CPM (COST PER MILE ) MAINTENANCE AND REPAIR ESTIMATES

Assumes 100,000 miles per year and premium shop rates.

Expense Category	Service Interval / Notes	High-Side Cost	Cost Per Mile (CPM)
Tires (Steer & Drive)	Every 100k miles (Premium Brands)	$7,500	$0.075
Emissions (DPF/SCR/EGR)	Annual sensors, cleaning, & dosing	$6,500	$0.065
Unexpected Repairs Fund	Major component failures/roadside	$6,000	$0.060
Oil Changes (PM-B)	Every 25k miles (Full Synthetic)	$4,500	$0.045
Brakes (Full Overhaul)	Every 200k miles (Pads/Drums/Labor)	$5,000	$0.025
Towing & Recovery	Emergency hook-ups (2 events/yr)	$2,500	$0.025
Clutch Replacement	Every 400k miles (High-side labor)	$6,000	$0.015
Fuel Injectors (Set of 6)	Every 500k miles	$7,500	$0.015
Turbocharger / Actuator	Every 400k miles	$6,000	$0.015
Cooling & Electrical	Radiator, Water Pump, Alternator	$3,000	$0.030
---	---	---	---
TOTAL ESTIMATED CPM			$0.370

Parts Inflation: Since 2023, the cost of complex components like Turbo Actuators and NOx sensors has outpaced general inflation. A single sensor that used to cost $400 is now often $650+ before labor.
Labor Shortages: Diesel technician wages have risen sharply. Even for simple jobs, minimum shop "diagnostic" fees and shop supplies charges can add $200–$400 to every visit.
The Emissions Reality: On 2018+ trucks, the complexity of the after-treatment system remains the #1 cause of downtime. Setting aside $0.065/mile specifically for emissions ensures you aren't wiped out by a failed SCR catalyst (which can run $5k–$8k).
The "PM-B" Spike: High-quality synthetic oil and premium filters have seen double-digit price increases. Doing a full wet-service every 25,000 miles at $1,125 per service is a safe high-end budget.

To keep your business running at this $0.37/mile rate, you should be putting away: