Recent Topics
RAM 1500 3.6l filter
by SavagePatch
02/20/17 11:49 PM
PPHM = thinner but less burn off?
by lukejo
02/20/17 10:54 PM
Replacement Front Struts
by garageman402
02/20/17 10:52 PM
2003 Dodge Caravan with rusty looking coolant
by Oldtom
02/20/17 10:28 PM
Cleaning bronze bore brushes and wire brushes
by Triple_Se7en
02/20/17 09:10 PM
Where can I get oil sample testing done?
by FlyingTexan
02/20/17 08:45 PM
missing/stuck open thermostat?
by RichardS
02/20/17 08:43 PM
Serpentine belt on 2001 Duratec 3.0
by spk2000
02/20/17 08:24 PM
Pick my oil filter
by Mathew_Boss
02/20/17 07:56 PM
Rural King
by roadrunner1
02/20/17 07:50 PM
Using WMC + EyeTV One
by sleddriver
02/20/17 07:44 PM
Oil Change - Lubeguard Flush
by coopns
02/20/17 07:21 PM
Spark Plug of Choice on OPE
by chefwong
02/20/17 06:40 PM
no electric cars, no hydrogen cars, how about air?
by OneEyeJack
02/20/17 06:03 PM
My 1st LML UOA.... need input plz
by 496BB
02/20/17 06:02 PM
Polishing rims?
by Nissan101
02/20/17 05:33 PM
Hot Water Tank - Galvanic Corrosion
by larryinnewyork
02/20/17 05:14 PM
UOA Rotella T6 5W-40 6.0 PSD
by SqFeath
02/20/17 04:00 PM
Replace clutch fork?
by buck91
02/20/17 03:44 PM
Oil for a 2000 Chrysler LHS
by Dumc87
02/20/17 03:40 PM
Newest Members
Jetfccrew, John7109, trentreznor321, DellS, NZwogboy
60591 Registered Users
Who's Online
23 registered (Andyge, Brad_C, c502cid, carviewsonic, CKN, Atesz792, 2 invisible), 826 Guests and 17 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
60591 Members
66 Forums
261344 Topics
4310970 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: 1743
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: 8750
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-NEW
'06 Mazda 3i 2.0L-Pre Owned
'15 Nissan Altima 2.5 SV-CPO
Still looking for a car for my wife(new, used, CPO)

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


Registered: 05/01/12
Posts: 2186
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: 39335
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: 18007
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: 26792
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: 1743
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: 1296
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: 1296
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: 1937
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: 1743
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 Offline


Registered: 10/23/05
Posts: 5920
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 has been performed.

2013 F150 5.0 4x4 60k Schaeffer 9000...Amsoil next

Thick vs Thin test in progress


Top