In the mid 90s I was a product engineer with GMC Truck. Anything up to 1 quart per 1000 miles was considered acceptable. Policy was not to replace engines unless they used more than that.
As noted earlier, all engines burn some
oil.
With the above said. I would not be happy with the amount of
oil consumption you have. I would expect no more than 1/2 quart per 3000 miles of normal street use. Hard use should burn more
oil.
John