Recent Topics
Midea US-FC70-DS12DSH (Washer Dryer Combo)
by Swift101
05/23/17 12:56 PM
Racing Oil Question
by Cristobal
05/23/17 11:47 AM
Prius burns oil, how to prevent from happening?
by TheKracken
05/23/17 10:20 AM
Street Performance Brake Pads for Dodge Stealth
by edge10
05/23/17 10:13 AM
RIP Roger Moore
by Blokey
05/23/17 09:10 AM
A win for all us model airplane flyers
by funflyer
05/23/17 09:02 AM
When fate dictates your OCI...
by Alex_V
05/23/17 09:00 AM
Cheap Microfiber Cleaning Cloths
by billt460
05/23/17 08:42 AM
Exhaust leak and mpg
by supton
05/23/17 07:21 AM
TPMS replacement
by supton
05/23/17 07:02 AM
Malicious Website Warning by Anti-virus
by LoneRanger
05/23/17 06:36 AM
How Do I change my user name?
by Cristobal
05/23/17 01:44 AM
Driving with a CVT
by OneEyeJack
05/23/17 01:11 AM
PP 5w30 vs. Synpow 5w30 vs. Napa syn 5w30
by momo
05/23/17 12:43 AM
1988 Cadillac brougham - 307 c.u. - UOA
by momo
05/23/17 12:29 AM
Motor oil for Turbo going uphill
by Carguy21
05/22/17 10:22 PM
92 Chevy C1500 5.0L 240K
by dogememe
05/22/17 09:43 PM
2010 GMC Terrain- oil and fuel dilution
by The_Eric
05/22/17 09:26 PM
Long time lurker. I've searched but need recommendations
by Painkiller7
05/22/17 08:57 PM
entering canada with driving record
by xshoex
05/22/17 08:40 PM
Newest Members
30coupe, Forza, KMP259, svwilbur, motercode
61638 Registered Users
Who's Online
74 registered (2015_PSD, 65convertible, 901Memphis, AEHaas, 4WD, 4 invisible), 2580 Guests and 12 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
61638 Members
66 Forums
265497 Topics
4387305 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: 1753
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: 8915
Loc: Western 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: 2223
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: 39775
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: 18497
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: 27338
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: 1753
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: 1305
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: 1305
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: 2435
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: 1753
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: 6380
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 on Amsoil

Thick vs Thin test: 6k / 43k miles complete


Top