Spreads
Rocky Mountain (PADD 4) vs the US average
-4.4 cents/gal vs the US average for the week of Aug 31, 2026. Positive means Rocky Mountain pays over the national number.
Data through Aug 31, 2026 · source last checked Sep 1, 2026 · page revised Sep 1, 2026
Cite
- Spread
About this data
- Source
- Derived from EIA weekly on-highway diesel survey
- Series
- Rocky Mountain (PADD 4) vs the US average
- Basis
- Region pump price minus the US average
- Unit
- cents/gal
- Calculation
- Weekly (survey week)
- Last observation
- Aug 31, 2026
- Update frequency
- Weekly
Rocky Mountain pays 4.4 cents/gal under the US average this week. The gap is 7.1 cents wider than a week ago.
Rocky Mountain is 4.4 cents/gal under the US average for the week of Aug 31, a 7.1-cent improvement from a week ago. A year ago the region was 1.9 cents/gal over the national number.
| Period | Gap | Week of |
|---|---|---|
| This week | -4.4 cents/gal | Aug 31, 2026 |
| A week ago | -11.5 cents/gal | Aug 24, 2026 |
| 4 weeks ago | -6.3 cents/gal | Aug 3, 2026 |
| A year ago | +1.9 cents/gal | Sep 1, 2025 |
Previous weeks
Week of Aug 24, 2026
Rocky Mountain diesel trades 11.5 cents/gal under the national average this week. The discount widened by 8.8 cents from a week ago. A year ago the region was 4.0 cents/gal over the national number, marking a substantial reversal.
An earlier week
Rocky Mountain paid 2.7 cents under the US average this week, down 4.1 cents from a week ago when the region held a 1.4-cent premium. The reversal in a single week moved the region from paying over the national number back to a discount.
Week of Aug 18, 2026
Rocky Mountain pumps 1.4 cents/gal over the US average this week, up 7.7 cents from a week ago when the region paid 6.3 cents under the national number. The swing has been sharp: four weeks earlier, Rocky Mountain was 19.6 cents below average. A year ago the spread was +2.2 cents/gal.