Fleet Fuel & Maintenance
Calculate fleet fuel efficiency and total ownership cost. Enter values for instant results with step-by-step formulas.
Formula
TCO = Fuel + Maintenance + Insurance + Depreciation\nCPM = TCO / Total Miles
TCO combines Variable Costs (Fuel, Tires, Repairs) which increase with mileage, and Fixed Costs (Insurance, Depreciation, Licenses) which happen regardless of usage. Understanding the ratio helps in pricing freight or services.
Worked Examples
Example 1: Delivery Van
Problem:20k miles/yr, 15 MPG, $3.50 gas, $0.15 maint/mile.
Solution:Fuel: $4,666. Maint: $3,000. Fixed: $5,000.
Result:Total: ~$12,666/yr or $0.63/mile.
Frequently Asked Questions
What is a good Cost Per Mile?
For long-haul trucking (Class 8), $1.60 - $1.80 is a common benchmark (though it varies with fuel prices). For sprinter vans, it might be $0.60 - $0.90.
What is the biggest cost factor?
Usually Fuel (30-40%) or Driver Wages (30-40%). Maintenance is typically 10%.
How often should I replace vehicles?
When the Maintenance Cost per Mile exceeds the monthly payment of a new vehicle (The Economic Replacement Point).
Does idling hurt TCO?
Yes. 1 hour of idling uses ~1 gallon of fuel and puts wear on the engine equal to ~30 miles of driving.
Can I use this for EVs?
Yes. Enter 'Electricity Cost' equivalent in the fuel field and adjust maintenance lower.
How do I calculate fuel costs for a road trip?
Divide total trip distance by your car's MPG to get gallons needed, then multiply by the price per gallon. Example: 500 miles at 25 MPG = 20 gallons x $3.50 = $70 in fuel. Use GasBuddy to find prices along your route and add 10% for city driving and detours.
Background & Theory
Variable vs Fixed Costs
- Variable (Operating) Costs: Fuel, Tires, Maintenance, Tolls. These stop if the truck stops.
- Fixed (Ownership) Costs: Lease/Loan payments, Insurance, Licenses, Permits, Depreciation. These occur even if the truck is parked.
Maintenance Cost Curves
Maintenance costs are not linear. They follow a "bathtub curve" or increase with age. A new truck costs $0.05/mile; a 5-year-old truck might cost $0.20/mile.
Fuel Surcharges
Because fuel is volatile, carriers often use a Fuel Surcharge (FSC) to pass the risk to the shipper. Knowing your base MPG is essential to calculate if the FSC covers your actual cost.
Optimization Tips
- Tire Pressure: Under-inflation increases fuel consumption by 1-3%.
- Speed Governors: Limiting speed to 65mph can save 10-15% on fuel compared to 75mph.
- Preventive Maintenance (PM): Catching a leak early is cheaper than a roadside breakdown ($500 vs $2000).
History
The Trucking Industry Standard
In the logistics industry, "Cost Per Mile" (CPM) is the holy grail metric. Since deregulation in 1980, competition tightened, and fleets needed precise cost tracking to bid on lanes profitably.
Telematics Revolution
With the advent of GPS telematics (like Geotab and Samsara), fleets moved from estimated TCO to actual TCO. They can now track fuel idling, aggressive driving (braking), and engine faults in real-time to reduce costs.
EV Fleets
The calculation is shifting with Electric Vehicles. EVs have lower "fuel" (electricity) and maintenance costs (no oil changes) but higher upfront depreciation/lease costs. This calculator adapts to both by allowing user inputs for cost categories.