Montana

Rocky Mountain (PADD 4)

$6.407

Diesel /gal · 27th cheapest

29.75¢

State fuel tax · 26th lowest

22.7%

OOS rate · 42nd lowest

86,038

Inspections (24 mo)

Diesel price trend

Rocky Mountain (PADD 4) · 3 years, EIA weekly

Weekly on-highway diesel · 2023-10-09 → 2026-09-28

Fuel

Retail diesel6.407/gal

National avg: 6.407/gal · at or below average

Tax at the pump54.1¢/gal

■ State 29.75¢ ■ Federal 24.4¢ · per gallon

Roadside safety

FMCSA inspections in Montana, last 24 months

Out-of-service rate22.7%

National avg: 17.6% · above average

Violations per inspection0.93

Out-of-service by inspection type

Driver8,511 viol · 65% OOS

Vehicle17,751 viol · 71% OOS

HazMat164 viol · 20% OOS

86,038

Inspections

33rd most

80,105

Violations

18,172

OOS violations

21.1

Viol / 100 insp

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Diesel: U.S. Energy Information Administration (weekly, by region — states inherit their PADD region price). Fuel tax: FHWA Highway Statistics MF-121T. Inspections & out-of-service: FMCSA (last 24 months). Estimates for guidance, not official figures. Not affiliated with FMCSA.