Last post on Mar 06, 2008 at 6:49 PM
You are in the Cadillac DeVille
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Cadillac DeVille, Cadillac, Engine, Oil
#13 of 38 Re: oil usage [lagunshy]
Feb 01, 2007 (11:56 am)
I have a 2003 Deville that is consuming 3+ quarts between oil changes; it is in the shop now because after I had the top clean done to clean the rings or whatever it was now it is sputtering and will shut off. This may or may not be related but I am estatic to find someone dealing with a simular problem. I am going back and forth now with my extended warranty company who want me to assume cost for tearing the motor down with no assurance that they will pay (depending on the determined cause of usage). And in worst case scenerio I may be responsible for the repair cost of over $5000. I have read your prev. comments and want to know more. You contacted the Cad. people not the warranty co? and what was the determined cause of the usage? I was told that a qt. per 1K miles is not usual. If so I think that is ridiculous for a Cadillac. Please Help!! ANYONE
#14 of 38 Re: oil usage [csman]
Feb 01, 2007 (2:18 pm)
yes sir 1qt. every three thousand is excessive. call cad 800# in the back of your manual. i played heck for 3 months to get help. i ended up doing an oil usage consumption test for 3 thousand miles and the cad rep of my dealer fell under all the pressure and the did a complete rebuild. the cause is due to a test set of pistons and ring combination that the rings are solid and cant shed the carbon build up. cad ownes resposability for this and i was clear out of warranty but do not give up. it willo take cad out of california a couple days to get back to you but they will. the run your cad a little differantly theory is after all is said and done to a couple times a month put your foot in it to blow this build up out.also that top end clean out is a crock of you know what.too late to tell you not to do it but i didnt let them take that route. you have my sympithy with what you are going through but do not let up or give up. contact me anytime for whatever i can do to help at lagunshyaol.com
#15 of 38 Re: oil usage [lagunshy]
Feb 02, 2007 (6:50 am)
Thanks, I going to do a consumption test with close monitoring for the next 2k-3k miles and go from there. You have been really helpful. Your messages have caused me to do a lot of research on this and I have been shocked to find that more folks than not are have this same problem. I may contact you later. Thanks
#16 of 38 Re: oil usage [csman]
Feb 06, 2007 (4:04 pm)
you are more than welcome. if all thepain i went though helps another then it may have been worth it!!!!
#17 of 38 Oil usage 2000 DHS
Jul 17, 2007 (4:29 am)
My 2000 DHS now has 116,000 on it. It has always used a quart of oil to 800 to 1000 miles. Now it uses a quart to 500. Being a retired mechanic, I know the process dealers try to put you through, so I have never taken this car to a dealer. I bought this car used with 47000 miles on it, from a local Chevrolet dealer who is no longer in business. I've been looking for a different car but it is hard to beat the ride of a Caddie. Ed Hagen
#18 of 38 Re: Oil usage 2000 DHS [hagen03]
Jul 17, 2007 (12:24 pm)
Have you heard about the 'drive it like you stole it' possible 'fix' for this problem?
Northstar's rings get carboned up from being driven 'easy', stick, and use oil. If you take the car out and run it to red-line thru the first 3 gears, this will many times break the carbon loose and significantly reduce the oil usage. Two or three 'runs' will be needed.
You don't have to do a drag-race start. Just do a rolling start in first gear and hold the accelerator to the floor thru 2 or 3 upshifts. Of course, this means you will be going about 80+mph, so any ticket you get 'Don't call me'!
If is also recommended you let the car 'coast down' with no accelerator. This also is supposed to let the rings 'flutter' and break carbon loose.
If the car has been 'babied' all it's life, there is supposed to be a huge cloud of black smoke produced out the exhaust during these runs.
If this helps, you should run the car hard about once a month like this to keep the rings free of carbon.
Report back on your success?
#19 of 38 Re: Oil usage 2000 DHS [hagen03]
Jul 17, 2007 (4:32 pm)
It works, Ed!
After two previous "carbon" jobs on my 2001 DHS while under warranty, I got the inside scoop from the local Cadillac service mgr:
Run it up to redline about once a month to keep those rings running smoothly and to reduce oil consumption. I now add a quart only after about 3,000 miles - certainly an acceptable rate of consumption for this engine.
Actually, I was once told by a trusted Mercedes mechanic that a good engine needs to consume some oil to keep everything lubricated properly.
#20 of 38 Re: oil usage
Jul 23, 2007 (9:12 am)
I've just gotten a '97 DeVille and it didn't come with a manual, just the maint'-sheet from the previous owner.
I'm tracking auctions on eBay right now but they don't end for a while and with shipping it could take a few weeks.
I'm wondering where I can find a list of information on my car such as which oil weight to use, how many quarts it takes [on change] as well as the recommended filters and fluids, tire pressure, etc.
Any info is appreciated.
#21 of 38 Re: oil usage [xeperx]
Jul 23, 2007 (1:57 pm)
I think if you 'register' you can download an owner's manual here...
If not, google is your friend. There are other places available.
Oil will probably be 10W-30. It will take 7 1/2 quarts with filter change for a Northstar, which is what you have. Do not overfill, put 7 1/2 quarts in it. Stop, even if the dipstick shows about 1/2 quart low!
Every place you can buy a filter has a book which shows what filter you need.
#22 of 38 Re: oil usage [bolivar]
Jul 23, 2007 (2:13 pm)
Thanks a ton.
Does the quality of an oil filter vary much from brand to brand? I usually buy FRAM but that's mostly out of price/name recognition.