|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Why you shouldn't do 15,000 mile oil changes
|
|
07-17-2007, 10:32 AM | #67 | |
Major General
155
Rep 6,158
Posts |
Quote:
what we don't have evidence is that a properly maintained car with factory intervals will sludge up. bottom line is none of this evidence is strong enough to make a case for either side, we have 2 pictures of engines.. not hundreds or thousands it's probably possible for a car with synth oil changed every 3k to sludge up if other malfunctions/conditions were right it's probably also possible for a car to run 20K (5k longer than the interval) and never sludge up at all. |
|
Appreciate
0
|
07-17-2007, 10:34 AM | #68 | |
Lieutenant
5
Rep 513
Posts |
Quote:
Who ya gonna call? MYTHBUSTERS!
__________________
Hunting for an e92.
|
|
Appreciate
0
|
07-17-2007, 11:00 AM | #70 | |
Lieutenant
21
Rep 455
Posts |
Quote:
Ask some of your buds if they go 15k miles on the same oil in there M5s and M3s over there and tell them there babies lol.BMW only cares about us for 50kmiles and then were on are own,sludge and all the engine problems would start right after that point. |
|
Appreciate
0
|
07-17-2007, 01:42 PM | #71 | |
Major
38
Rep 1,238
Posts |
Quote:
http://www.e90post.com/forums/showpo...41&postcount=8 |
|
Appreciate
0
|
07-17-2007, 01:43 PM | #72 | |
Lieutenant Colonel
111
Rep 1,772
Posts |
Quote:
What we really don't have is any one showing up with an engine that has 100K+ miles with oil changes every 15,000 - 20,000 miles saying that their engine is as clean as a whistle... except of course for your single example that could just be the rare person that drives on the highway alot or has a long commute without too much stop and go traffic. |
|
Appreciate
0
|
07-17-2007, 01:44 PM | #73 | |
Lieutenant Colonel
111
Rep 1,772
Posts |
Quote:
|
|
Appreciate
0
|
07-17-2007, 01:48 PM | #74 | |
Major
38
Rep 1,238
Posts |
Quote:
As opposed to you, I do believe BMW is making the correct recommendation on oil change intervals as it doesn't seem to benefit BMW in anyways (in the big picture) by recommending such a 'long' oil change interval. If the current recommended oil change interval is not adequate for sufficient engine protection, then I serious think BMW would never recommend it as it will seriously affect its reputation in the long run due to premature reliability issues with the engine. |
|
Appreciate
0
|
07-17-2007, 01:51 PM | #75 |
Major
38
Rep 1,238
Posts |
Here's the post of E90 quoting BMW literature that it does have a oil quality sensors that feeds data to the ECM of the engine for oil change interval calcuations.
http://www.e90post.com/forums/showpo...9&postcount=16 |
Appreciate
0
|
07-17-2007, 01:53 PM | #76 | |
Thats all you need to know.
43
Rep 1,188
Posts |
I think this post is right on target, plenty-o-assumptions going on to imply the 15k oil change interval has anything to do with this mess.
I had a 528 come in with about 6k on the filter and oil but the owner wanted it changed anyway, I opened the filter housing and the filter paper had completely been destroyed, the paper was in little 1mm chunks and distributed all over the engine. Much of what I found under the V/C was similar to the photos in this post. It was so bad the oil was not draining out of the housing. Quote:
__________________
- M2 2018 LBB / Black
- X5 F15 2016 Mineral White / Black 1981 Delorean number 6489 |
|
Appreciate
0
|
07-17-2007, 01:57 PM | #77 | |
Lieutenant Colonel
111
Rep 1,772
Posts |
Quote:
|
|
Appreciate
0
|
07-17-2007, 01:57 PM | #78 | |
Major
38
Rep 1,238
Posts |
Quote:
|
|
Appreciate
0
|
07-17-2007, 01:59 PM | #79 |
Major
38
Rep 1,238
Posts |
Not 100% sure but notice that your count down only counts down and never counts up? It just counts down slower if the car thinks the oil is still in good condition. Also, the count down also takes fuel consumption, distance travelled, speed, etc in to the calculation formula. It only takes the sensor's info as part of its raw data in achieving the 'next recommended oil change time'.
