The easiest way to find out is to go to Auto Zone or OReillys and ask them to give you the oil filter that goes on your car. They'll show you which one it is, and you can take it over to the section where they sell different size oil filter wrenches and compare the sizes of each wrench to the filter you've got in your hand. An oil filter wrench is just a handle grip with a round metal collar that wraps around the oil filter, so it will be very easy for you to tell which wrench is the right size just by comparing it to the filter. The metal collar on the correct wrench will only be a tad bit bigger than the oil filter itself so it can slip on easily and tighten quickly.
