That's madder than Jessica Christ reciting Rawlinson End backwards on a pirouetting clockwork banana donkey.
You're talking about an oil tank for home heating?
Yep. Your analogy is perfect 😆.
To add to it, the damn furnace stopped working on a night when the temp went down to -13, so there we were in a freezing house with a useless tankful of liquid gold in the basement. Sometimes all you can do is laugh (while crying inside I suppose).