Oklahoma diesel prices today
Oklahoma diesel prices todayDiesel averages $5.86 a gallon in Oklahoma on 2 October 2026 — the 50th most expensive of 51 states, and down $0.13 on the week.
Oklahoma against the other states
$0.51 a gallon below the unweighted mean of AAA's 51 state averages ($6.36). The cheapest diesel is in Texas at $5.79, the dearest in California at $8.38.
Regular gas in Oklahoma is $4.03, so diesel costs $1.82 more per gallon — and more than premium at $4.79.
Tax on a gallon of diesel
$0.24 federal + $0.20 Oklahoma · 48th highest of 51. The rest — about $5.41 — is the fuel itself, refining, distribution and the retailer’s margin.
Rates as of 1 January 2026. Local taxes, where they apply, are not included.
Diesel prices by city in Oklahoma
AAA's diesel averages for 4 Oklahoma metro areas, cheapest first — $0.09 a gallon between the two ends.
| Metro area | Diesel | vs state |
|---|---|---|
| Oklahoma City | $5.78 | −$0.08 |
| Lawton | $5.80 | −$0.06 |
| Tulsa | $5.83 | −$0.03 |
| Le Flore & Sequoyah Counties | $5.87 | +$0.01 |
Show the data as a table
What a diesel fill-up costs in Oklahoma
- Diesel car or SUV — 18 gal$105.43
- Heavy-duty pickup — 34 gal$199.14
- Box truck — 60 gal$351.42
- Semi truck, two tanks — 250 gal$1,464.25
Diesel in neighbouring states
More for Oklahoma
Frequently asked questions
How much is diesel in Oklahoma today?
$5.86 a gallon, AAA's Oklahoma average for 2 October 2026 — the 50th most expensive of 51 states. Regular gasoline is $4.03, so diesel costs $1.82 more per gallon.
Are diesel prices going up in Oklahoma?
Diesel is down $0.13 (2.2%) on a week ago, and up $2.63 on a year ago, when it was $3.23, on AAA's own earlier averages.
Where is diesel cheapest in Oklahoma?
Of the 4 metro areas AAA reports in Oklahoma, Oklahoma City has the cheapest diesel at $5.78 a gallon and Le Flore & Sequoyah Counties the dearest at $5.87. Individual stations vary around these averages.
How much is the diesel tax in Oklahoma?
$0.44 a gallon: $0.24 federal plus $0.20 in Oklahoma state taxes and fees, the 48th highest of 51. The state average is $0.36. Rates as of 1 January 2026.
Is diesel cheaper in a neighbouring state?
Yes — Texas ($5.79, $0.06 less). On a 100-gallon fill that is up to $6.40; whether it is worth the drive depends on how far the border is.