Recent Topics
3M Foaming Salt Remover
by SatinSilver
10/20/17 12:11 PM
OBDII Scanner-You get this in your message box?
by ARCOgraphite
10/20/17 11:43 AM
AMSOIL 15W-40 HD Diesel and Marine Oil shelf life
by alleghenyrose
10/20/17 11:28 AM
what happens to a car after we sell it?
by jstert
10/20/17 10:53 AM
Europe, Asia, Australia/NZ members- Schaeffer Oil
by Kuato
10/20/17 10:29 AM
Replacing Bump stops - why?
by LeakySeals
10/20/17 10:12 AM
Christmas shopping days to go
by CourierDriver
10/20/17 08:50 AM
Extended Oil Change ?
by yankees1
10/20/17 08:31 AM
Oil choice for S350d
by bigjl
10/20/17 06:45 AM
Mobil1 0w20 EP, 9924 miles, 2010 Civic
by Astro_Guy
10/20/17 06:22 AM
Edge 10W30, Penrite HPR 5, MaxLife 20W50 in Aust.
by SR5
10/20/17 04:23 AM
That's all folks....last Aussie car produced today
by Shannow
10/20/17 02:41 AM
Under valve cover pics
by barkingspider
10/20/17 01:50 AM
Simple Tire. Are they good?
by WhyMe
10/20/17 12:59 AM
Fuel injected Toyotas
by OneEyeJack
10/20/17 12:12 AM
Opinions on Engine Flushes?
by DimondPhilup
10/20/17 12:10 AM
How quickly will liquids in the coolant system mix
by TheMidnightNarwh
10/19/17 11:56 PM
Toyota 2.5l oil filter tool?
by RDC
10/19/17 10:25 PM
2008 Duramax LMM Amsoil Premium Diesel Oil 5W40
by Toptierpao
10/19/17 09:20 PM
Nexus 7 Q
by sleddriver
10/19/17 08:35 PM
Newest Members
RaisinCane, thkilroy, perknz, JEByrd, theJackpile
63171 Registered Users
Who's Online
84 registered (AdamZ, Alex_V, 69GTX, 14Accent, AandPDan, 11 invisible), 2167 Guests and 26 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
63171 Members
66 Forums
272515 Topics
4524269 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#3213112 - 12/11/13 07:16 AM ~6500 miles acoustics of engine change.
BMWTurboDzl Offline


Registered: 04/15/10
Posts: 1823
Loc: Atlanta,GA
Happens like clockwork. At this mileage there's a noticeable acoustic change at idle and low rpm. It goes from butter quiet to more metallic. Is this mileage at the point where a particular additive takes over/stops working?

Factory OCI is ~13k miles. Oil is Castrol OE 5w30 LL04.
_________________________
'15 435i - BMW branded Shell 5w30.
Prev
'10 335d
'06 330i
'03 330i

Top
#3213119 - 12/11/13 07:31 AM Re: ~6500 miles acoustics of engine change. [Re: BMWTurboDzl]
Char Baby Offline


Registered: 05/25/05
Posts: 9140
Loc: ROCHESTER, NY
I've noticed similar sounds/harmonics toward the end of, what I call my normal OCI's(~5K miles). Smooth/quiet when the OCI is new, to some mild valve train noise(s) at the typical OCI change.

Though, I wouldn't call it noises in my engines, just more audiable!
_________________________
"Retired"
'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'06 Mazda 3i 2.0L
'15 Nissan Altima 2.5 SV

Top
#3213124 - 12/11/13 07:35 AM Re: ~6500 miles acoustics of engine change. [Re: BMWTurboDzl]
Phishin Offline


Registered: 05/01/12
Posts: 2287
Loc: Indiana
I couldn't do it. I couldn't do 13K mile OCI's in such a nice car. Why? To save a few bucks? Not when the oil is obviously out of grade...causing your changes in engine accoustics.

Have you done any UOA's on this car?

My bet is the oil is out of grade. I bet if you drained 2 quarts out and replaced with 2 quarts of 5w40, it would sound nice and quiet again.

The noise is telling you something: the oil is out of grade (too thin). If you want to run 13k OCI's....then use a thicker oil so it will shear into grade, rather than using 5w30 and having it shear out of grade. Run a good 5w40 or even 5w50 (which are usually on the thin side of a 50 weight).


Edited by Phishin (12/11/13 07:37 AM)
_________________________
2010 Accord-LX K24: PU 5w30
2014 CR-V LX K24: TBD
1990 Chevy K1500 350TBI: Frankenbrew
2008 Ruckus 50ccGET: M1R Mix

Top
#3213126 - 12/11/13 07:36 AM Re: ~6500 miles acoustics of engine change. [Re: BMWTurboDzl]
JHZR2 Offline



Registered: 12/14/02
Posts: 40406
Loc: New Jersey
I'd like to see a UOA to identify if it is possibly a viscosity and/or fuel related issue.

