The purpose of the Gas Log is to record vehicle mileage and fuel expense. Includes sections for Annual and 52 weekly mileage totals. Fill in your Odometer Start and Stop to record miles traveled. The weekly log includes a place to record the purpose or destination of miles traveled. Enter weekly totals on the Annual Totals page. The Gas Log includes sections to record the date of fuel purchase, miles traveled since last fueling, cost of fuel and miles per gallon. The Gas log is a detailed and convenient record to review fuel and mileage data for tax or business reporting!