Chrysler, GM, and Ford. I've worked for all 3 and they all have service bulletins stating something to that effect. Before an oil consumption test is done during warranty it's usually shown to the customer an FYI. I find it to be a crock of $h!t but it is what it is.
EDIT-it has changed several times over the years back and forth between 1 qt every 1k to 2k miles. Currently I think they say 1k.