New Mexico diesel prices today
New Mexico diesel prices todayDiesel averages $6.09 a gallon in New Mexico on 2 October 2026 — the 36th most expensive of 51 states, and down $0.20 on the week.
New Mexico against the other states
$0.28 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 New Mexico is $4.39, so diesel costs $1.69 more per gallon — and more than premium at $5.15.
Tax on a gallon of diesel
$0.24 federal + $0.23 New Mexico · 44th highest of 51. The rest — about $5.61 — 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 New Mexico
AAA's diesel averages for 4 New Mexico metro areas, cheapest first — $0.40 a gallon between the two ends.
| Metro area | Diesel | vs state |
|---|---|---|
| Las Cruces | $5.98 | −$0.11 |
| Albuquerque | $6.08 | −$0.00 |
| Santa Fe | $6.33 | +$0.25 |
| Farmington | $6.37 | +$0.29 |
Show the data as a table
What a diesel fill-up costs in New Mexico
- Diesel car or SUV — 18 gal$109.53
- Heavy-duty pickup — 34 gal$206.89
- Box truck — 60 gal$365.10
- Semi truck, two tanks — 250 gal$1,521.25
Diesel in neighbouring states
More for New Mexico
Frequently asked questions
How much is diesel in New Mexico today?
$6.09 a gallon, AAA's New Mexico average for 2 October 2026 — the 36th most expensive of 51 states. Regular gasoline is $4.39, so diesel costs $1.69 more per gallon.
Are diesel prices going up in New Mexico?
Diesel is down $0.20 (3.2%) on a week ago, and up $2.56 on a year ago, when it was $3.53, on AAA's own earlier averages.
Where is diesel cheapest in New Mexico?
Of the 4 metro areas AAA reports in New Mexico, Las Cruces has the cheapest diesel at $5.98 a gallon and Farmington the dearest at $6.37. Individual stations vary around these averages.
How much is the diesel tax in New Mexico?
$0.47 a gallon: $0.24 federal plus $0.23 in New Mexico state taxes and fees, the 44th 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, $0.29 less), Oklahoma ($5.86, $0.23 less), Colorado ($6.06, $0.02 less). On a 100-gallon fill that is up to $29.20; whether it is worth the drive depends on how far the border is.