DIESEL COMPARISON
Diesel Day Cab
MPG
$/gal
Starting price: EIA U.S. average, week of Oct 12, 2026. Includes taxes; edit for your fuel costs.
$/mi
Use MPG for your route and configuration. Changing model year does not assume a fuel-economy gain.
REL · CLASS 8 COST COMPARISON
Electric vs. diesel.
EV Truck & Diesel Day Cab. Your miles. Your assumptions.
Start with an example. Make it yours. The starting diesel price uses a dated EIA U.S. average. Other prices, MPG and service costs are illustrative—not REL quotes or verified fleet averages. All amounts are in USD.
YOUR OPERATION
Same miles. Same fleet.
mi
trucks
DIESEL
BATTERY ELECTRIC
EV Truck
kWh/mi
$/kWh
%
$/mi
Energy use is treated as truck-side. Use 100% efficiency if your kWh/mi already includes charging losses.
Lease payments & other costsAdd your quotes, insurance, DEF and charging fees.
Monthly lease quotes
Enter both quotes to include leases in the comparison. Blank means not supplied; zero means an explicitly entered $0 payment. The period selector does not reprice a quote.
$/truck/mo
$/truck/mo
Other operating costs
Enter only maintenance and insurance paid outside your lease. Insurance and charging fees start at $0 and must be added when applicable.
$/truck/mo
$/truck/mo
$/mi
Shared charging costs
These are monthly totals for the comparison fleet, divided equally across its trucks. Enter demand charges only when they are not already in the electricity price.
$/fleet/mo
$/fleet/mo
Include recurring charger financing, network or site fees. Upfront installation costs are excluded; no automatic amortization is applied.
YOUR MODELED DIFFERENCEOperating costs · no leases
Electric costs less in this scenario.
$5,828/ truck / month
64.6% below diesel under the entered assumptions.
Annual fleet difference$69,9381 truck · lower EV cost
5-year fleet difference$349,690Same miles and prices each year
Diesel Day Cab · 2027
$1.08/ mile$9,023 per truck / monthEV Truck
$0.38/ mile$3,194 per truck / monthElectricity break-even price
$0.520 / kWhAt this energy price, modeled costs match. Other inputs stay the same.Operating estimate only. Lease payments are excluded until both quotes are entered. Insurance is set to $0 for at least one vehicle. Charging overhead is set to $0. Review these assumptions before using the difference.
FOLLOW THE NUMBERS
Cost breakdown
Per truck · per month
| Cost category | Diesel Day Cab 2027 | EV Truck |
|---|---|---|
| Diesel / electricity | $7,356 | $2,361 |
| Maintenance + tires | $1,500 | $833 |
| Diesel exhaust fluid | $167 | $0 |
| Insurance | $0 | $0 |
| Charging demand charges | $0 | $0 |
| Charging payments + fees | $0 | $0 |
| Modeled total | $9,023 | $3,194 |
14,286 diesel gallons and 188,889 billed kWh per truck / year. Shared charging costs are allocated across 1 truck.
Assumptions, sources & calculation notes
What is sourced—and what is an example?
The EV Truck is a generic comparison vehicle. The 1.7 kWh/mi starting value is an editable planning example, not a verified industry average or a guarantee for a particular truck. It is treated as truck-side energy for this illustrative calculation; the separate 90% charging-efficiency default is also a planning assumption. Use energy consumption for your route and equipment.
The diesel day cab is a generic comparison vehicle. The 7 MPG starting value is an editable planning example, not a manufacturer rating or verified industry average. Both year choices use the same assumptions. Use MPG for your route and equipment.
The starting diesel price is $6.179/gal from the EIA U.S. on-highway diesel average for the week of Oct 12, 2026, including taxes. Regional and fleet-negotiated prices can differ; enter your actual price. The reference is checked weekly, and its date is retained if a new figure cannot be verified. Electricity at $0.15/kWh, maintenance and tires at $0.18/mi diesel and $0.10/mi EV, and DEF at $0.02/mi are editable demonstration values. They are not current market quotes, verified fleet averages or promised savings.
How the comparison works
- Diesel energy cost = miles ÷ MPG × price per gallon.
- Electricity cost = miles × truck-side kWh/mi ÷ charging efficiency × price per kWh. A 90% efficiency means dividing by 0.90. Use 100% with already-metered consumption.
- Maintenance and DEF use entered cost per mile. Insurance uses cost per truck per month. Shared charging fees are divided by truck count once.
- Both monthly lease quotes must be entered before either is included. Costs bundled in the lease should not also be entered separately.
- Multi-year differences hold annual miles and prices constant. They do not model inflation, discounting, residual value or ownership equity.
What is outside this comparison?
Upfront charging construction and installation, down payments, refundable deposits, taxes, registration, driver labor, downtime, payload-related revenue effects, battery replacement and residual values are not modeled. Add applicable recurring charger payments in the charging field. This is a comparison of selected costs, not total cost of ownership or a route-feasibility assessment.
Rebates and tax benefits are not deducted automatically. If an approved incentive is already reflected in a quoted lease payment, use that net payment without deducting the incentive again. Explore potential truck incentives .