Diesel Fuel Prices in Portland, OR

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

$5.05

Diesel Fuel (N/A octane) per gallon

About Diesel Fuel in Portland

Today's diesel price in Portland, Oregon is $$5.05 per gallon. Despite being {comparison} regular unleaded, diesel engines typically deliver 25-35% better fuel economy, making the per-mile cost highly competitive.

When to Use Diesel Fuel

Best for: commercial and towing

Vehicle types: diesel trucks and commercial vehicles

Fuel Price Comparison in Portland

Fuel TypePricevs. Diesel FuelOctane
Regular Unleaded$3.73$-1.3287
Premium Gasoline$4.66$-0.3991-93
Diesel Fuel THIS PAGE$5.05—N/A

Diesel Fuel in Nearby Cities

Beaverton$5.08Vancouver$5.27Gresham$5.20Hillsboro$5.08Salem$4.81
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Frequently Asked Questions

Only if your vehicle requires or recommends it. For vehicles designed for regular 87 octane, there is no measurable performance benefit from upgrading to Diesel Fuel. If your manual specifies Diesel Fuel, the investment protects your engine.
Diesel Fuel in Portland is currently priced at approximately $$5.05 per gallon. Nearby cities have comparable prices within 10-15 cents depending on their state's tax structure and local competition.
Diesel Fuel costs more due to the additional refining required to achieve its specifications. Higher octane fuel requires more complex blending processes. The markup reflects real production costs, not arbitrary station pricing.
Check your vehicle's owner manual or the inside of your fuel door. Required means you must use that grade to avoid damage. Recommended means optimal performance uses that grade but lower grades are tolerable. Regular means 87 octane is sufficient.

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