Top
#3213136 - 12/11/13 07:39 AM Re: ~6500 miles acoustics of engine change. [Re: BMWTurboDzl]
Donald Offline


Registered: 03/21/04
Posts: 19324
Loc: Upstate NY
I would say its more to a change in viscosity due to oxidation or shearing.
_________________________
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)


Top
#3213144 - 12/11/13 07:55 AM Re: ~6500 miles acoustics of engine change. [Re: BMWTurboDzl]
demarpaint Offline


Registered: 07/03/05
Posts: 28292
Loc: NY
Another vote for the oil going out of grade, and has probably been in service a little too long. Either do a UOA and see what's going on, or shorten your OCI to the point just before the acoustics change.
_________________________
God Bless Our Troops


Top
#3213163 - 12/11/13 08:20 AM Re: ~6500 miles acoustics of engine change. [Re: BMWTurboDzl]
BMWTurboDzl Offline


Registered: 04/15/10
Posts: 1823
Loc: Atlanta,GA
Update: The factory OCI is an approximate and was for reference purposes but regarding UOA the few out there show that BMW is about spot on. It's ready to be changed for sure at 10-13k miles.

Coincidentally I was planning to change this weekend. I like the mid cycle OCI but was curious if there is a chemistry change that is neither for the better or worse with 6500 miles on the oil.

Boundary layer re-applied at this mileage?

Remember this oil is 229.51/LL04 and I'm burning ULSD.

I'm at 56k miles and haven't done anything more than a factory fill UOA. I went full OCI once.


Edited by BMWTurboDzl (12/11/13 08:26 AM)
_________________________
'15 435i - BMW branded Shell 5w30.
Prev
'10 335d
'06 330i
'03 330i

Top
#3213415 - 12/11/13 12:46 PM Re: ~6500 miles acoustics of engine change. [Re: BMWTurboDzl]
JR Offline


Registered: 08/08/04
Posts: 1311
Loc: Michigan born but my heart bel...
Run full oci. my vw called for 7.5-10k oci's and that was in 1984 with dino oil. ran strong 6yrs ago at 380k and still going strong at over 400k.

ken
_________________________
97 F250HD 7.3 320K 01 Astro 220K
93 metroXFi 94.5K
01 Impala 300K
04 RTV900R 1150hrs



Top
#3213418 - 12/11/13 12:48 PM Re: ~6500 miles acoustics of engine change. [Re: BMWTurboDzl]
JR Offline


Registered: 08/08/04
Posts: 1311
Loc: Michigan born but my heart bel...
Diesel put soot in oil so i wouldn't think the oil is thinning out. soot loading causes oil to thicken up.

Ken
_________________________
97 F250HD 7.3 320K 01 Astro 220K
93 metroXFi 94.5K
01 Impala 300K
04 RTV900R 1150hrs



Top
#3215102 - 12/13/13 01:36 AM Re: ~6500 miles acoustics of engine change. [Re: BMWTurboDzl]
Ducked Offline


Registered: 10/25/12
Posts: 2990
Loc: Taiwan
Any objective evidence for the change?

I'm not implying that a subjective assessment is necessarily wrong, just wondering if analysis of a sound recording would yield hard evidence.

Could be a whole new field of obsession. grin

Top
#3215285 - 12/13/13 08:30 AM Re: ~6500 miles acoustics of engine change. [Re: Ducked]
BMWTurboDzl Offline


Registered: 04/15/10
Posts: 1823
Loc: Atlanta,GA
Originally Posted By: Ducked
Any objective evidence for the change?

I'm not implying that a subjective assessment is necessarily wrong, just wondering if analysis of a sound recording would yield hard evidence.

Could be a whole new field of obsession. grin


Hehe...probably would, but it would be hard for the lay person to get the variables right. It's a slight change in sound. Doesn't go from quiet to hearing valves tapping.

We hear about oils cleaning and re-applying boundary layers so I was wondering if it was at this mileage that my oil started to do it.
_________________________
'15 435i - BMW branded Shell 5w30.
Prev
'10 335d
'06 330i
'03 330i

Top
#3275089 - 02/08/14 05:20 PM Re: ~6500 miles acoustics of engine change. [Re: BMWTurboDzl]
outdoorsman310 Offline


Registered: 08/26/13
Posts: 113
Loc: DE
I would change the oil. I see no reason to go that long on an oil change. oil is cheap. engines are not

Top
#3366169 - 05/08/14 11:21 PM Re: ~6500 miles acoustics of engine change. [Re: JHZR2]
Kuato Online   confused


Registered: 10/23/05
Posts: 6936
Loc: Colorado
Originally Posted By: JHZR2
I'd like to see a UOA to identify if it is possibly a viscosity and/or fuel related issue.


This. I'd be changing and checking it the moment the noises changed.
_________________________
Oil condition is speculation until a UOA is performed.

2013 F150 5.0 4x4 SuperCab 63k Amsoil/Amsoil

Thick vs Thin test: 11k / 43k miles complete

Top