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#4582075 - 11/22/17 03:48 PM High oil consumption with 60k miles
dcmeigs Offline


Registered: 11/17/16
Posts: 1
Loc: Arizona
I have a 2004 Cadillac STS with about 60k miles. It sets in the garage in Arizona all summer and then gets driven in the winter. We're snow birds. The oil gets changed yearly with Mobil One and I use WIX filters.

I took it on a big road trip and found that it was using about a quart of 30w5 mobil one every thousand miles. The cars never been abused and I've never run it low on oil. It doesn't smoke at idle or at start. It runs great.

I'm going to pull the plugs and see if I have one oily plug and 5 clean ones, but not today.

Any ideas as to improving on oil consumption?

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#4582080 - 11/22/17 03:56 PM Re: High oil consumption with 60k miles [Re: dcmeigs]
Eddie Offline


Registered: 12/07/03
Posts: 9569
Loc: Florida, Cape Coral
I would looked for a gummed up PCV system.
_________________________
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#4582094 - 11/22/17 04:12 PM Re: High oil consumption with 60k miles [Re: dcmeigs]
hemitruck Offline


Registered: 03/18/11
Posts: 374
Loc: new jersey
I would also try a HM oil.

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#4582109 - 11/22/17 04:26 PM Re: High oil consumption with 60k miles [Re: dcmeigs]
skyactiv Offline


Registered: 03/02/13
Posts: 4399
Loc: The Midwest
Switch oil brands. There have been reports of people who've had oil consumption issues using Mobil1. They claim the oil consumption stopped or greatly reduced when they switched to something else. NOACK has nothing to do with it.
_________________________
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Me: 13' VW GTI 3 door 6 speed manual

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#4582115 - 11/22/17 04:34 PM Re: High oil consumption with 60k miles [Re: skyactiv]
CKN Offline


Registered: 10/14/14
Posts: 3700
Loc: Utah
Originally Posted By: skyactiv
Switch oil brands. There have been reports of people who've had oil consumption issues using Mobil1. They claim the oil consumption stopped or greatly reduced when they switched to something else. NOACK has nothing to do with it.



Yep-and the Earth is flat. Many claims made on here that are outlandish.

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#4582126 - 11/22/17 04:50 PM Re: High oil consumption with 60k miles [Re: dcmeigs]
gman2304 Offline


Registered: 08/11/11
Posts: 3057
Loc: n.c.
I had the same issue with my STS. Mine was a 95 model, but I was told the Northstar engines use oil. I hated having to put a qt of oil in the trunk and having to top off every thousand miles when on a road trip. I used Mobil1 as well. Mine never smoked either but I couldn’t get past the oil usage problem. I sold it in 2000.


Edited by gman2304 (11/22/17 04:55 PM)

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#4582226 - 11/22/17 06:35 PM Re: High oil consumption with 60k miles [Re: dcmeigs]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
It's probably the low friction rings. frown
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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#4582254 - 11/22/17 07:04 PM Re: High oil consumption with 60k miles [Re: dcmeigs]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1663
Loc: Crawfordville FL
Try M1 HM 10w-30. It's a very thick 30 and should help slow consumption of it is the rings.

Try a can of BG109 on the chance that the rings are stuck.
_________________________
2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

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#4582304 - 11/22/17 07:41 PM Re: High oil consumption with 60k miles [Re: StevieC]
CR94 Offline


Registered: 03/20/16
Posts: 1120
Loc: Western S.C. since 1996
Originally Posted By: StevieC
It's probably the low friction rings.
Your theory as to exactly how they cause oil-guzzling?
_________________________
2011 Toyota Prius now at 88K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K

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#4582315 - 11/22/17 07:45 PM Re: High oil consumption with 60k miles [Re: dcmeigs]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
There are a lot of low friction ring problems. Not all vehicles with low friction rings have oil consumption but some do. I suspect this is the case if the PCV valve isn't the cause because GM has had issues with lower friction rings on some engines.


Edited by StevieC (11/22/17 07:46 PM)
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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#4582316 - 11/22/17 07:46 PM Re: High oil consumption with 60k miles [Re: SilverFusion2010]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: SilverFusion2010
Try M1 HM 10w-30. It's a very thick 30 and should help slow consumption of it is the rings.


