Limit 1 per person, may buy 1 additional as gift. Valid only for option purchased. Limit 1 per visit....
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Limit 1 per person, may buy 1 additional as gift. Valid only for option purchased. Limit 1 per visit. Appointment required. Full service oil and filter change includes up to 5 quarts of conventional motor oil and new filter. Additional fee for diesels, canister, specialty filters, and TPMS reset (if needed). Valid for 10w30 synthetic blend motor oil. Synthetic and high-mileage motor oil available for additional cost. Not valid with other offers. Mandatory $3 disposal fee per oil change. Limit: Up to 3 oil changes for 12 months.
Technicians keep cars roadworthy with an oil change and tire rotation
The Deal
- $15.75 for an oil change with a tire inspection and tire rotation ($50 value)
Motor-Oil Viscosity: A Slippery Subject
The oil viscosity
your car needs is usually determined by your car’s manufacturer, but is
there ever a reason to switch? Groupon sought out the answer.
Whenever
a vehicle is in motion, engine oil has a lot of work to do: reducing
friction between moving parts, keeping the engine from overheating,
preventing components from prematurely wearing down. But there are many
things that can keep oil from staying on top of its workload, and that’s
where viscosity comes into play. Factors such as varying starting and
running temperatures, an aging car, or heavy loads on board can all
affect how motor oil performs. Fortunately, auto manufacturers specify
what viscosity level is best for their vehicles, so most drivers never
have to spend much time pondering this subject. But for those who are
interested or who have to make elevator conversation with a talking car,
there are a few basic principles to consider.
Like most liquids,
when oil is cooler it’s more viscous (that is, slower-flowing), and
when it’s warmer it’s less viscous. Higher-viscosity oils are most
appropriate for cars that operate at higher temperatures or carry
heavier loads. Lower-viscosity oils work better at lower temperatures
since they don’t need to be heated to flow, but they generally offer
less protection against wear.
There was a time when people who
live in four-season climates would use one oil with a higher viscosity
during the warm months and another during the cold months, but
multi-grade motor oils solve that problem by working efficiently in both
conditions. When you see a viscosity grade on a bottle of multi-grade
motor oil—say, 10W-30—there are two numbers to consider. The number
preceding the W stands for "winter" or "woolen-underwear season," which
reflects how the oil flows when starting an engine on a cold day. The
number after the hyphen is the viscosity at 210°F, the standard
temperature of an operating engine. (On both sides of the hyphen, a
higher number means a higher viscosity.) What makes this type of oil so
flexible? It’s the polymers—particles that expand as the oil heats up
and slow down the rate at which the oil thins as it gets hotter.