Diesel Fuel Prices in Tempe, AZ

Updated April 5, 2026 — Prices updated regularly from EIA data

$4.09

Diesel Fuel (N/A octane) per gallon

About Diesel Fuel in Tempe

Diesel fuel is $$4.09 per gallon in Tempe, Arizona today. Diesel-powered vehicles — from pickup trucks to commercial semis — rely on this energy-dense fuel for superior towing capacity and efficiency advantages over gasoline.

When to Use Diesel Fuel

Best for: commercial and towing

Vehicle types: diesel trucks and commercial vehicles

Fuel Price Comparison in Tempe

Fuel TypePricevs. Diesel FuelOctane
Regular Unleaded$3.02$-1.0787
Premium Gasoline$3.77$-0.3291-93
Diesel Fuel THIS PAGE$4.09—N/A

Diesel Fuel in Nearby Cities

Scottsdale$4.45Mesa$4.35Phoenix$4.20Gilbert$4.17Chandler$4.49Glendale$4.53Peoria$4.16Surprise$4.12
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Frequently Asked Questions

For vehicles designed to use Diesel Fuel, using the correct grade maintains engineered fuel economy. Upgrading from regular to premium in a regular-fuel car produces no economy improvement. Using regular in a premium-required car may reduce fuel economy slightly.
National Diesel Fuel prices average ${natPrice} per gallon. Tempe's current price of $$4.09 is {comparison} the national average. Regional refinery access and state tax differences drive most of the variation.
TOP TIER certification means the fuel exceeds EPA minimum detergency standards. Studies suggest TOP TIER fuels meaningfully reduce engine deposits vs. minimum-standard fuels. Most major brands (Shell, Chevron, BP, Costco) are TOP TIER certified.
Mixing grades is generally fine in practice — your engine's knock sensors will adjust timing accordingly. If your vehicle requires premium and you add some regular, no immediate damage occurs. Consistently running below the required octane in a performance engine is not recommended long-term.

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