AAA's analysis covers vehicles equipped with standard and optional equipment including automatic transmission, air conditioning, power steering, anti-lock brakes and cruise control, to name a few.

Fuel
Fuel costs are based on $2.941 per gallon, the late-2007 U.S. price from AAA's Fuel Gauge Report: www.fuelgaugereport.com. Fuel mileage is based on Environmental Protection Agency fuel-economy ratings, weighed 60 percent city and 40 percent highway driving.

Maintenance
Costs include retail parts and labor for normal, routine maintenance as specified by the vehicle manufacturer. They also include price of a comprehensive extended warranty with one warranty deductible of $100 and other wear-and-tear items that can be expected to require service during five years of operating the vehicle. Sales tax is included on a national average basis.

Tires
Costs are based on the price of one set of replacement tires of the same quality, size and rating as those that came with the vehicle. Mounting, balancing and sales tax are also included.

Insurance
AAA based its insurance costs on a full-coverage policy for a married 47-year-old male with a good driving record living in a small city and commuting three to 10 miles daily to work. The policy includes $100,000/$300,000 coverage with $500 deductible for collision coverage and a $100 deductible for comprehensive coverage.

License, Registration and Taxes
Costs include all governmental taxes and fees payable at time of purchase, as well as fees due each year to keep the vehicle licensed and registered. Costs are computed on a national average basis.

Depreciation
Depreciation is based on the difference between new-vehicle purchase price and its estimated trade-in value at the end of five years.

Finance
Costs are based on five-year loan at 6 percent interest with a 10 percent down payment. The loan amount includes taxes and the first year's license fees, both computed on a national average basis.

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