All reviews are from people who have redeemed deals with this merchant.
January 23, 2015
August 13, 2015
July 29, 2015
What You'll Get
Choose Between Two Options
- $22 for an oil change with inspection and tire rotation ($45 value)
- $65 for three oil changes with inspection and tire rotation ($135 value)
Internal-Combustion Engines: The Muscle in a Muscle Car
An oil change keeps all the parts of an engine moving smoothly. Peek under the hood with us to see why they need constant lubrication.
Beneath the guttural rumble of a car engine is an incredible amount of force. As soon as you step on the gas, fuel vapor mixed with air begins exploding, driving metal pistons in and out of chambers where temperatures regularly hit 3,000 degrees Fahrenheit. This enclosed system of pistons propelled by direct contact with burning gas defines an internal-combustion engine. (There is such a thing as an external-combustion engine, in which the heat is produced from outside the cylinder—as in the old-fashioned steam engines that people in the past used to make trains look extra friendly, for instance.)
The internal-combustion engine under the hood of the typical car completes its cycle in four stages, or strokes. First, fuel and air fill the cylinder as the piston drops. As the piston returns to the top of the cylinder, it (2) compresses the fuel mixture before (3) a spark from the spark plug ignites the mixture, the force of the explosion pressing the piston back down. Finally, the cylinder rises once more to push out the exhaust. As the crankshaft at the base of the pistons is kept turning by this constant cycle, it drives the rotation of the transmission, which applies all that power in a controlled fashion to the axles and, finally, sends you speeding down the road.
The Fine Print
Promotional value expires 90 days after purchase. Amount paid never expires. Merchant's standard cancellation policy applies (any fees not to exceed Groupon price). Limit 1 per person, may buy 1 additional as gift. Limit 1 per visit. Limit 1 per household. Must use promotion value in 1 visit. Valid only for option purchased. All goods or services must be used by the same person. Does not include hazard fee of $3.00. Extra fee for cartridge style filters. Conventional oil only. Up to 5 quarts. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.