Other Cadillac Engines Discussion, Oil loss on '95 Seville STS in Cadillac Engine Technical Discussion; Just recently I bought an old '95 Seville STS with around 130K miles on it.
After every approx. 1000 miles, ...
Just recently I bought an old '95 Seville STS with around 130K miles on it.
After every approx. 1000 miles, the "check oil level" message shows up and I need to add 1 liter (1.1 quarts) of oil.
I am quite sure that I am not losing oil as I never found any oil laugh below the car. Only thing is, that on the left side exhaust end I can see residues of soot on the rear bumper. However, I am not sure if this is caused by the oil problem. The soot isn't oily and therefore at least I am sure that the oil is "properly" burned.
The car drives very well and I believe that it still delivers maximum performance.
Does anyone have an idea of
- what could be wrong with the engine?
- parts that should be replaced anyway because of the high milage?
- and how much labor could be involved?
I believe your car comes with the NorthStar engine, so I would repost it in that section, for better reply results..
Personally, 1 qtr every 1000 miles isnt a terrible loss if the engine is burning it, especially if your car has higher miles like you do... My 95 deville has 72k and I add a qtr of oil every 1500k or so.. From what ive read in here, the northstar engines have an 'aggressive' cross-hatch patern on the cylindr walls, this helps to keep a film of oil to protect the piston rings better, but as a side effect, we burn more oil... The price of a qtr of oil ($1.25-$3.50) every 1000 miles is a small price to pay.
I'm driving US cars since more than 10 years. That included cars with 5L smallblocks and supercharged 3.8L 6 Cylinders (Ford & GM). None of these cars burned more oil than 1 qtr per 30K miles.
Therefore I was so surprised to see such a high oil consumption on the Northstar engine.
However, in the meantime I found many other postings related to this topic, claiming to have a relatively high oil consumption.
Obviousely this seems to be normal to the Northstar engine. I just wonder why BMW, Mercedes and Audi V8 engines consume much less oil.
If it is normal that the Northstar burns 1 qtr, then I am fine with that. I don't have a problem to pay for the oil, but I wouldn't like to invest thousands of dollars into an engine revision.