I did the math a while back on maximum allowed consumption, and it was scary.
When you have to top off so much, it makes more sense just to replace the filter from time to time.
We definitely shouldn't have to even be having such discussions, what with these "high tech" "modern" cars. In 2012, we don't seem to have any better manufacturing tolerances than in the mid 70's.
I wonder if the epa has updated their oil consumption allowances for automakers since the days of Pintos and Vega's...