Seville SLS

Excessive Engine Oil Consumption on Cadillac Seville SLS

Problem Description and Possible Solution

Vehicles equipped with the 4.6L engine may develop excessive oil consumption. Please be advised that under optimum driving conditions, using one quart of oil every 2000 miles is acceptable. This Cadillac standard applies to vehicles with less that 50,000 miles. Our technicians tell us that if you experience excessive oil consumption it may be caused by built up on the piston rings which restricts movement, preventing them from wiping all the oil from the cylinder walls. Oil left behind is then burned during the combustion process. There is a special ring cleaning procedure which can help this situation. The GM service bulletin number is #02-06-01-009C.

Problem Data
RepairPal Verified
Average mileage: 87,545 (57,795–133,021)
8 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002, 2003
18 people reported this problem
Viewing 1 - 5 of 5 comments
Started using lots of oil around 82K. Switched to 10w 30 REGULAR oil, and it has helped some. Didn't know about a cleaning procedure. Is it expensive?
oil changed two months ago, it has burned 2.5 quarts since. the car runs fine. Have pending appointment to address the problem
From using almost NO oil in the early days, it now loses a quart about every 1000 miles. This "don't touch it for 100,000 miles" engine is flunking the test--I had a 97 that was even worse....There is a virus in that engine...