Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

Page 1 of 2 12 LastLast
Results 1 to 15 of 19

Thread: High oil consumption (1 quart/week!!)

  1. #1
    Join Date
    Apr 2006
    Location
    North Brunswick, NJ
    Age
    28
    Posts
    4,236

    High oil consumption (1 quart/week!!)

    The 2000 SLS. I check all the car's fluids weekly. Every time I check the SLS it is below the add mark. This is every single week, which is about only 100-200 miles. So as a test, one week when I noticed it was low, I didn't add any oil that week. The next week, the dipstick had only one drop of oil on it at the bottom. So it seems like it lost another quart!

    Weekly, the engine will take 1 quart, and then puts it near the top (I don't fill it exactly to the top as per the technical archives). My 95 Eldorado is normal, 1 quart of oil every 1000 miles or so.

    What should I do next?


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    codewize's Avatar
    codewize is offline Cadillac Owners Master
    Automobile(s): 91 Brougham d'Elegance / 95 Fleetwood Broug/ 01 DTS / 11 CTS Lux
    Join Date
    Apr 2005
    Location
    Upstate NY
    Age
    50
    Posts
    6,920

    Re: High oil consumption (1 quart/week!!)

    1 qt per 100 miles sounds like a pretty good leak to me.

    I take it this started suddenly?

    Is it leaking by the filter maybe after the last oil change?
    Ownership:
    91 Brougham d'Elegance 350
    95 Fleetwood Brougham
    01 Custom Deville DTS
    2011 CTS4 Luxury

    Memberships:
    National and regional Cadillac & LaSalle Club
    Proud Volunteer - Northstar Tuning Project
    Guinness World Records - Largest Cadillac Parade

    ----------------------------

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,262

    Re: High oil consumption (1 quart/week!!)

    A qt. per 100 - 200 miles should either be smoking like an old steam engine or leaking like a sieve (sp?) and easy to locate.

  5. #4
    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
    Automobile(s): 2006 STS V8 AWD, '95 Ford Ranger
    Join Date
    Jul 2004
    Location
    Fairbanks, Ak
    Age
    77
    Posts
    28,283

    Re: High oil consumption (1 quart/week!!)

    Sounds like my old pickup. I pull into the gas station and say "Gas, oil, and water; a gallon of each. Just pour the oil on the fender because it's going to leak on the ground anyhow."

  6. #5
    clarkz71's Avatar
    clarkz71 is online now Cadillac Owners Connoisseur
    Automobile(s): 2000 Eldorado ESC
    Join Date
    Mar 2006
    Location
    Fort Lauderdale, Florida
    Age
    53
    Posts
    1,361

    Re: High oil consumption (1 quart/week!!)

    Inspect the engine for leaks, top to bottom. if it's not leaking it's burning it. pull the plugs and look for crusty build-up.

  7. #6
    Zorb750 is offline Cadillac Owners Connoisseur
    Automobile(s): 1997 Eldorado, 2003 Audi RS6
    Join Date
    Apr 2005
    Location
    Oakland County, MI
    Age
    33
    Posts
    1,320

    Re: High oil consumption (1 quart/week!!)

    One to try... jack up the front of the car evenly, and use a cinderblock or something (on a garbage bag so as not to damage the mat) to prop the accelerator at a normal driving RPM (1500 will be great). Look around the oil filter for leaks. There are two o-rings at the back of the adapter plate that can leak, and I have seen these cars with one bolt loose on the adapter plate, causing a similar leak. Usually it won't be so bad as to leak at idle, hence the RPM increase. From idle to about 15-1800 is the single largest increase in oil pressure to RPM ratio.

    Look at the oil pressure/temperature sensor too. They can be loose (seen that one too). Understand that they have a pipe thread, which is tapered, so won't simply tighten until it stops, they get progressively tighter. Just use good judgement dealing with them. As far as tightening goes, it's a real pain with the adapter still on the car. The best thing to do is to try to give it a twist with some med. large channellocks. If it turns at all easily, then disconnect the wire and tighten it, then reconnect it. Do NOT grab it by the plastic sensor body. Mine cracked lengthwise in that place and made a huge mess of the car's underbody on a highway drive. It also dumped about a quart and a half of oil over the course of 25 miles. My sensor was original and never tightened in this manner.

