I see "liter" spelled "litre" on the back of old Jeep Cherokees. Can't get a more American car than that, wonder why they did it.
I do have a question though. When trying to make a product name plural (a proper noun), the same rule applies, (add an "s" or "es") yet with the ending, the word is changed. Especially here, it is hard with cars. What's more than one "X5"? "X5s"? (There could easily be a model named the "X5s"). More than one 4.8is? 4.8ises?
