Oil Change Service StationAuto Repair ShopBrake ShopAuto MaintenanceAlternator Repair
Located at 12060 Colorado Blvd, Thornton, CO, Grease Monkey Oil Changes & More offers reliable automotive care with full-service oil changes, fluid exchanges, and preventive maintenance. Our center is conveniently near Thornton Town Center and Carpenter Park, making it easy to get your vehicle serviced while you handle errands or enjoy the outdoors. Visit us for professional and swift service.
Many customers praised the quick and efficient service, often noting they were in and out in under 20 minutes.
Customer Service
The staff received high marks for being friendly, knowledgeable, and professional, contributing to a positive customer experience.
Pricing Concerns
Some customers expressed dissatisfaction with pricing, feeling that certain services were overpriced or that they were upsold on unnecessary services.
Quality Issues
A few reviews highlighted concerns about the quality of service, including improper oil changes and lack of follow-up on service issues.
MD
Morgan Dechant
2 days ago
1.0
We took our car in because the check‑engine light came on, and the engine code suggested trying an oil change. When we arrived, they immediately began insisting the engine had been rebuilt, calling the car a lemon, and claiming there were leaks everywhere. They then started filling the engine with oil far beyond the recommended 4.2 quarts—reaching nearly 9 quarts on a small Hyundai. We had to stop them because they kept saying the dipstick was dry. We asked them to verify the correct dipstick length, but they couldn’t find the information; we located it with a simple Google search.
They caused a huge amount of unnecessary stress by making it seem like the engine was ruined, when the real issue was simply that the wrong dipstick had been used. The car is now completely fine—replacing the dipstick was all it needed and the check engine light went away. We also confirmed with the dealership that the engine is factory‑original and has never been replaced, despite the mechanic at Grease Monkey insisting it had been because he “has rebuilt engines for years.”
SD
Seriah Delaney
5 days ago
5.0
Took less than 15 minutes for them to do my oil change and air filter, great service, showed me everything they were doing 👍🏽
ME
Marlene Enny
Feb 20, 2026
1.0
Friendly: yes
Add items not reviewed and charged for: yes
$20 additive (since my coupon was $20 that made it ok?
Told me this is the typical price:
$50 for a filter that is $19 online
$30 for a filter that is $8.00 online
Honesty is most important and that did not happen!
NM
Natalia Morales-McCormick
Feb 9, 2026
5.0
Big shoutout to Grease Monkey! 🚗💨
I don't mind paying a premium when the service is this efficient. They are consistently courteous and lightning-fast—I’m usually back on the road in under 30 minutes! For a busy professional, that kind of reliability is priceless. Highly recommend them for anyone who values their time as much as their car!
RT
Rebecca Trujillo
Feb 8, 2026
1.0
Do not go here. The management and higher (corporate) do not care about their quality of work and discount your obvious issues. We went in October for an oil change, the tech suggested we do an engine flush as well, given we hadn’t done one, we thought what harm could it do? It would just be even better for the car right? Well, something went completely wrong. 8 days later, after only driving it twice, our car started smoking. Turns out it was a complete turbo failure - a $7500 price tag. I file a claim with Grease Monkey and the response I get is the store manager walking into the repair shop we had the car at off the bat saying “yeah, we’re probably not covering this”, the regional manager and store manager taking WEEKS to call me back with no updates, and their corporate number being a trash voicemail that no one calls you back for either. Once the repair shop we got it to started doing the repair they said the oil looks like complete crap. (We didn’t even tell them about what happened before the turbo game) Odd… only driving it twice after an oil change and engine flush, the oil is crap? There’s no reason it should be looking like that if it was done properly and to quality.
If you’re wondering why I’m posting this now it’s because we hadn’t been able to start the repair until now. $7500 is not something anyone can come up with right away.
What types of vehicle maintenance services does Grease Monkey in Thornton, CO offer?
Grease Monkey provides oil changes, fluid exchanges, brake services, alternator repair, and general auto maintenance and repair.
What are the operating hours of Grease Monkey at 12060 Colorado Blvd, Thornton?
Open Monday to Friday from 7:30 AM to 7:00 PM, Saturday from 7:30 AM to 6:00 PM, and Sunday from 10:00 AM to 4:00 PM. Closed on November 27, 2025, and December 25, 2025 for holidays.
Can I get my vehicle serviced quickly at Grease Monkey in Thornton?
Yes, Grease Monkey’s certified pit crew team is knowledgeable, friendly, and offers fast service with their slogan Done Fast. Done Right.™
How can I contact Grease Monkey in Thornton for service appointments?
You can call them at +1 303-280-0235 or email retail9@greasemonkeyintl.com, aaguilar@fullspeedautomotive.com, or cshelley@fullspeedautomotive.com.
Where exactly is Grease Monkey located in Thornton?
Grease Monkey is located at 12060 Colorado Blvd, Thornton, CO 80241, USA.
What nearby places can I visit before or after getting my vehicle serviced at Grease Monkey?
You can visit Thornton Town Center for shopping, enjoy outdoor time at Carpenter Park, grab a meal at Subway, or check out nearby entertainment like JNJ Comic Books and Games or 9Round Fitness.
Are there any dining options close to Grease Monkey in Thornton?
Yes, nearby dining includes Subway sandwich shop, Sliceworks pizza restaurant, Roma pub, Yonsei sushi restaurant, and Sushi Tokoro.
What financial services are available near Grease Monkey?
Nearby financial services include WELLS FARGO BANK and Wells Fargo Home Mortgage for banking and mortgage needs.
Are there health and wellness services near Grease Monkey in Thornton?
Yes, nearby health services include Platte Valley Medical Clinic, Appletree Dental, Mission Trace Chiropractic, UCHealth hospital, and Energy Endeavor holistic spa.
Does Grease Monkey face competition from other auto service centers nearby?
Yes, competitors include Valvoline, Jiffy Lube, Take5, Midas, and Express Oil, which also provide automotive oil change and repair services.
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