I am looking for some information on the oil usage of the northstar engine. I am looking at a 2000 STS. If I purchase it, it will be my second Caddy. I have heard that the northstar engine requires a quart of oil every 1400 miles. For the past six years, I have driven my 94 Caddy with the 4.9L from Arizona to Florida with no loss of oil. Does anyone out there have a northstar engine? If so, can you share some information on this topic?