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More oil consumption with Castrol 0w40 over 0w30? #4509580
09/06/17 10:34 PM
09/06/17 10:34 PM
Joined: Nov 2008
Posts: 5
Michigan
levesqu6 Offline OP
levesqu6  Offline OP
Joined: Nov 2008
Posts: 5
Michigan
2006 bmw 330i with the NA N52 straight 6. I have previously been using longlife-01 Castrol 0w30 and switched to longlife-01 Castrol 0w40 since its cheaper, available locally, and so i can just buy one type of oil for it and the old m3. I have have noticed around another quart of oil consumption over 10k miles with the 0w40. This question is more of a curiosity if a thicker oil could burn at a higher rate than a thinner oil. In my case it is possible that theres something else like the weeping oil pan got worse (though i havent noticed spots on driveway).

Re: More oil consumption with Castrol 0w40 over 0w30? [Re: levesqu6] #4509585
09/06/17 10:45 PM
09/06/17 10:45 PM
Joined: Dec 2016
Posts: 506
E. Tennessee
WhizkidTN Offline
WhizkidTN  Offline
Joined: Dec 2016
Posts: 506
E. Tennessee
I'd check your PCV valve.


His: '12 Kia Optima SX - 2.0L GDI Twin-Scroll Turbo [Tuned] (74K)
>EDGE 0W-40, Fram XG9688
Her's: '14 Nissan Rogue SL AWD - 2.5L NA (70K)
>EDGE 0W-20, Fram XG6607
Re: More oil consumption with Castrol 0w40 over 0w30? [Re: levesqu6] #4509595
09/06/17 11:01 PM
09/06/17 11:01 PM
Joined: Oct 2008
Posts: 867
MA USA
andrewp1998 Offline
andrewp1998  Offline
Joined: Oct 2008
Posts: 867
MA USA
aks trav!


2001 Honda civic HX vtecE- 5 spd,232k+
Re: More oil consumption with Castrol 0w40 over 0w30? [Re: levesqu6] #4509599
09/06/17 11:08 PM
09/06/17 11:08 PM
Joined: Jul 2013
Posts: 348
D/FW Metroplex
The_Nuke Offline
The_Nuke  Offline
Joined: Jul 2013
Posts: 348
D/FW Metroplex
Not unheard of in some engines. See if you can find the NOACK values for each on PQI. If the 0W-40 has a higher NOACK, the behavior you're seeing is normL, for lack of a better word, and shouldnt be of great concern IMHO.


2012 Charger Pursuit aka "The Bacon Hauler"
- 5.7L + NAG1 (A5) + 2.62 (215mm)
Re: More oil consumption with Castrol 0w40 over 0w30? [Re: levesqu6] #4510003
09/07/17 01:47 PM
09/07/17 01:47 PM
Joined: Feb 2008
Posts: 1,102
PA
umungus1122 Offline
umungus1122  Offline
Joined: Feb 2008
Posts: 1,102
PA
A qt. over 10k miles is no biggie. It happens when changing grades/brands also sometimes.


'95 Chevy 1/2t 305 205k -NexGen Maxlife 5w-30, Wix filter
'89 Jeep Comanche 4.0 278k - GC 0w-30, Bosch LongLife filter
Re: More oil consumption with Castrol 0w40 over 0w30? [Re: levesqu6] #4510050
09/07/17 02:31 PM
09/07/17 02:31 PM
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
Just curious how you noticed the consumption? Did you get the "add a L" warning? Maybe it is just your sensor giving a strange reading, can be caused by a little water contamination in the oil.

Last edited by mightymousetech; 09/07/17 02:31 PM.

Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: More oil consumption with Castrol 0w40 over 0w30? [Re: levesqu6] #4510494
09/07/17 10:44 PM
09/07/17 10:44 PM
Joined: Nov 2008
Posts: 5
Michigan
levesqu6 Offline OP
levesqu6  Offline OP
Joined: Nov 2008
Posts: 5
Michigan
The car has a electronic dip stick so thats how i know when to add. It gets driven primarily on the highway for a least 25miles at a time so I'd be surprised if there was much water in the oil.

When i say a quart more i think it went from 1.5 to 2.5quarts over 10k miles. Still plenty acceptable but I'm asking here out of curiosity. I havent had a chance to find the NOACK % for these oils. Didnt know what that was until you suggested looking into it!

Re: More oil consumption with Castrol 0w40 over 0w30? [Re: levesqu6] #4510553
09/08/17 05:26 AM
09/08/17 05:26 AM
Joined: Jun 2016
Posts: 551
South OZ
KL31 Offline
KL31  Offline
Joined: Jun 2016
Posts: 551
South OZ
Could be coincidence and could be that you'll need to do a few runs on the 0w40 to see if that level of consumption continues or not.


95 MX-3 2.5L|Shell Helix Ultra 5W40|Wix 51356
04 Focus 1.8L|Wesfil Cooper WZ63|Valvoline MST 5W30
05 Kluger 3.3L|Wesfil Cooper WZ418|Magnatec 10W30 Semi Syn
Re: More oil consumption with Castrol 0w40 over 0w30? [Re: levesqu6] #4510600
09/08/17 07:06 AM
09/08/17 07:06 AM
Joined: Jul 2015
Posts: 4,624
Down Under
SR5 Offline
SR5  Offline
Joined: Jul 2015
Posts: 4,624
Down Under
Quote:
330i with the NA N52 straight 6

That is a nice engine.


Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154
Re: More oil consumption with Castrol 0w40 over 0w30? [Re: levesqu6] #4510612
09/08/17 07:26 AM
09/08/17 07:26 AM
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
Originally Posted By: levesqu6
The car has a electronic dip stick so thats how i know when to add. It gets driven primarily on the highway for a least 25miles at a time so I'd be surprised if there was much water in the oil.

When i say a quart more i think it went from 1.5 to 2.5quarts over 10k miles. Still plenty acceptable but I'm asking here out of curiosity. I havent had a chance to find the NOACK % for these oils. Didnt know what that was until you suggested looking into it!


Interesting. Yes, I know about the electronic dipstick, have had many BMWs, including the same 06 330 as you. I would like this is just a coincidence as the 0W30 and 0W40 are nearly the exact same oil. Only a very slight difference in 100 C viscosity between the two.


Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: More oil consumption with Castrol 0w40 over 0w30? [Re: SR5] #4511386
09/09/17 08:31 AM
09/09/17 08:31 AM
Joined: Nov 2008
Posts: 5
Michigan
levesqu6 Offline OP
levesqu6  Offline OP
Joined: Nov 2008
Posts: 5
Michigan
Originally Posted By: SR5
Quote:
330i with the NA N52 straight 6

That is a nice engine.


it is! its got a few typical bmw issues... leaky valve covers, oil pan gaskets, eats a water pump before 100k miles ($500 electric unit), ignition coils, and vanos solenoids that need to be cleaned or replaced every 100k. The engine is throttled by variable valve lift which I think is the source of the delay that makes it a challenging powertrain to drive smoothly when coupled with a manual transmission. But it makes great smooth power, and is very light since it has a magnesium alloy block.


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