Two Synthetic or Diesel-Truck Oil Change Packages at Keller's Professional Auto Service (Up to 86% Off)

Multiple Locations

90% of 10 customers

Give as a Gift
Over 210 bought
Limited quantity available

In a Nutshell

ASE-certified techs change out synthetic and diesel-truck oil and include tire rotation, brake inspection, window washing, and much more

The Fine Print

Expires 90 days after purchase. Limit 1 per person, may buy 1 additional as gift. Valid only for option purchased. Limit 1 per visit. Appointment required. 24-hr cancellation notice required. Valid over two cars. Must activate Groupon 3 months from purchase date; remaining oil change valid 6 months from activation date. Valid only for up to 5qts of Peak Performance synthetic blend oil OR up to 12 qts of Conoco Phillips C-J4 oil depending on option purchased. Valid at Aurora, Centennial and Parker locations. Extra fee for synthetic oil. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

Choose Between Two Options

$19 for two full-service oil change packages with peak-performance synthetic-blend oil and premium filter; up to 5 quarts of 5w-20 or 5w-30 (a $140 value)
$79 for two full-service diesel-truck oil change packages with Conoco Phillips CJ4 oil and premium filter; up to 12 quarts of 15w-40 (a $180 value)

Both oil change packages include:

  • Tire rotation
  • Check for leaks
  • Top off fluids
  • Inspection of brakes, suspension, battery, and air filter
  • Complete safety inspection
  • Wash of exterior windows

Before the invention of synthetic motor oil in the 1930s, machinery was protected with not only petroleum, but also rendered fat, vegetable oil, and even whale oil. Read on to learn how synthetic oil got cars moving more efficiently.

Synthetic Oil: Sending Petroleum the Way of the Dinosaurs

The widespread use of synthetic oils began in World War II, when massive tanks and jet fighter planes required a source of oil not tied to strategic regions in enemy hands. Under the high heat of a jet turbine or the bitter cold of a winter battlefield, naturally-derived lubricating compounds could fail or freeze, but impurity-free, manmade oils churned along, and are currently capable of keeping a car's moving parts humming for up to 7,000 miles between changes.

As with many aspects of car maintenance, the use of synthetic oil in engines is a source of fierce debate among auto enthusiasts. Before the invention of synthetic motor oil in the 1930s, machinery was protected with not only petroleum, but also rendered fat, vegetable oil, and even whale oil. Some tinkerers fervently tout the superiority of naturally derived lubricants, citing synthetic's relatively high cost or the tendency for early manmade compounds to leak. However, Popular Mechanics insists that modern synthetic oils run perfectly fine in most vehicles. Provided they refrain from loading up high-mileage or older vehicles with fully synthetic blends, car owners using synthetic motor oil may rest assured that their pistons are churning away safely and securely, without the help of dead dinosaurs or rendered whales.

  1. 1

    Aurora

    18385 E Girard Ave

    Unit A

    Aurora, Colorado 80013

    303-343-9200

    Get Directions
  2. 2

    Centennial

    5646 South Gibraltar Way

    Centennial, Colorado 80015

    720-876-1111

    Get Directions
  3. 3

    Parker

    10841 South Parker Road

    Parker, Colorado 80134

    303-840-7500

    Get Directions

For those who strive to keep their car looking good and running well