CarFax is all about the Vehicle History reports, which we cannot track. It gives preowned buyers the confidence to come in and make an offer on a preowned vehicle without necessarily submitting a lead.

The best way to measure the value of CarFax is to make sure that only the cost of listings is entered into the Ad Spends. Take a look at the closing rate for the leads that come in, and decide with the dealer if the cost per sale is appropriate for his or her needs.