I say “Vahz” my other half says “Vayze.”
Vase.
Rhymes with face.
Honest question, feel silly for asking… Is it now, the “King’s English”?
To the main question: Here in Michigan, I’ve only heard Vace and Vah-zeh. There’s not even an R in there, so I can’t get it to rhyme with Mars at all.
Most English and Welsh accents are “non-rhotic” meaning they don’t pronounce "r"s and would pronounce “Mars” as “mahs”.
I’m from Ireland which does have rhotic accents, along with Scotland. I’m mostly used to hearing the English accents but occasionally it does lead to fun misunderstandings like hearing “carving” as “calving”.
Really? What reason could stand at the base of of your pronunciation? Can you provide even a single case where someone would lose face to embrace pronouncing it with such disgrace? I have half a mind to chase you away from this place. Or at the very least replace or erase you from this sharing space.