Letting oil tank on empty when they move in?

[Jimmy S.]

In the past I have always made sure its about 1/4 full or more when they moved in and needed to be left at that level when moving out. Well 9 out of 10 times they use every drop left and its empty when they move out and I always seem to get burned.

How does everyone else do it?

Is it a bad way to start with a new tenant leaving the tank on almost empty and them having to get oil right away when they move in, that way it is theirs. 

thanks