I don't. I usually say 42 and wait to see the reaction on people's faces. Cracks me up everytime.I'm batting for the other team on this one. As an American, I've always said & written "aluminum", but "aluminium" always sounded more right. 'Cause of it being a metal and all.
The REAL question people are afraid to ask is, how do you pronounce "Molybdenum"?