Oil & Fluid


Keep your trucks running smoothly with RTC's oil and fluid services. We specialize in expert oil and fluid services for heavy, medium, and light-duty trucks. You can count on us to keep your vehicles in prime condition for the long road ahead.

Contact Us

Oil and Fluid Services

Oil Change and Filter Replacement: Our technicians perform thorough oil changes, ensuring your engine receives the right lubrication for maximum efficiency. We also replace filters to maintain clean oil circulation and protect vital engine components.

Transmission Fluid Flush: Over time, transmission fluid can accumulate contaminants, affecting performance. Our fluid flush service removes old fluid and replaces it with fresh, ensuring smooth gear shifts and prolonged transmission life.

Coolant System Inspection and Top-Up: A well-maintained coolant system is essential for preventing engine overheating. Our services include inspections for leaks, proper fluid levels, and topping up coolant to safeguard your heavy-duty truck against temperature-related issues.

Differential Fluid Replacement: Our technicians replace old and contaminated differential fluid, promoting optimal performance and preventing premature wear on differential components.

Power Steering Fluid Service: Our fluid service includes checking for leaks, flushing old fluid, and ensuring your power steering system operates smoothly, preventing steering issues down the road.

How Often Should I Change My Truck's Oil?

For heavy-duty trucks, it's generally recommended to change the oil every 15,000 to 25,000 miles, depending on factors like engine type, driving conditions, and manufacturer guidelines. Regular oil changes are essential for engine longevity and optimal performance.

Is Synthetic Oil Better for Semi Trucks?

Yes, synthetic oil is preferable for semi-trucks. It offers enhanced durability, stability at high temperatures, and better protection against engine wear. Synthetic oil's superior performance makes it an excellent choice for heavy-duty applications, ensuring a smoother and more efficient engine operation.

Reach Out Today

Elevate your heavy-duty truck's performance with RTC's top-notch oil and fluid services. If you're due for an oil change, fluid top-up, or any other maintenance, don't hesitate to reach out. Contact RTC today to schedule services that keep your fleet running at peak efficiency.

Areas We Serve

At RTC, we proudly extend a 100-mile radius of each of our shop locations.

  • Redmond, Oregon
  • Burlington, Wisconsin
  • Birmingham, Alabama
  • Portland, Oregon (Mobile Services Only)
  • Vancouver, Washington (Mobile Services Only)

For those located in these areas, you can count on our 24/7 mobile services.

our repairs

Full-Service Repair Shop

At RTC, our repair services go beyond just fixing issues – we prioritize the safety and efficiency of your fleet. We're here to ensure confidence in your vehicle's. Trust us for all your truck repair maintenance needs.

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Axle Repair

Our repair services will enhance safety and improve efficiency on the road. Trust us for axle solutions that keep your trucks moving.

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Brake Repair

We're here to ensure confidence in your vehicle's stopping abilities. Trust us for all your truck brake maintenance needs.

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Coolant System Repair

We tailor services to ensure the longevity of your trucks. See how our coolant services can help boost your business.

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Performance ECM Tuning

Experience enhanced power, efficiency, and overall performance as we optimize your truck's engine to deliver peak performance.

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Diagnostics & Electrical Repair

From battery replacements to alternator repairs, we will keep your vehicles powered and illuminated.

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Driveline Repair

We specialize in prolonging the lifespan of your driveline components, ensuring your trucks operate with precision.

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Our EGR (Exhaust Gas Recirculation) and DPF (Diesel Particulate Filter) repairs ensure optimal performance of these components.

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Engine Repair, Rebuild, Overhaul & Conversion

From repairs to rebuilds, overhauls to conversions, we excel at diesel engine maintenance.

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Exhaust System Repair

Our exhaust system repairs & services go beyond mere maintenance—they ensure your fleet runs cleaner & more efficiently.

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HVAC System Repair

RTC is your trusted partner in maintaining a comfortable and efficient environment within your heavy-duty truck.

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Oil & Fluid

We specialize in expert oil and fluid services for heavy, medium, and light-duty trucks, ensuring peak performance.

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Suspension Repair

At RTC, we specialize in enhancing the performance and safety of heavy-duty, medium-duty, and light-duty trucks.

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Transmission & Clutch Repair

Our team provides comprehensive solutions for heavy-duty, medium-duty, and light-duty trucks.


customer insights

Great Company!  Experienced drivers and good communication . I hope we will continue to work together many many times . Thanks especially to Bill.  //  CARS HAULER


5 stars

"Great company with a diverse fleet to meet all your shipping and transportation needs."


5 stars

"Great company with outstanding leadership."


5 stars

"5 star! "

our locations


With our commitment to excellence and years of industry experience, you can trust us to deliver top-notch service and support no matter the location. Whether you're in need of routine maintenance or emergency repairs, our vast network ensures that help is never far away.