South Bend fuel prices: Diesel rises while regular gas stays nearly flat (AAA, July 18)
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South Bend drivers got an almost-still day for regular gasoline, but diesel moved up in the latest AAA South Bend metro average prices as of 7/18/26. For people planning commute fill-ups or fleet/delivery schedules, the two fuels are moving differently right now.
South Bend metro regular gasoline: essentially flat vs. yesterday
AAA shows South Bend metro regular gasoline at $3.368/gal as of 7/18/26. These are metro-average prices—your local station can be higher or lower.
Since yesterday:
- Regular: $3.368/gal (7/18/26) vs. $3.369/gal yesterday — about a one-tenth-of-a-cent change.
Looking beyond today:
- Week ago: $3.274/gal
- Month ago: $3.410/gal
- Year ago: $3.267/gal
So what for commuters and households: When regular stays basically the same from one day to the next, your usual “best station” and timing often matter more than waiting for today’s change.
South Bend metro diesel: higher than yesterday
AAA shows diesel at $5.006/gal as of 7/18/26, up from $4.988/gal yesterday.
Since yesterday:
- Diesel: $5.006/gal (7/18/26) vs. $4.988/gal yesterday — an increase of $0.018/gal.
Diesel also shows bigger swings across timeframes:
- Week ago: $4.910/gal
- Month ago: $5.539/gal
- Year ago: $3.822/gal
So what for delivery drivers, contractors, and fleet users: A daily bump can show up quickly when you’re burning through a lot of fuel. Still, diesel is down versus last month—so this week’s budgeting impact may be smaller than what you saw earlier in the month, even while it remains well above a year ago.
National and U.S. trend context (AAA + EIA)
AAA’s national averages were also modestly higher for both fuels on 7/18/26: regular at $3.992/gal (up from $3.981 yesterday) and diesel at $5.088/gal (up from $5.058 yesterday).
EIA’s latest weekly U.S. update likewise shows increases in its readings for 07/13/26 vs. 07/06/26: U.S. regular gasoline rose from $3.777 to $3.855, while U.S. on-highway diesel rose from $4.578 to $4.796.
Quick price tip for the road
Because regular and diesel are moving differently right now, it can pay to check both fuels before you commit to a “quick fill,” especially if you run mixed-use vehicles—or if your business fleet isn’t the only one that needs fuel today.
Share with other readers: What are the highest and lowest pump prices you’re seeing in the South Bend area right now—and are you shopping for regular or diesel?
Sources
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