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Sedans Cadillac DeVille Cadillac DeVille oil usage
38 messages, Last post on Mar 06, 2008 at 6:49 PM
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Replying to: richw5 (Jan 29, 2007 1:51 pm) I went thru the ringer at the dealer with the consumption tests and this and that. Never smoked or leaked either. I learned to live with it especially after reading other N-star owners posts here or on several Caddy only sites. That car gave me over 125k miles and 6 years of problem free ownership when I traded it for my 03 (which is better and uses 1/2 quart every 3000 miles ! My 90 4.9? 4.5? DeVille never used a drop of oil between changes and also was troublefree and traded at around 100k plus miles for the 96............ 
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Replying to: richw5 (Jan 29, 2007 1:51 pm) 'Puttering around' in a Northstar will carbon up the rings, stick them, and allow oil blowby. From a rolling start, floor it. I recommend running above 70mph. At 70mph, it's probably just shifting out of second. Run it up and allow to coast down several time. If you have the nerve to glance in the rear view mirror, you will probably see a lot of black smoke the first time or two you open it up. Do this every month or so. Your oil consumption will drop.
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Replying to: bolivar (Jan 29, 2007 11:17 pm) That sounds like my moms 98 Deville with a BIG 50k miles! I have to take it out and run it hard and watch the clouds of smoke during the first few WOTs.......... She has been wanting a SUV and more room to haul around the grandchildren and junk so we have been look ing at the great deals on a late model SRX. Me, I will buy her 98 for the little woman as her Escort is getting long in the tooth................ 
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Replying to: bolivar (Jan 29, 2007 11:17 pm) |
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Replying to: lagunshy (Jan 28, 2007 7:45 am)
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Replying to: csman (Feb 01, 2007 11:56 am)  aol.com
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Replying to: lagunshy (Feb 01, 2007 2:18 pm)
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Replying to: csman (Feb 02, 2007 6:50 am) |
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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
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Replying to: hagen03 (Jul 17, 2007 4:29 am) 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? |
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