Enterprise Rent-A-Car, Las Vegas

Motorists can treat their hacking and wheezing motorcar to a trio of oil changes at eOilChange.com's participating auto shops. During each 30-minute service, skilled technicians replace used motor oil with up to 6 quarts of standard engine juice and install a new oil filter to ensure vehicles' veins pump clean, contaminant-free oil. Most autos are welcome, save trucks that weigh more than one ton, and all three services must be performed on the same vehicle. Drivers have 365 days to use all three oil changes at a single location, which means cars won't need to suck fresh oil from vulnerable pump jacks for at least a year.