i don't know if its a canadian thing or not, but new or used, as long as its at a dealer, i've always put down the maximum amount i could on credit card. between 1000 (chrysler) and 2500 on a used murano for my ex (hyundai). never a complaint. they've always given me the option to put the amount into the financing and get the cc charge reversed by them, or leave it towards the down payment. and never have they wanted to add a charge for it. we're talking 500 to 1000 usually on a 25K plus vehicle. i can't see why they would complain except if you try to do it with an amex. i had a boss one time who had as part of his deal a 90,000 limit per year amex credit card. Not for expenses. And he could use it for anything he liked it (he was a diabetic and had a bar fridge at work and used to order in groceries for his fridge on his card). One year he bought a new vette worth 70 odd thousand dollars with it and they took it.
