Ehh... forgive a poor Swedish slob here, but what's wrong with "oh sugar"?
There's nothing wrong with that expression, actually. As you probably already know, it's used instead of a different S word sometimes, and at least where I live, usually by elderly women who are more genteel. I was just stating that, while I didn't find it offensive, I would feel like my grandmother if I used that expression.
Sorry for the confusion there
