat View Post
Not according to the car makers.
So show us.... Frankly they should just program a 5500 redline rev limiter into the software for 1500 miles if it indeed is a requirement.

Last edited by EJ_92606; 04-26-2010 at 11:36 PM. Reason: add: rev limiter
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      04-27-2010, 12:35 AM   #9
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Is this break in period necessary for all cars or it's a BMW thing?
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      04-27-2010, 01:33 AM   #10
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1200 miles
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      04-27-2010, 01:49 AM   #11
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106 mph? Never heard that, thought it was only 5.5K rpm??
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      04-27-2010, 03:10 AM   #12
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dood, follow the manual
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      04-27-2010, 05:10 AM   #13
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dood, there's a sticker in the corner of your windshield with all the info in case of short term memory problems.
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      04-27-2010, 06:40 AM   #14
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Has anybody had any issue, regardless of who is "right", from the dealer if the 5500 is shown to have been exceeded? Particularly if there is a warranty issue with the engine?
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      04-27-2010, 07:13 AM   #15
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dealer won't care. I accidentally went to 7k when I wasn't paying attention and when i took it in for service, they didnt' care.
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      04-27-2010, 08:57 AM   #16
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Quote:
Originally Posted by TrackRat View Post
They will care if there is a warranty issue. That is the first thing they check.
They can care all they want and they might give you hard time but in the end absent a clear statement in any document that exceeding what can only be reasonably interpreted as an advisory is insufficient basis to deny warranty coverage. There is no "must not" or "will result in the vehicle's warranty being voided" anywhere. If the engine were that sensitive to damage one could argue that the advisory should not only be stronger but that the rev limiter be lower during the first 1,200 miles.
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      04-27-2010, 09:47 AM   #17
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Quote:
Originally Posted by TrackRat View Post
Abuse most definitely voids the warranty and every new vehicle warranty has this clause. End of discussion. The OM tells you how to break-in the engine. It's your responsibility to follow the instructions. Failure to do so is the owner's problem not the car makers. Net wizdumb doesn't cut it in a court room.
Define "abuse" in this context. The word "abuse" appears nowhere in the OM. The OM says "Please follow the instructions below in order to achieve the optimal service life and economy of operation for your vehicle." We now have a request that applies to all following text including a "do not" statement.

I don't have the warranty book with me but I'm pretty sure that the printed circumstances under which operation can result in a warranty exclusion do NOT include any mention of break in practices. Such clauses usually are limited to modifications, unapproved parts, exportation, and use in racing. Exclusion clauses are almost always very strictly interpreted by the courts when a party relies on them. Any ambiguity is in the other party's favor. Ergo absent an exclusion clause that specifically states operation outside the break in limits is grounds for a warranty denial BMW would have no standing.

Have you heard of someone having a warranty claim denied because they strayed outside the break in "limits"? Abuse would be repeatedly bouncing off the rev limiter with a cold engine. Trips even to red line on occasion? I don't think so.

I would litigate this in court any day. End of discussion.
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      04-27-2010, 10:43 AM   #18
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I've done the hard break-in (run up to the redline and full throttle bursts before the recommended mileage) on six new motors, no issues what so ever.

Of course, I never abuse the new motors, I always fully warm up the oil before I gradually increase the revs....and I avoid all freeway driving so the revs can vary.
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      04-27-2010, 11:09 AM   #19
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the key for break in is to have ups and downs. no cruise control for long periods of time. But chill at 2K then bring it to 5K up and down, up and down. be gentle but still push it.
no full throttle!
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      04-27-2010, 11:37 AM   #20
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Quote:
Originally Posted by TrackRat View Post
Abuse most definitely voids the warranty and every new vehicle warranty has this clause. End of discussion. The OM tells you how to break-in the engine. It's your responsibility to follow the instructions. Failure to do so is the owner's problem not the car makers. Net wizdumb doesn't cut it in a court room.
So they can find out if the vehicle has gone past the recommended RPM range or speed? If so, this should be verified before accepting any new vehicle with more than a few miles on the clock. Last year while test driving a M3 the salesman drove it first and relined it through the gears and we hit well over 105mph. It only had about 12 or 14 miles on it at the time. I knew nothing of the break in period but he had no excuse...!
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      04-27-2010, 11:47 AM   #21
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Quote:
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Has anybody had any issue, regardless of who is "right", from the dealer if the 5500 is shown to have been exceeded? Particularly if there is a warranty issue with the engine?
Unsure the M site but there was a huge fight over an over-rev'd engine that failed during break-in. BMW initially refused to honor the warranty but relented after about a month in the interest of good will. Just a month or so ago.

To the poster that's worried about what may have happened in the few miles before purchase, I understand the car is smarter than that, it knows how when and how often parameters are exceeded.
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      04-27-2010, 12:01 PM   #22
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I think you can do whatever you want with your car. For me, I'll stick to the manual when it comes to my $80,000 investment. I'm no engineer, so I trust the long history of BMW engineering that goes into how a car should be broken in.
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