Finally broke 20K on my 2008 Malibu 2.4 Ecotec. I've noticed that it steadily consumes around 1/8-1/4 quart per 1000 miles since day 1. Not alarming, but is it normal for a vehicle to cosume oil straight off the showroom floor? Mixed diet of synthetic/dino every 3-7k up until now. Just wanted somebody elses opinion. Thanks.