TA Petro Diesel Price in 2026: $6.35 Cash, Comdata Saves $0.40/gal
Diesel benchmark, EIA week of October 26, 2026
$6.35/gal US on-highway average (+7.6c on the week)
TA Petro does not publish a national average diesel price, and EIA surveys the retail market rather than individual chains. Each TA Petro store posts its own price: check it in ta-petro.com's location fuel prices before you fuel. The figures here are what diesel cost across the market that week, by EIA district:
Source: EIA Gasoline and Diesel Fuel Update, No. 2 on-highway diesel, retail, all types. Prices include federal and state taxes.
What readers paid at TA Petro
Prices readers report from the pump: what they paid, where, and how they paid. Each one is a single fill on the date shown, not a survey average; the weekly EIA figures elsewhere on this page are the survey.
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The Comdata Math at TA Petro
Comdata's published Total Advantage rate at TA/Petro is up to 40 cents a gallon, its largest at any of the three national chains on that product. On the EIA US average, here is what the full discount would mean per fill:
| Gallons per fill | Cash cost | With Comdata (40c off) | Savings |
|---|---|---|---|
| 100 gal | $635.00 | $595.00 | $40.00 |
| 150 gal | $952.50 | $892.50 | $60.00 |
| 200 gal | $1270.00 | $1190.00 | $80.00 |
| 300 gal | $1905.00 | $1785.00 | $120.00 |
Model: the EIA US on-highway average for the week of October 26, 2026 ($6.35/gal) as the cash price, minus Comdata's maximum published Total Advantage discount at TA/Petro (up to 40c/gal). Your store's posted price and your approved discount will differ. Comdata's published small-fleet rates (comdata.com/small-fleets): up to the figure shown off the cash price, for fleets of 20 or fewer trucks at the time of application. The chains approve each fleet's discount, payment must be in full and on time, and rates can change from twelve months after account set-up. Larger fleets negotiate. Comdata Max requires Comdata factoring. Checked against comdata.com on October 27, 2026.