john-e89 said:PerryGunn said:Precisely, and suppose someone had their running-in service done at 250 miles or 300 miles because they were going on a long trip.... is that worse than having it done at 1500 miles or 1800 miles?Yorkie Z said:So if it had the service at 1199 then that's brilliant. If it was serviced at 1201 you wouldn't touch it with a barge pole!!!
What if the car was serviced at 1150 miles but it was driven by some spoilt rich kid who couldn't give a flying f**k about the 3000rpm limit? I totally agree that correct servicing is important, but it all has +/-tolerance. Perfect history does not make a prefect car.
If manufacturers quote 1200 miles, you can be sure that they've allowed a very wide margin for error and someone who's done, say, 2,000 miles before the running-in service will not have done irreparable harm to their engine...
Have to agree with this. What's your acceptance mileage of failure anyway? Is it ok it pops at 80k, 120k 150k? Are all the engines built to exactly the same tolerances no matter how tiny? I would think a slight difference on build would make more difference than another 1k on a running in service.
Bottom line is if it sounds ok, isn't blowing smoke and has a good service record even with the odd discrepancy then that is all you can hope for. As said there's no way of knowing how the cars been treated from new.
Just imo.
VRSteve said:tomscott said:So basically if you run the car for longer than 1200 miles, you WEAR THE ENGINE EXCELSSIVELY and the engine "ages" prematurely.
The engine is most vulnerable when new and "as they get higher milage" is all well and good but once they get to 60-70k you may find the engine may be worse with bore scoring etc and essentially the likelihood of a failure is higher. 12k+ for a new engine and labour... just saying
I wouldn't touch one with a bargepole.
"EXCELSSIVELY".....wtf does that mean.
I think it was you who decided a car that had the running in service at 1400 miles wasn't worth buying.
What evidence do you have for the above statement, or are you just spreading misinformation on the back of your own assumptions??
VRSteve said:john-e89 said:PerryGunn said:Precisely, and suppose someone had their running-in service done at 250 miles or 300 miles because they were going on a long trip.... is that worse than having it done at 1500 miles or 1800 miles?
If manufacturers quote 1200 miles, you can be sure that they've allowed a very wide margin for error and someone who's done, say, 2,000 miles before the running-in service will not have done irreparable harm to their engine...
Have to agree with this. What's your acceptance mileage of failure anyway? Is it ok it pops at 80k, 120k 150k? Are all the engines built to exactly the same tolerances no matter how tiny? I would think a slight difference on build would make more difference than another 1k on a running in service.
Bottom line is if it sounds ok, isn't blowing smoke and has a good service record even with the odd discrepancy then that is all you can hope for. As said there's no way of knowing how the cars been treated from new.
Just imo.
This is absolutely my point.
To dismiss a car because the running in service was at 1400 miles is stupid in the extreme. Its probably had no bearing on the engines health and how many other variables can you find that will impact the longevity of the engine but you will never know about.
Ultimately if its done within the BMW tolerance of 1200 +/- 600 then its not an issue.
Sad thing is, and I've said this before, certain idiots spread this misinformation and it makes newcomers very very wary of these cars for no good reason. Its all well and good on a Porsche forum where we all know the engines aren't built properly, but in comparison the S54 is a very reliable old lump.
Babw said:Also random engines are picked from the factory and run on an engine dyno to pretty much full engine speed but not for enough time to cause full thermal expansion so something like 1/5 M engines will have been ragged before you've even driven your new M car :wink:
mr wilks said:Babw said:Also random engines are picked from the factory and run on an engine dyno to pretty much full engine speed but not for enough time to cause full thermal expansion so something like 1/5 M engines will have been ragged before you've even driven your new M car :wink:
Ooooooh fastforward to forum ///Meltdown![]()
Wormcan well & truly blown open![]()
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Babw said:Well that was a good laugh for a Monday evening. Forum hyperbole and conjecture at it's best.
