One or Three Oil Changes or One Engine Diagnostic at Walnut Creek Auto Clinic (Up to 65% Off)


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Up to 65% Off

Customer Reviews

7 Ratings

Excellent,attentive and very friendly customer service.Fully explain why and what needs to be done at a reasonable price,it's a definite smart choice
Michael G. · March 21, 2017
Merchant replied
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Thank you so much for your feedback! We look forward to assisting you in the future with your automotive needs!
Merchant replied · March 24, 2017
Good service. Quick. Great price! Respectful owner and service.
ARUL S. · December 4, 2016
Merchant replied
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Thank you so for your feedback! We appreciate your business and look forward for the opportunity to assist you in the future on all your automotive needs.
Merchant replied · December 12, 2016

What You'll Get

Choose from Three Options

  • $40 for one full synthetic oil change up to five quarts ($99 value)
  • $105 for three full synthetic oil changes up to five quarts for each service ($297 value)
  • $49 for one computerized engine diagnostic ($99 value)
Oil Changes Include an Inspection/Re-fill of:
  • Anti-freeze/coolant reservoir levels
  • Engine air filtration
  • Serpentine belts
  • Wiper blades
  • Exterior lights
  • Chasis (lubricate when applicable)
  • Tire pressure
  • Cabin air filter
  • Windshield wiper fluid
  • 5 Quarts of premium synthetic oil
  • Oil filter

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.

The Fine Print

Promotional value expires 120 days after purchase. Amount paid never expires. Limit 1 per person, may buy 1 additional as gift. Valid only for option purchased. All goods or services must be used by the same person. Extra fees will apply for oil change over 5 quarts. May be repurchased every 30 days. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

About Walnut Creek Auto Clinic

By purchasing this deal you'll unlock points which can be spent on discounts and rewards. Every 5,000 points can be redeemed for $5 Off your next purchase.