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High oil consumption with 60k miles #4582075
11/22/17 03:48 PM
11/22/17 03:48 PM
Joined: Nov 2016
Posts: 1
Arizona
dcmeigs Offline OP
dcmeigs  Offline OP
Joined: Nov 2016
Posts: 1
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?

Re: High oil consumption with 60k miles [Re: dcmeigs] #4582080
11/22/17 03:56 PM
11/22/17 03:56 PM
Joined: Dec 2003
Posts: 9,926
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,926
Florida, Cape Coral
I would looked for a gummed up PCV system.


CX5 Touring 2.5L :-)
Re: High oil consumption with 60k miles [Re: dcmeigs] #4582094
11/22/17 04:12 PM
11/22/17 04:12 PM
Joined: Mar 2011
Posts: 411
new jersey
hemitruck Offline
hemitruck  Offline
Joined: Mar 2011
Posts: 411
new jersey
I would also try a HM oil.

Re: High oil consumption with 60k miles [Re: dcmeigs] #4582109
11/22/17 04:26 PM
11/22/17 04:26 PM
Joined: Mar 2013
Posts: 5,034
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 5,034
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.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Wanted: 2019 Ford Ranger
Re: High oil consumption with 60k miles [Re: skyactiv] #4582115
11/22/17 04:34 PM
11/22/17 04:34 PM
Joined: Oct 2014
Posts: 4,043
Utah
CKN Online content
CKN  Online Content
Joined: Oct 2014
Posts: 4,043
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.

Re: High oil consumption with 60k miles [Re: dcmeigs] #4582126
11/22/17 04:50 PM
11/22/17 04:50 PM
Joined: Aug 2011
Posts: 3,264
n.c.
gman2304 Offline
gman2304  Offline
Joined: Aug 2011
Posts: 3,264
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.

Last edited by gman2304; 11/22/17 04:55 PM.
Re: High oil consumption with 60k miles [Re: dcmeigs] #4582226
11/22/17 06:35 PM
11/22/17 06:35 PM
Joined: Aug 2008
Posts: 21,282
ON, Canada eh?
StevieC Offline
StevieC  Offline
Joined: Aug 2008
Posts: 21,282
ON, Canada eh?
It's probably the low friction rings. frown


'18 Dodge Grand Caravan GT - AMSOIL SS 5w20
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: High oil consumption with 60k miles [Re: dcmeigs] #4582254
11/22/17 07:04 PM
11/22/17 07:04 PM
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,803
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, 181 miles M1 HM 10w-30
Re: High oil consumption with 60k miles [Re: StevieC] #4582304
11/22/17 07:41 PM
11/22/17 07:41 PM
Joined: Mar 2016
Posts: 1,643
Western S.C.
CR94 Online content
CR94  Online Content
Joined: Mar 2016
Posts: 1,643
Western S.C.
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 94K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K
Re: High oil consumption with 60k miles [Re: dcmeigs] #4582315
11/22/17 07:45 PM
11/22/17 07:45 PM
Joined: Aug 2008
Posts: 21,282
ON, Canada eh?
StevieC Offline
StevieC  Offline
Joined: Aug 2008
Posts: 21,282
ON, Canada eh?
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.

Last edited by StevieC; 11/22/17 07:46 PM.

'18 Dodge Grand Caravan GT - AMSOIL SS 5w20
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: High oil consumption with 60k miles [Re: SilverFusion2010] #4582316
11/22/17 07:46 PM
11/22/17 07:46 PM
Joined: Dec 2016
Posts: 7,151
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,151
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."
Re: High oil consumption with 60k miles [Re: StevieC] #4582440
11/22/17 09:27 PM
11/22/17 09:27 PM
Joined: Dec 2013
Posts: 2,449
Fort Worth, Texas
clinebarger Online content
clinebarger  Online Content
Joined: Dec 2013
Posts: 2,449
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/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: High oil consumption with 60k miles [Re: dcmeigs] #4582460
11/22/17 09:55 PM
11/22/17 09:55 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
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.

Re: High oil consumption with 60k miles [Re: clinebarger] #4582468
11/22/17 10:07 PM
11/22/17 10:07 PM
Joined: Jul 2017
Posts: 365
PR CA, USA
2strokeNorthstar Offline
2strokeNorthstar  Offline
Joined: Jul 2017
Posts: 365
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.

Last edited by 2strokeNorthstar; 11/22/17 10:08 PM.
Re: High oil consumption with 60k miles [Re: dcmeigs] #4582504
11/22/17 10:57 PM
11/22/17 10:57 PM
Joined: Sep 2014
Posts: 1,489
Toronto Canada
WobblyElvis Offline
WobblyElvis  Offline
Joined: Sep 2014
Posts: 1,489
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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