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 $30, you get an oil change, a wheel balance, and a tire rotation at Chelmont Auto Center Inc. (a $69.90 value).

A crew of oil-change specialists replaces the blackened bile of an auto's liver with a flood of automotive ambrosia, after which trained tire technicians adjust the wheels to make sure future journeys stay on track. The standard oil change takes place in a garage graced with modern equipment and computerized gear to assist mechanics in their grease-laden efforts. Your engine will whir and chirp with delight as the crew decants an up to five-quart deluge of standard oil to maximize its fuel economy and keep its pistons pumping in prime condition. A wheel-balancing service hammers out the uneven crags and miniature mountain ranges that have sprouted up on tires, ensuring that wheels resemble well-crafted wedding rings for giant robot spouses. A tire rotation moves and twists wheels to even out their wear over time. A six-month or 6,000-mile warranty is included with every service package, and customers who encounter any service-related issues during this time may return for complimentary labor.

Technicians will complete all services in an hour or less while auto owners refresh themselves with water and soft drinks in a comfortable waiting room. An accredited female-friendly business with a slew of technical tricks up its oily sleeves, Chelmont Auto Center Inc. also provides brake services, auto diagnostics, and plutonium refills for DeLoreans stranded in time.