I want to suggest Chrome Circle by Mercedes Lackey & Larry Dixon.
It has a half kitsune, half dragon antagonist and a cocky mage that drives a Mustang Mark 1.
You should read Born to run First for background. No dragons, but you learn not to mess with an engineer.
Thankfully there is an omnibus of the two books. Chrome Borne.
Oh and Furrymuck is in Chrome Circle.