My 2002 Silverado 2wd, 5.3 does the same, 1/2 quart after 1000 to 1500 miles, then the other half close to 3000, I thought it might be just durning break in, but its been that way up till now at 65000, and thats being easy on it most of the time, I also have a 1999 Chevy Venture van, piece of junk by the way, but its 3.4 v6 may use just 1/2 quart closer to 4000 miles and thats at 70 o 80 mph, plus alot of starting and stopping, I may try some synthetic oil to see if any different. Jackski
Friday, February 29th, 2008 AT 6:45 PM