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Does adding oil mid-interval extend the change? #4780372
06/07/18 04:20 PM
06/07/18 04:20 PM
Joined: Jun 2014
Posts: 112
NJ, USA
gtmaster303 Offline OP
gtmaster303  Offline OP
Joined: Jun 2014
Posts: 112
NJ, USA
Exactly what the title says. My BMW Burns a quart in between it's 15k intervals. Does that mean I can go longer because fresh oil is added?


2012 BMW 528i xDrive
2010 Porsche Cayenne 3.6
Re: Does adding oil mid-interval extend the change? [Re: gtmaster303] #4780382
06/07/18 04:24 PM
06/07/18 04:24 PM
Joined: Mar 2014
Posts: 3,424
NJ
Leo99 Online content
Leo99  Online Content
Joined: Mar 2014
Posts: 3,424
NJ
I wouldn't go longer than 15k miles intervals. I'd assume BMW already assumes you'll be adding make up oil.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 370,000 miles
2015 Camry 70,000 miles
Re: Does adding oil mid-interval extend the change? [Re: gtmaster303] #4780383
06/07/18 04:25 PM
06/07/18 04:25 PM
Joined: Sep 2012
Posts: 2,221
London, England
bigjl Offline
bigjl  Offline
Joined: Sep 2012
Posts: 2,221
London, England
It probably does.

But I would not do a 15k mile oil change in a BMW.

More than a few BMW engines have serious issues amd I think over long OCI is part of the problem.


16 S350d LWB 25k Mobil Super 3000 XE 5w30
17 Smart ForFour Auto 6.5k Mobil 1 0w40 FS
Re: Does adding oil mid-interval extend the change? [Re: gtmaster303] #4780386
06/07/18 04:28 PM
06/07/18 04:28 PM
Joined: May 2012
Posts: 1,401
Georgia
AVB Offline
AVB  Offline
Joined: May 2012
Posts: 1,401
Georgia
I wouldn't. I had to cut back my Grandma's oci to 10k because of varnish causing problems with the VANOS solenoid on her 325.

Re: Does adding oil mid-interval extend the change? [Re: Leo99] #4780387
06/07/18 04:28 PM
06/07/18 04:28 PM
Joined: Jan 2013
Posts: 1,391
America's Dairyland
LotI Offline
LotI  Offline
Joined: Jan 2013
Posts: 1,391
America's Dairyland
Originally Posted By: Leo99
I wouldn't go longer than 15k miles intervals. I'd assume BMW already assumes you'll be adding make up oil.


This


03 Honda Interceptor
11 Kawasaki KLR 650
12 Ford E450
17 VW GTI
[IMG]http://badges.fuelly.com/images/sig-us/803455.png[/IMG]
Re: Does adding oil mid-interval extend the change? [Re: gtmaster303] #4780395
06/07/18 04:37 PM
06/07/18 04:37 PM
Joined: Jun 2016
Posts: 3,487
MN
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 3,487
MN
Originally Posted By: gtmaster303
Exactly what the title says. My BMW Burns a quart in between it's 15k intervals. Does that mean I can go longer because fresh oil is added?
If its only 1 quart, thats not much. No extension. Now, if you were putting in 3 quarts, then 18k wouldn't be out of the question in my opinion. Adding oil does replenish detergents, anti-oxidants, ZDDP, dispersants, etc., so yeah. Its a matter of how much.
As it is, I think BMW did make a change in what it recommends. https://f30.bimmerpost.com/forums/showthread.php?t=868291
and they went to 10k miles (oops moment for them...). Reputation for too much oil breakdown I guess.
Rule of thumb: Go with 15k oil changes if you add at least 2 quarts of oil as you go.
Go with 10k mile oil changes otherwise.

Re: Does adding oil mid-interval extend the change? [Re: gtmaster303] #4780397
06/07/18 04:39 PM
06/07/18 04:39 PM
Joined: Dec 2017
Posts: 1,222
US
JLTD Offline
JLTD  Offline
Joined: Dec 2017
Posts: 1,222
US
With a UOA backing it up, showing the oil is still good, no reason not to.


