Unlike pets and houseguests, vehicles don’t hold grudges after getting sprayed with a hose and locked outside the house. Thank understanding cars with today’s Groupon to Einstein's Oilery, with locations in Boise, Meridian, and Garden City. Choose between the following two options:

• For $28, you get a 'Nobel' full-service oil change using high-mileage oil (a $56.99 value).
• For $33, you get a 'Nobel' full-service oil change using full-synthetic oil (a $66.99 value).

The car-care specialists at Einstein's Oilery lovingly drain used engine lubricants before pristinely repouring soothing oil, all while treating drivers to amenities that spur onlookers into jealous fits of road rage. Automobiles logging more than 75,000 miles benefit from the high-mileage oil change, which conditions seals, prevents leaks, and gives seasoned motors the panache of a master rumba instructor at an amateur dance competition. Or extend engine life and fuel economy of a fresher vehicle with Einstein's full-synthetic oil change. Both options employ premium lubricants formulated to perform in extreme weather and to exceed warranty requirements.

Clients can remain in their cars while basking in such diversions as a free newspaper, free WiFi, and a choice of beverage, while televisions afford drivers an over-the-shoulder view of technicians coddling car parts. Einstein's car curators demonstrate consideration for the environment by recycling all used oil. They also refill fluids and tires for free within three months or 3,000 miles of every Einstein's service, so road trips and cross-country grocery-store marathons can be conducted with impunity.