|
Appreciate
0
|
07-17-2007, 02:19 PM | #80 | |
Lieutenant Colonel
111
Rep 1,772
Posts |
Quote:
New oil doesn't seem to affect the service interval in any way... hence I highly doubt the oil quality sensing has any weight in the service interal calculation if it is occuring at all. |
|
Appreciate
0
|
07-17-2007, 02:21 PM | #81 |
Powered By 36DD
337
Rep 7,369
Posts |
I do my oil change every 5,000 miles and the countdown is not effected by it.....
it still counts down as slow as ever.............
__________________
2006 E90 330i Jet Black | 20" WORK VS-XX | FK452 | H&R Sport on Koni Yellow | REMUS QUAD
|
Appreciate
0
|
07-17-2007, 02:24 PM | #82 |
Lieutenant Colonel
293
Rep 1,515
Posts
Drives: Ever changing fleet
Join Date: May 2007
Location: Alabama
|
Why add unnecessary complexity with "oil quality sensors" when monitoring the fuel economy, which obviously reflects driving habits and engine load, is already there?
__________________
23 iX M60, 24 GT3 RS Weissach, 22 Rivian R1T, 23 RS3, 13 E92 M3 Competition: Akra Evo, KW V3, etc
|
Appreciate
0
|
07-17-2007, 02:30 PM | #83 |
Lieutenant General
3570
Rep 10,351
Posts |
My $.02. BMW began offering extended oil changes beginning with the E46. There are thousands of E46's on the road with over 100k/miles and you don't hear about these engines developing sludge.
FACT: The rest of the car will die before the engine does. Unless you're tracking your car, don't act like a nanny and fret over oil changes. |
Appreciate
0
|
07-17-2007, 02:40 PM | #84 |
Banned
25
Rep 375
Posts |
What if some lazy azz worker that just top the oil off 7 reset the service light?!?
Local news busted a few places for doing it down here i the BayArea. How would we know?! Especially with our E9X......No stick. |
Appreciate
0
|
07-17-2007, 03:38 PM | #85 | |
Lieutenant
67
Rep 527
Posts |
Quote:
And by the way, there are many many more things that can disable a crankcase ventilation system besides being blocked. Many of them won't have any immediate symptoms until it develops enough of a vacuum leak to turn the MIL on, thus the car can go 10-30K miles with no crankcase ventilation system before it gets repaired. It will never hurt anything to change the oil in between the intervals, alot of people like doing it. Just make sure you're using BMW filters (alot of the aftermarket ones are known for coming apart in the housing)and good oil. Me personally, I am leasing my 335i, and it will only get it's oil changed on the recommended service intervals.
__________________
10 AW on fox E90 M3 with 2 pedals, gentleman’s ride
08 AW on fox E92 M3 also 2 pedals, a bit more rowdy |
|
Appreciate
0
|
07-17-2007, 04:33 PM | #86 | |
Lieutenant Colonel
45
Rep 1,738
Posts |
Quote:
__________________
2006 325i - Sparkling Graphite
2000 S2000 - New Formula Red 2007 Chev Silverado crew cab Z71 |
|
Appreciate
0
|
07-17-2007, 08:16 PM | #87 | |
Lieutenant Colonel
111
Rep 1,772
Posts |
Quote:
One thing... when you get your 335i serviced after 15K-20K miles write back here. I guarantee that the words "drives like a champ again," "drives like a BMW again," or "drives like new again" will come out of your mouth... that and "seems much smoother now!" I keep my car in that shape all of the time by changing every 8,000km. |
|
Appreciate
0
|
07-18-2007, 04:26 AM | #88 | |
Major
38
Rep 1,238
Posts |
Quote:
|
|
Appreciate
0
|
Bookmarks |
|
|