I'm a thickie; assimilate
But 20s have their place

Using AMSOIL

Hers: 2008 Jeep Liberty 138k, SS 5w30/Amsoil

His: 2015 4Runner 41k, OE 5w20/Wix

Re: Does adding oil mid-interval extend the change? [Re: gtmaster303] #4780398
06/07/18 04:42 PM
06/07/18 04:42 PM
Joined: Jun 2012
Posts: 1,736
USA
oldhp Offline
oldhp  Offline
Joined: Jun 2012
Posts: 1,736
USA
Expensive car and a long OCI??? Why??? Piece of junk, run it til whenever. Very nice car.......long OCI's. Sorry I don't get it.


2018 RAM 1500 3.6/8 speed.
2017 Jeep Sahara Unlimited 3.6
"U kan't fixe it......if'n it ain't broke."
Re: Does adding oil mid-interval extend the change? [Re: gtmaster303] #4780465
06/07/18 05:51 PM
06/07/18 05:51 PM
Joined: Feb 2014
Posts: 2,361
Kansan,1911 45ACP fan
Marco620 Offline
Marco620  Offline
Joined: Feb 2014
Posts: 2,361
Kansan,1911 45ACP fan
At most 100 miles per 100ml is all I could see tops. Your adding clean oil but the rest is already dirty so therotically yes but not by large margins of oci intervals


15' Civic R18 194k.0w20 Redline/Archoil9200 (https://twitter.com/hodgetwins?lang=en)
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Re: Does adding oil mid-interval extend the change? [Re: gtmaster303] #4780500
06/07/18 06:16 PM
06/07/18 06:16 PM
Joined: May 2013
Posts: 2,121
Saskatchewan, Canada
Johnny2Bad Offline
Johnny2Bad  Offline
Joined: May 2013
Posts: 2,121
Saskatchewan, Canada
No.


'57 FL Straight 50 wt
'90 Miata 1.8L w/Rotrex Supercharger [Mobil1 0W-40]
'96 Ram 1500 [3.7L Mobil1 0W-20 / 1L 15W-50]
'01 PT Cruiser [Mobil1 0W-40]
Re: Does adding oil mid-interval extend the change? [Re: gtmaster303] #4780519
06/07/18 06:35 PM
06/07/18 06:35 PM
Joined: Sep 2010
Posts: 7,594
Planet Earth
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,594
Planet Earth
While I would not go longer in a BMW without a subsequent UOA (and even then, why?), I can tell you based on my experience in my 2010 FX4 that adding even a half a quart increases the TBN and thus increases the overall potential OCI.

Re: Does adding oil mid-interval extend the change? [Re: bigjl] #4780564
06/07/18 07:13 PM
06/07/18 07:13 PM
Joined: May 2013
Posts: 681
Florida
SilverSnake Offline
SilverSnake  Offline
Joined: May 2013
Posts: 681
Florida
Originally Posted By: bigjl
But I would not do a 15k mile oil change in a BMW. More than a few BMW engines have serious issues amd I think over long OCI is part of the problem.


Good advice. The OLM on my wife's 2011 328i would have had us changing the oil every 15,000 to 18,000 miles (pure insanity in my view). Her new 2017 330i OLM would have us change it every 10,000 miles (still way too many miles for a DI Turbo IMO). Two different BMW dealer service departments told me the longer OCIs in older cars were, in fact, causing major engine issues thus the change. I change the oil in her cars every 6 months or 5,000 miles. Electronic oil measurements on both cars always show 100% and engines function flawlessly.

Last edited by SilverSnake; 06/07/18 07:18 PM.

