Heavy-Duty Oil and Fluid Services in Phoenix, AZ
Clean, properly maintained fluids are critical to the health and performance of your truck’s systems. At Complete HTR, we perform professional oil and fluid services for heavy-duty trucks, trailers, buses, RVs, fleets, and construction equipment across the Phoenix area. From standard oil changes to differential fluid replacements, we keep your equipment running safely and efficiently.
Our oil and fluid services include:
- Engine oil and filter changes
- Transmission fluid and gear oil service
- Differential, axle, and hub oil changes
- Coolant system flushes and top-offs
- Power steering, brake, and DEF fluid service
- Complete fluid checks and leak inspections
We service all major makes and models using high-quality products that meet or exceed OEM specifications.
Why Choose Us?
At Complete HTR, our goal is to prevent major failures by keeping your vehicle’s fluids clean, full, and properly maintained.
- In-shop oil and fluid services for trucks, trailers, buses, and equipment
- Scheduled service plans available for fleets and commercial clients
- Synthetic and high-mileage oils available
- Full system inspections included with every service
- Mobile fluid checks and oil changes available within 50 miles of Phoenix
- Coffee and comfortable waiting area while your service is completed
- Pick-up and drop-off services available on request
Whether it’s routine maintenance or your next major service interval, we’ll get your vehicle in, out, and back on the road quickly.
Mobile Services and Roadside Assistance Within 50 Miles
Complete HTR offers scheduled mobile oil and fluid services within 50 miles of Phoenix, AZ. Ideal for fleet yards or work sites, our mobile technicians deliver on-location oil changes and fluid checks for your convenience.
Schedule Your Oil and Fluid Service Now: Call 623-745-5896!
Extend the life of your truck and avoid expensive repairs. Call 623-745-5896 now to schedule oil and fluid service with Complete HTR.
FAQs
What Areas Do You Serve?
We are located at 2450 S 7th Street Phoenix, AZ 85034 off the I-17 and 7th Street. We also proudly serve the greater Phoenix area, including Tempe, Glendale, Mesa, Scottsdale, Chandler, and more.
How Often Should I Change My Truck’s Fluids?
Engine oil should be changed every 10,000 to 15,000 miles depending on usage. Other fluids like transmission, differential, and coolant should follow manufacturer intervals or be checked during regular maintenance.
What Fluids Do You Check and Replace?
We check and service engine oil, transmission fluid, differential and axle oil, power steering fluid, coolant, DEF, and brake fluid. We also inspect for leaks and fluid quality during every service.
How Can I Get in Touch?
Call 623-745-5896. We’ll schedule your oil and fluid service—either in our Phoenix shop or at your location if you’re within 50 miles.
Don't Take our word for it.
Read Customer Testimonials.
"Great reliable truck repair and mobile work. Ivan and Adrain great service guys."
"Amazing customer service, fair pricing and quick in and out. Called first, made a same day appointment, was out in about 5 hours. I definitely recommend them for the truck driver in need of service."
"Had DEF pump replaced on one of our Freightliner Cascadias. Service was fast, friendly and very economical. Will recommend to others. Small but Great place who will treat you right!"
Contact Us
Let us know what is going on with your vehicle, and we will get back to you soon with a quote.