Here is a useful site for up-to-date currency information on 164 currencies, including Canadian against the US dollar.
http://www.oanda.com/convert/classic is used by corporations, tax authorities, auditing firms, and financial institutions.
When paying for a car purchase via a wire transfer from your financial institution, you will likely be charged a premium on these rates. There are currency trading institutions who will transfer your money at better rates than banks increasing your savings on your car purchase.
UCanImport will be adding information about these services in the near future so that you can be better informed on wire transfer possibilities.