I use a quart or so between OEM oil changes, probably about 8K miles or so. <2001 3 liter bought June 2000, now has about 36K miles.> I have a 15 month old X-5 (1991) with around 18,000 miles on the 3.0 engine. I am burning around 1 quart of synthetic oil every 3000 miles or so. The dealer says this is normal. I have 3 friends with bimmers who have never added a single drop of oil. Is it really normal to burn this much oil?