Exactly what I was going to suggest. It is worth a try.
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4582440 - 11/22/17 09:27 PM Re: High oil consumption with 60k miles [Re: StevieC]
clinebarger Online   content


Registered: 12/19/13
Posts: 1916
Loc: Fort Worth, Texas
Originally Posted By: StevieC
There are a lot of low friction ring problems. Not all vehicles with low friction rings have oil consumption but some do. I suspect this is the case if the PCV valve isn't the cause because GM has had issues with lower friction rings on some engines.


Some of the earlier Northstars had ring issues, GM redesigned the ring pack in 2003.

But, It wouldn't be a bad idea to soak the pistons with some cleaner while the spark plugs are out.
-Get the engine up to operating temp.
-Remove all 8 plugs.
-Rotate the engine to where no piston is at TDC.
-Buy 2 bottles of Piston and Ring Cleaner, P/N 12378549.
-Distribute 1 bottle to the right bank & one to the left bank.
-Let the cleaner sit in the cylinders for at least 2 hours, But NO MORE than 3 hours.
-Place some heavy towels over the left & right spark plug holes, Turn the engine over several times with the starter to evacuate the cleaner from the cylinders. (The COILS should be on your work bench during this, You do not want any spark!!)
-Reinstall the plugs & coils.

Warm up the engine thoroughly......And RUN THE [censored] OUT OF IT!!!! I mean REALLY BEAT on it!!!! It will not break, This engine loves to be ran hard.
_________________________
2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto

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#4582460 - 11/22/17 09:55 PM Re: High oil consumption with 60k miles [Re: dcmeigs]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: dcmeigs
Any ideas as to improving on oil consumption?


Try a different oil. You're new so you probably don't know about all the complaints that M1 5W-30 gets.

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#4582468 - 11/22/17 10:07 PM Re: High oil consumption with 60k miles [Re: clinebarger]
2strokeNorthstar Offline


Registered: 07/19/17
Posts: 274
Loc: PR CA, USA
The only solution and it may not last forever. Some Northstars needed this every few years depending how they are driven. The motors were really mismatched to the car. The motor liked to be driven hard and put into a car where drivers drive more relaxed. I had a Northstar Deville for many years and it drank oil. Ask Cadillac mechanics that have been around a while. They all have stories about these motors. Big money makers for mechanics.

Originally Posted By: clinebarger
Originally Posted By: StevieC
There are a lot of low friction ring problems. Not all vehicles with low friction rings have oil consumption but some do. I suspect this is the case if the PCV valve isn't the cause because GM has had issues with lower friction rings on some engines.


Some of the earlier Northstars had ring issues, GM redesigned the ring pack in 2003.

But, It wouldn't be a bad idea to soak the pistons with some cleaner while the spark plugs are out.
-Get the engine up to operating temp.
-Remove all 8 plugs.
-Rotate the engine to where no piston is at TDC.
-Buy 2 bottles of Piston and Ring Cleaner, P/N 12378549.
-Distribute 1 bottle to the right bank & one to the left bank.
-Let the cleaner sit in the cylinders for at least 2 hours, But NO MORE than 3 hours.
-Place some heavy towels over the left & right spark plug holes, Turn the engine over several times with the starter to evacuate the cleaner from the cylinders. (The COILS should be on your work bench during this, You do not want any spark!!)
-Reinstall the plugs & coils.

Warm up the engine thoroughly......And RUN THE [censored] OUT OF IT!!!! I mean REALLY BEAT on it!!!! It will not break, This engine loves to be ran hard.


Edited by 2strokeNorthstar (11/22/17 10:08 PM)

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#4582504 - 11/22/17 10:57 PM Re: High oil consumption with 60k miles [Re: dcmeigs]
WobblyElvis Offline


Registered: 09/23/14
Posts: 1345
Loc: Toronto Canada
The advice above about cleaning the engine with some liquid poured in through the spark plugs holes may be a good idea but let the engine cool first. You don't want to crack a piston.

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