ryanzzz28

what is the normal oil consumption for an LS1. im an LT1 guy, and mine doesnt burn any whatsoever, but my buddy is getting kinda worrried in his 01' Z28. He says that he has been burning 1 quart per 1000 miles for quite some time now. and just last week he burned 1 quart after just 500 miles. is this normal, or what could be the cause.
P.S. : his car has full exhaust/intake as well as custom programming.

any help would be appreciated.
Ryan