I went down to the M factory a couple of years ago with a friend who has a big composite technology firm and he had a meeting with some of the bosses etc. I wondered around asked some of the engineers this exact question having owned a few M cars in the family some from new.
They leave the factory with fully synthetic oil. Not Joe Gibbs running oil, mineral oil etc. The M engines are hand assembled but factory line built. These are not 50k honed bore blueprinted engines as much as the die hard M fans would like to think.
The reason they ask for a 1200 mile running in is because they know a lot of users won't follow the instructions of varying engine speeds, not accelerating harshly etc during the running in period. This causes heat build up and although the tolerances are pretty good as most factory built engines are these days there may still be expansion causing increased wear in the early periods. The 1200 mile service is purely precautionary due to the lowest common denominator who won't follow the guidelines. If you follow the guidelines and the engine beds in well there is no need for an oil change but for the manufacturer it's simple precautionary guidance.
Also random engines are picked from the factory and run on an engine dyno to pretty much full engine speed but not for enough time to cause full thermal expansion so something like 1/5 M engines will have been ragged before you've even driven your new M car :wink:
ocrx8 said:Just checked mine - it was done at 1,172 miles, phew! I can now sleep soundly.
ocrx8 said:Just checked mine - it was done at 1,172 miles, phew! I can now sleep soundly.
Babw said:They leave the factory with fully synthetic oil. Not Joe Gibbs running oil, mineral oil etc.
The reason they ask for a 1200 mile running in is because they know a lot of users won't follow the instructions of varying engine speeds, not accelerating harshly etc during the running in period. This causes heat build up and although the tolerances are pretty good as most factory built engines are these days there may still be expansion causing increased wear in the early periods. The 1200 mile service is purely precautionary due to the lowest common denominator who won't follow the guidelines. If you follow the guidelines and the engine beds in well there is no need for an oil change but for the manufacturer it's simple precautionary guidance.
tomscott said:VRSteve said:john-e89 said:Have to agree with this. What's your acceptance mileage of failure anyway? Is it ok it pops at 80k, 120k 150k? Are all the engines built to exactly the same tolerances no matter how tiny? I would think a slight difference on build would make more difference than another 1k on a running in service.
Bottom line is if it sounds ok, isn't blowing smoke and has a good service record even with the odd discrepancy then that is all you can hope for. As said there's no way of knowing how the cars been treated from new.
Just imo.
This is absolutely my point.
To dismiss a car because the running in service was at 1400 miles is stupid in the extreme. Its probably had no bearing on the engines health and how many other variables can you find that will impact the longevity of the engine but you will never know about.
Ultimately if its done within the BMW tolerance of 1200 +/- 600 then its not an issue.
Sad thing is, and I've said this before, certain idiots spread this misinformation and it makes newcomers very very wary of these cars for no good reason. Its all well and good on a Porsche forum where we all know the engines aren't built properly, but in comparison the S54 is a very reliable old lump.
Yes I am an idiot and have no idea![]()
Im sure your contributions across the forum are very astute.
breezer said:This has been fun.
One question - why is it desirable to have BMW as a first owner? To me that says press car or demonstrator...and I don't know about you, but would you want a car driven sideways on the redline from cold by journos? As for demonstrators, I'm yet to find a salesman who tells me to be more careful and have had many egg me on from cold.
I wouldn't... e's a lyin' barsteward...ya can't believe a word 'e says guv :wink:paulgs1000 said:Another interesting point here . . . . all very worrying. I guess I'll go back and read what Perry said . . . .![]()
Babw said:I think the point with the bedding in/running in service is that doing it after 1200 mile of bedding in is what BMW advice, however just because the car has done 1200 miles doesn't mean it's been bedded in. I'm sure some overly protective owners may have driven 1200 miles without ever actually bedding in the engine, never getting adequate thermal expansion and the wear needed to mate the surface adequately.
They then go ahead have the oil change and drive significantly harder when the engine actually beds in which might lead to contaminated oil and they won't get this changed for another 1/2 years. I look at cars that have had the running in service at 800 miles and think was that actually enough mileage to run it in?