Define your service tiers (A / B / C)

A‑service is the chassis lube + oil + filters + visual every 10–15K mi. B‑service adds brake adjustment, fluid sampling, and full DVIR-style inspection. C‑service is the annual deep dive (DPF, injectors, drivelines, suspension torque). Tiering keeps low-skill work fast and reserves bay time for the heavy stuff.

•A: oil, filters, lube, lights, tire rotation, fluid top-off
•B: A + brake adj, sampling, suspension, steering
•C: B + DPF service, injector cups, driveline U-joints, alignment

Schedule by usage profile, not by mileage

A long-haul tractor and a P&D box truck hit the same odometer in very different conditions. Service the P&D unit on engine hours and start-cycles; service the highway tractor on miles. Switch on whichever metric trips first.

•Highway: miles
•Urban/P&D: engine hours
•Idle-heavy (refrigerated, utility): hours + idle hours
•Severe duty: cut intervals by 25%

Build the inspection checklist on the DVIR

Use the federal DVIR list (49 CFR 396.11) as your skeleton, then add anything you've seen fail twice. The checklist must be the same on paper and in the software — drivers won't follow two versions.

•Service brakes + parking brake
•Steering, horn, wipers
•Tires/wheels/rims
•Lights + reflectors
•Coupling devices
•Emergency equipment

Track the right KPIs

Three numbers tell you everything: PM compliance rate (>95% target), roadside breakdowns per million miles (<10 best-in-class), and cost per mile by unit. Anything outside those needs a why.

•PM compliance rate
•Breakdowns / million mi
•Cost per mile per unit
•MTBF (mean time between failure)

Pick fleet maintenance software last

The software is the easy part — the program is the hard part. Pick a tool only after you've defined tiers, intervals, and KPIs on paper. Then evaluate Fleetio, Whip Around, RTA, or Repairius Fleet on whether they fit your tiers, not their feature list.

•Mobile DVIR on driver phones
•Custom service intervals per unit class
•Roll-up reporting across yards
•Integration with telematics + fuel cards

Frequently asked questions

How often should a fleet preventive maintenance interval be?

For Class 8 highway trucks, 15,000–25,000 miles is standard. Severe-duty, refrigerated, or idle-heavy applications should cut that by 20–30%. Always pair mileage with engine-hour and start-cycle triggers.

What's the ROI on preventive maintenance?

ATA data shows every $1 spent on PM saves $4–$7 in repair + downtime cost. Most fleets see 30–50% fewer roadside breakdowns within 6 months of formalizing a PM program.

Do I need fleet maintenance software?

Yes — past ~10 units, spreadsheets break. The software is the easiest decision, though; pick it after you've designed the program.

What's the difference between PM and predictive maintenance?

PM is calendar/usage-based ('every 20K mi'). Predictive uses telematics + oil analysis to service only when condition warrants. Predictive wins at scale (50+ units).

How to Build a Fleet Preventive Maintenance Program That Actually Works

The real problem

By the numbers