Weekly Fuel Market Report – May 31st – June 6th, 2026


Did You Know That R99 Is The Same Cost As Diesel Currently?
Call to set up R99 Mobile Fueling Onsite Service in Portland at the same cost of retail diesel. Dyed untaxed R99 is also available. Give us a call today to schedule your delivery.
Wholesale Price Average 6/6/26
| Wholesale Low | Wholesale Avg | |
|---|---|---|
| E10 | $3.52 | $3.65 |
| B5 | $4.19 | $4.31 |
| B20 | $4.16 | $4.24 |
| R99 | $3.63 | $3.72 |
Average Retail Prices 6/6/26
| National | Oregon | Washington | |
|---|---|---|---|
| E10 | $4.17 | $5.13 | $5.62 |
| B5 | $5.31 | $5.96 | $6.56 |
Taxes
| Federal | State: OR | Local | State: WA | |
|---|---|---|---|---|
| Gas | $0.184 | $0.40 | $0-.13 | $0.494 |
| Diesel | $0.244 | $0.40 | $0-.13 | $0.494 |
Portland Retail Fuel Price Variance

Fuel Market News
Fuel prices fell this past week, while rack gas prices dropped, and retail prices were mostly stagnant. Wholesale rack prices for diesel dropped by only $0.01/gal in Portland, while gas dropped by over $0.12/gal. Retail gas prices in Portland are still over $5/gal at a current average of around $5.13/gal, while the Seattle area is over $5.85/gal. Retail diesel prices in Portland are still over $6/gal at a current average of around $6.06, while the Seattle area is over $6.81/gal. As of June 8th, the main pipeline in Washington state is down for maintenance. The area will likely see price upticks rolling into this week.

Important Note: Per the City Of Portland, “Distributors in the City of Portland are required to meet the minimum biofuel content requirements for all fuel they distribute beginning on May 15, 2024. All diesel fuel distributed to retail stations, non-retail dealers, or wholesale purchaser-consumers must include a minimum of 15% biofuel content, from either renewable diesel or biodiesel. This requirement increases to 50% on May 15, 2026, and 99% on May 15, 2030”.
Reasons For Price Variance
Oil Prices Hovering Around $194
Crude oil is hovering just below $95/barrel, at a current price of $94.35/barrel.
Crude oil is the main ingredient for gasoline and diesel. Per AAA, on average about 50% of what you pay at the pump is the price of crude oil, breaking down as 25% refining, 11% distribution & marketing, and 14% taxes – a helpful breakdown for consumers wondering why they are paying the prices that they pay. Crude Oil is currently trading at $94.35/barrel compared to $95.45/barrel last week and $74 a year ago.
It’s essential to recognize that fuel prices result from a complex interplay of the factors mentioned above and other regional factors. Additionally, prices may vary by specific regions within Oregon and Washington. For the most precise and up-to-date information on fuel prices and the causes for these price changes within your area, use the links below for AAA & GasBuddy.
If you have any questions, feel free to contact Star Oilco and speak to one of our fuel market advisors to discuss how the market can impact your business.



















