Panasonic Toughbook showing engine and PTO diagnostic data

Preventive Maintenance

Preventive Maintenance — Mobile PM for Owner-Operators & Fleets

Based in Russellville, KY · 75-mile radius

What we cover

Engine oil + filter change (we use the spec your engine maker calls for)
Fuel filters (primary and secondary), coolant filters when fitted
Coolant test and top-off; SCA / extended-life additive as required
Drive axle and trailer axle lube
Brake adjustment check, slack-adjuster service
5th wheel grease and inspection
Full visual: lights, mirrors, tires, mudflaps, leaks, hoses, belts
Air dryer, governor, and dryer-cartridge schedule tracking
DOT-style inspection report written up and emailed

How we handle it

For one-off PMs you call, we book, we show up at your yard or wherever the truck lives, we do the work, we send the invoice and the inspection report. For fleet PMs (5+ trucks) we set up a recurring calendar matched to your mileage cadence — typically 25k miles for over-the-road, more often for vocational. You get one invoice a month, line-itemed by unit number, with the inspection reports attached as PDFs. We track filter PNs and oil specs per unit so you don't get a half-quart of the wrong-spec oil in a Cummins ISX12 because someone grabbed the wrong jug.

Parts & warranty

Filters, oils, and fluids come from quality suppliers — Donaldson, Fleetguard, Baldwin, Wix, Mobil Delvac, Shell Rotella, Detroit Diesel Power Service, depending on what the engine maker spec calls for. We don't substitute up or down on spec. Pricing is line-itemed on the invoice; we don't bury PM parts in a flat "PM package" rate that hides margin.

Related repairs

Other services

Book a slot

Call Brennan to lock in a window — most preventive maintenance jobs schedule same-week.

Call to schedule — (931) 561-7736

Callback

Request a callback

Not urgent. Brennan'll call you back at the time you pick.

Request service

Or send a quick note about preventive maintenance

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

Real work, real shop

Frequently asked

What does a basic PM cost on a Class 8?

We give you a firm number after we know the engine spec and what filters and oil the truck takes. Most basic PMs land in the $450–$650 range including parts. Fleet PMs on contract come in lower because we're set up for the unit.

Can you do PM at night so my truck stays in service during the day?

Yes. Owner-operators and small fleets often prefer 6 PM–10 PM windows. We accommodate it. After-hours is a modest premium and we tell you the number before we schedule.

Do you track DOT inspection due dates for me?

We can. For fleet customers we keep a per-unit calendar with PM due dates, annual DOT inspection dates, and brake-chamber lifecycle tracking. We email you 30 days before anything is due.

What if you find something broken during PM?

We tell you, with a price, and you decide. We don't auto-add repairs to a PM bill. If it's a safety item we'll explain why it matters.

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