2016 Charger, 6.4L-485 HP (PUP 0W-40)
2017 BMW 330i, 2L-248 HP (BMW 0W-20)
2018 Jeep GC, 5.7L-360 HP (PP 5W-20)
2008 20KW Generac (Amsoil 10W-30/30)
Re: Does adding oil mid-interval extend the change? [Re: gtmaster303] #4780646
06/07/18 08:10 PM
06/07/18 08:10 PM
Joined: Oct 2010
Posts: 5,378
Florida
Artem Offline
Artem  Offline
Joined: Oct 2010
Posts: 5,378
Florida
Originally Posted By: oil_film_movies

As it is, I think BMW did make a change in what it recommends. https://f30.bimmerpost.com/forums/showthread.php?t=868291
and they went to 10k miles (oops moment for them...). Reputation for too much oil breakdown I guess.
Rule of thumb: Go with 15k oil changes if you add at least 2 quarts of oil as you go.
Go with 10k mile oil changes otherwise.




Interesting turn of events... just when all manufacturers are INCREASING OCI even with Di and Turbo high strung 1.5L engines, etc, BMW is going BACKWARDS and DECREASING the OCIs just as oils have reached what is basically a very high level of capability in regards to Lube performance. Hmmmmm....

The real question is, did they do it for better engine protection or did the maintenance department guy have a little chat with the finance department guy at the water cooler and pointed out the extra $,$$$ they could be making with more frequent OCIs??? Lol.

Ah for the Love of Money...


2014 Mazda 3 Hatch 2.0L & 6spd - Idemitsu 0w20 Synthetic @ $0.75 a quart. (thanks Advance Auto Parts for the awesome deal)
Re: Does adding oil mid-interval extend the change? [Re: oil_film_movies] #4780660
06/07/18 08:24 PM
06/07/18 08:24 PM
Joined: Jun 2014
Posts: 112
NJ, USA
gtmaster303 Offline OP
gtmaster303  Offline OP
Joined: Jun 2014
Posts: 112
NJ, USA
Originally Posted By: oil_film_movies
Originally Posted By: gtmaster303
Exactly what the title says. My BMW Burns a quart in between it's 15k intervals. Does that mean I can go longer because fresh oil is added?
If its only 1 quart, thats not much. No extension. Now, if you were putting in 3 quarts, then 18k wouldn't be out of the question in my opinion. Adding oil does replenish detergents, anti-oxidants, ZDDP, dispersants, etc., so yeah. Its a matter of how much.
As it is, I think BMW did make a change in what it recommends. https://f30.bimmerpost.com/forums/showthread.php?t=868291
and they went to 10k miles (oops moment for them...). Reputation for too much oil breakdown I guess.
Rule of thumb: Go with 15k oil changes if you add at least 2 quarts of oil as you go.
Go with 10k mile oil changes otherwise.

My car is a 2012, technically that bulletin doesn't apply to it
The long intervals actually don't scare me, considering most oils would easily be up to the task - even non-approved ones
Car has been running like a top, 95k and counting


2012 BMW 528i xDrive
2010 Porsche Cayenne 3.6
Re: Does adding oil mid-interval extend the change? [Re: 2015_PSD] #4780670
06/07/18 08:31 PM
06/07/18 08:31 PM
Joined: Jun 2014
Posts: 112
NJ, USA
gtmaster303 Offline OP
gtmaster303  Offline OP
Joined: Jun 2014
Posts: 112
NJ, USA
Originally Posted By: 2015_PSD
While I would not go longer in a BMW without a subsequent UOA (and even then, why?), I can tell you based on my experience in my 2010 FX4 that adding even a half a quart increases the TBN and thus increases the overall potential OCI.

Just curious on other people's input
I wouldn't deliberately extend the interval, but it would give me some more peace of mind if I happen to run over or am late to change it

I really don't think the 15k interval is all that bad. Let's be honest, there are plenty of BMW drivers out there that don't know the where the hood release is, let alone maintenance intervals. And then there are plenty of people who will see warning lights and service overdue reminders but keep driving anyway. BMW would not give a 15k interval without some safety margin built in. ALL oil changes have safety margin built in. Otherwise we're all driving around in time bombs apparently...


2012 BMW 528i xDrive
2010 Porsche Cayenne 3.6
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