Fuel & DEF Verified Factory Specs

Commercial Heavy Duty Diesel Fuel Burn & DEF Consumption Hub

Interactive fleet calculators for diesel fuel consumption (GPH vs MPG), SCR DEF dosing rates, and Brake Specific Fuel Consumption (BSFC) efficiency curves.

Engine Rated Horsepower (HP)

Average Engine Load Factor

Average Cruise Speed

MPH

SCR DEF Dosing Rate

Fuel Burn Rate (GPH)

10.57 gal/hr

40.01 Liters/hour

Calculated Fuel Mileage

6.1 MPG

At 65 MPH sustained cruise

DEF Injection Rate

0.317 gal/hr

3% of diesel consumption

DEF Range Per Gallon

205 miles/gal

~3075 miles on 15-gal tank

Commercial Fleet Fuel & DEF Engineering Calculators

Tool 1

Fuel Burn Calculator (GPH)

Calculate hourly and trip fuel burn based on HP utilization.

Tool 2

DEF Dosing Calculator

Calculate DEF tank range and dosing percentage (2.0% - 3.5%).

Tool 3

BSFC Efficiency Solver

Brake Specific Fuel Consumption math in lb/hp·hr and g/kW·h.

Related Heavy Diesel Engineering Tools

Cross-reference other factory specifications and diagnostic tools for commercial diesel engines:

Pillar 3 →

Valve Lash & Overhead

Intake, exhaust, & Jake brake clearances.

Pillar 1 →

Oil & Coolant Sump

Standard vs deep pan fill volumes.

Pillar 4 →

Head Bolt Torque

Torque-to-yield angle stages & sequences.

Pillar 2 →

SPN Fault Code Lookup

J1939 fault diagnostics & sensor pins.

Technical Reference Citation: SAE J1321 Fuel Consumption Test Procedure & EPA Heavy-Duty Engine Certification Standards

View Engineering Methodology & Standards →