If Dorothy had never changed the Tin Man's oil, the Wizard probably would have just thrown away his spare heart. Show your car you have a heart with today's Groupon: for $50, you get a "Ready for Winter" tune up package (a $102.95 value) at Valvoline Instant Oil Change, which has three Omaha locations on 108th street, 132nd street, and at 137th and Millard.

Get a car classy in time for rolled-up-window weather with the full-service treatment, including up to five quarts of Valvoline oil (a $37.99 value), a new air filter (a $14.99 value), and vehicle lubrication of chassis components to prevent chassis chafing (if needed). While the full-service change also includes a complete examination of everything from tire pressure to transfer-case fluid, the ready for winter package comes with additional seasonally specific spruces such as a clean air filter and a brand new pair of wiper blades (a $19.99 value), handy for deflecting rabid snowflakes and discouraging would-be abominable carjackers. A battery check service (a $19.99 value) ensures riders are ready to go dashing through the snow, while a gas cleaner (a $9.99 value) puts the finishing touch on a newly winter-proofed chariot. Customers can pay the difference for any excess quarts of oil or certain replacement filters and wiper blades, while European cars will be charged $10 extra due to time spent overcoming locomotive language barriers.

Like ice-cream cones lost in the desert, library books, and summer romances, automobile performance comes attached to a ticking expiration date. Cross off this bold-faced to-do-list item with the help of a trusted oil brand, and mechanics with more than 20 years of oil-swapping experience.