Oil & Fluid Service · Clarksville, TN

Oil & Fluid Service in Clarksville, TN

Call (931) 561-7736 Request service

Based in Russellville, KY · 75-mile radius

Symptoms we look for

You hear
  • · Top-end noise on cold start (oil pressure low or wrong viscosity)
  • · Whining transmission (low or contaminated fluid)
  • · Hydraulic pump whine (low fluid)
You see
  • · Oil leak under truck
  • · Glittering metal in differential or transmission oil
  • · Coolant in oil (engine internal failure — not a fluid service issue)
  • · Hydraulic fluid foaming
You smell
  • · Burnt transmission fluid
  • · Burnt oil from a leak hitting a hot manifold

How we'd handle this for Clarksville, TN

Oil and fluid service sounds simple but the details matter. Wrong oil viscosity in a Cummins ISX12 will trigger sensor codes and shorten engine life. Wrong gear oil in a Dana drive axle eats bearings. We track filter PNs and fluid specs per unit for fleet customers so the right thing goes back in. We also do a full visual inspection on every service — looking for leaks, worn hoses, frayed wiring, brake-system anomalies. If we see something, we tell you. No pile-on parts though — you decide what gets fixed when.

Coverage to Clarksville: about 75 minutes via I-24. Landmarks we work near include Fort Campbell south gates, APSU campus, I-24 exits 4-11. We give you a real arrival window when you call (931) 561-7736.

What we cover

  • Engine oil and filter change to OEM spec
  • Fuel filter replacement (primary and secondary)
  • Coolant filter (where fitted) and SCA test
  • Transmission fluid and filter (manual or automated manual)
  • Differential oil (drive axle and trailer axle)
  • Hydraulic system fluid (PTO-driven equipment, dump trucks, etc.)
  • Power steering fluid and filter
  • Fluid leak diagnosis as part of every service visit

Parts & warranty

Engine oils from Mobil Delvac, Shell Rotella, Detroit Diesel Power Service in the spec your engine maker requires. Filters Donaldson, Fleetguard, Baldwin, Wix. Transmission and differential lubes per OEM spec (Eaton, Dana, Meritor approved fluids). 1-year warranty on the service work; fluid quality warranties pass through from the suppliers.

Related services

Oil & Fluid Service in nearby cities

Same crew, same warranty, same arrival-window honesty in the next towns over.

Other repairs we handle in Clarksville

Request service

Request oil & fluid service in Clarksville, TN

Tell us what's going on and we'll call you back. For roadside emergencies, the fastest path is to call (931) 561-7736.

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Frequently asked

Do you cover Clarksville on roadside calls?
Yes — Clarksville is well inside our 75-mile mobile radius. About 75 minutes via I-24, the route runs along I-24. Call (931) 561-7736 and we'll give you the real ETA.
How often should I change oil on a Class 8?
OEM intervals are typically 25,000–35,000 miles for over-the-road. Vocational and stop-and-go duty cycles need shorter intervals. We can do an oil sample to recommend a custom interval for your specific operation.
Can you do oil samples and analysis?
Yes. We pull the sample at oil change, send it to a lab, and you get a report on wear metals, fuel dilution, soot loading, and TBN/TAN reserves. Useful for fleets dialing in PM intervals and for diagnosing low-grade engine issues.
Do you carry stock of the major oil brands?
Yes. Mobil Delvac, Shell Rotella, Detroit Diesel Power Service, Cummins Valvoline Premium Blue. We don't substitute brands or grades without telling you.
What does a full oil service cost?
Engine oil and filter on a Class 8 typically lands $450–$650 depending on capacity and filter spec. Adding fuel filters and other PM items takes it higher. We give a firm number when we know your engine and what filters you take.

What customers say

4.7 / 5 from 43 Google reviews

  • “Brennan was great — absolutely hire this guy. I own a local tree company in Goodlettsville and one of my work trucks broke down at short notice. He was able to get there within a day or two and diagnose it. My turbo went out on one of my vehicles — when I went to the dealership they told me the wait time was forever and the process would include taking the cab off, which wouldn't work well with my current setup. Within one day he was able to replace my turbo and get it running so I could get back in business. The job was really labor-intensive but he made quick work of it and it runs even better than it did before. He's now the main guy I go to.”

    — Tyler M.

  • “We've used Blacktop Mobile Repair twice this month, and both experiences have been nothing short of amazing. They run a top-notch operation, and it really shows in the quality of service and professionalism they provide. Jacob, the service tech, went above and beyond to make sure our truck was taken care of. He even drove out of his way to make sure he had the exact part needed to fix the truck and get us back on the road quickly. That level of dedication and commitment is hard to find. As a trucking company, downtime is costly, and having a team like Brennan and Jacob we can rely on makes all the difference.”

    — Matthew P.

  • “I've used these guys in the past for an air compressor installation. Jacob was great. And recently my alternator quit on the weekend. I called Jacob on a Saturday and he helped me find one that I could pick up myself. Both times Jacob was knowledgeable & fair. A few months later — again on a Saturday — I wasn't even in their area and I called again to get troubleshooting advice. They are very good at diagnosing. Was able to pinpoint the trouble. Thanks again guys!”

    — Dennis W.

Read all 43 reviews on Google

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