One or Three Oil-Change Packages with Multipoint Inspection at J&M Auto Center (Up to 67% Off)

Lawrenceville

118 Ratings

Value Discount You Save
$55 65% $36
Give as a Gift
Limited quantity available
Over 80 bought

In a Nutshell

Mechanic swaps out standard oil before inspecting the vehicle to ensure optimal performance & safety; oil filter included

The Fine Print

Promotional value expires 90 days after purchase. Amount paid never expires. Appointment required, same day appointments accepted. Limit 1 per person, may buy 1 additional as gift. Limit 1 per visit. Must use promotional value in 1 visit. Valid only for option purchased. All goods or services must be used by the same person. Valid for up to 5 quarts of standard oil. Synthetic oil and premium or cartridge filters available for additional charge. 3 oil change package must be redeemed within 180 days. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

Choose Between Two Options

  • $19 for One Oil Change with Multipoint Inspection ($55 value)
  • $55 for Three Oil Changes with Multipoint Inspection ($165 value)

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.

Motor-Oil Viscosity: A Slippery Subject

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.

J&M Auto Center

In business since 1998, J&M Auto Center prides itself on taking care of its longtime customers, whether they're in need a wheel alignment, oil change, or transmission repairs. Of course, with an array of services from emissions tests to brake tune-ups, there's plenty to tempt new clients in, too. Both regulars and first-timers can expect the utmost attention from friendly staff, who always strive to put the customer first.

Customer Reviews

118 Ratings

Great services!
Danielle W. · May 23, 2016
Good service
Sothen T. · March 23, 2016
Very honest, friendly and highly qualified mechanics !
Danielle · January 9, 2015
Merchant Location Map
  1. 1

    Lawrenceville

    693 Grayson Highway

    Lawrenceville, GA 30046

    +16784079904

    Get Directions

Services and accessories for the discerning gearhead
15% Bonus Savings
Get an extra 15% off local restaurants, spas, salons, and more to use within 48 hours of your Goods order! See details
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.
{}