Pistons and shafts overheat and seize up unless protected by a slick, shiny coating of oil, just like classical Greco-Roman wrestlers. Keep your engine parts from throttling each other with today's Groupon: for $29, you get an oil change, tire rotation, wiper blades, and a 41-point courtesy safety inspection (a $99 value) at one of the following four Car-X Auto Service Des Moines–area locations: Southeast 14th Street, Merle Hay Road, Northeast 14th Street, or South Duff Avenue in Ames.

Without routine oil changes, vital engine parts will begin to erode from the incredible heat and friction of the internal combustion power. A Car-X oil change swaps out filthy used oil and clogged filters with up to six quarts of shiny new Valvoline oil and a ripe, juicy new oil filter. To keep your chariot of controlled fiery explosions running smoothly, mechanics rotate the tires, ensuring more even wear and better handling, and slip off used-up wiper blades and replace them with new vision-clearers (up to 28"). To check, double-check, and 41st check your vehicle, Car-X performs a free 41-point safety check on each oil-transfusion recipient, certifying that each iron roadhorse is healthy and able to happily transport your most precious internal-organ cargo.

Groupon holders who have diesel engines or who wish to put semi-synthetic or full-synthetic oil in their cars may apply the value of this Groupon to these higher-priced services.