My range is flat but not level. Slopes a little to the front.
The range was close enough when I first put it in the alcove. Over the last 6 (?) years the floor seems to have settled. The floor is 3/4 T&G with 1/2 BC on top (as is the whole house) with 0.060 stainless sheet on top. But the thing weighs more or less 500 pounds and the back wheels are over the girder. I havent checked to see if the floor under the front wheels is bowed between the joists, and where the front wheels line up with the joists.
The bowed floor or joists taking a set is something I'll have to check before putting down the tile (no hurry there, I did say it's been a couple of years! L ). If the floors bowing I'll have to jack it back to flat and install 2x6 and hanger reinforcements. If the joist has taken it's set (I don't think so but it Is possible) I'll have to level it with a leveling compound ("cement") before putting down the cement board.
Boy, isn't that a heck of an answer to 'is your stove level'?