MYFICO.COM explains finance shopping here:
Research has indicated that FICO Scores are more predictive when they treat loans that commonly involve rate-shopping, such as mortgage, auto and student loans, in a different way. For these types of loans, FICO Scores ignore inquiries made in the 30 days prior to scoring. So, if you find a loan within 30 days, the inquiries won't affect your scores while you're rate shopping. In addition, FICO Scores look on your credit report for rate-shopping inquiries older than 30 days. If your FICO Scores find some, your scores will consider inquiries that fall in a typical shopping period as just one inquiry.
For FICO Scores calculated from older versions of the scoring formula, this shopping period is any 14-day span. For FICO Scores calculated from the newest versions of the scoring formula, this shopping period is any 45-day span. Each lender chooses which version of the FICO scoring formula it wants the credit reporting agency to use to calculate your FICO Scores.