    Also, this one will sound totally braindead, and I am not intending insult, but be sure that the oil filter is tight. I never use tools to tighten them, I give it a good spin (a few drops of oil on the threads instead of just the gasket helps with that), turn it as far as it turns reasonably easily, then give it a half a turn or so by hand. It should still be possible to tighten by hand just a little bit more, but they tighten up a bit so don't. You should be able to JUST BARELY remove it by hand at your next oil change, assuming it's clean and dry.

  8. #7
    Join Date
    Apr 2006
    Location
    North Brunswick, NJ
    Age
    28
    Posts
    4,236

    Re: High oil consumption (1 quart/week!!)

    Thanks for the advice. The bad thing is there are no leaks or smoke for the SLS. Left it in the driveway overnight all the time, and nothing under the car, not even a wet spot. Starts up and WOTs with no smoke at all. I can only think the leak is from actual driving, so I wouldn't see it in the driveway.

    Car is becoming a nuisance. Lots more trouble then my Eldo, and my Eldo is way older, has more miles, and works a lot harder (I am a lead foot, and the whole town knows it).

  9. #8
    clarkz71's Avatar
    clarkz71 is online now Cadillac Owners Connoisseur
    Automobile(s): 2000 Eldorado ESC
    Join Date
    Mar 2006
    Location
    Fort Lauderdale, Florida
    Age
    53
    Posts
    1,361

    Re: High oil consumption (1 quart/week!!)

    If it's leaking while driving the engine would still be wet with oil. If it is wet (with oil) clean it off completly and drive it a short distance and recheck. The oil is going somewhere, it doesn't evaporate.

  10. #9
    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
    Automobile(s): 2006 STS V8 AWD, '95 Ford Ranger
    Join Date
    Jul 2004
    Location
    Fairbanks, Ak
    Age
    77
    Posts
    28,283

    Re: High oil consumption (1 quart/week!!)

    There are oil leak detector kits at NAPA that put a dye in the oil that makes seeing the leaks easier. Worth a try.

  11. #10
    clarkz71's Avatar
    clarkz71 is online now Cadillac Owners Connoisseur
    Automobile(s): 2000 Eldorado ESC
    Join Date
    Mar 2006
    Location
    Fort Lauderdale, Florida
    Age
    53
    Posts
    1,361

    Re: High oil consumption (1 quart/week!!)

    I agree.

  12. #11
    rugby2 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Oct 2006
    Posts
    11

    Re: High oil consumption (1 quart/week!!)

    has anyone ever gotten 150k on their northstar, with no problems?wish I read this site before buying a caddy.

  13. #12
    Join Date
    Jun 2004
    Posts
    77

    Re: High oil consumption (1 quart/week!!)

    Sure they have - you rarely hear about them on forums such as this because people rarly seek out a forum to brag how trouble free their car is.

  14. #13
    clarkz71's Avatar
    clarkz71 is online now Cadillac Owners Connoisseur
    Automobile(s): 2000 Eldorado ESC
    Join Date
    Mar 2006
    Location
    Fort Lauderdale, Florida
    Age
    53
    Posts
    1,361

    Re: High oil consumption (1 quart/week!!)

    Quote Originally Posted by rugby2 View Post
    has anyone ever gotten 150k on their northstar, with no problems?wish I read this site before buying a caddy.
    What problems do you have with yours?

  15. #14
    94RM is offline Cadillac Owners Member
    Automobile(s): 94 DeVille Concours
    Join Date
    Nov 2004
    Location
    N. Augusta, SC
    Age
    80
    Posts
    37

    Re: High oil consumption (1 quart/week!!)

    Another thing you may want to check, under the intake manifold cover.

    I was checking for fuel leaks recently and discovered about a half inch of
    oil in the bottom of the intake, I cleaned it up and made sure the PCV system
    was clear.

  16. #15
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,262

    Re: High oil consumption (1 quart/week!!)

    Quote Originally Posted by clarkz71 View Post
    What problems do you have with yours?
    See post #90

    http://www.cadillacforums.com/forums...rs-like-9.html

Page 1 of 2 12 LastLast

Bookmarks

Cadillac Posting Rules

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Read about Lincoln | Buick | Kia Forte Forum