Amityville gas & diesel: AAA shows regular at $4.01, diesel at $5.45—what changed today

AAA’s latest Nassau–Suffolk averages: regular gasoline is $4.0090/gal as of 7/18/26, up slightly from yesterday (+$0.0250). Diesel is $5.4490/gal, also higher than yesterday (+$0.0310). For Amityville-area drivers, AAA’s Nassau–Suffolk metro numbers are a useful proxy—individual pump prices vary by station.

Regular gas (Nassau–Suffolk average)

$4.0090/gal today (7/18/26)

• Yesterday (7/17/26): $3.9840/gal (+$0.0250)
• Last month: $4.0920/gal (−$0.0830)
• A year ago: $3.0980/gal ( +$0.9110)

So compared with the last check, regular is moving up a bit—but it’s still meaningfully above where it was a year ago.

Diesel (Nassau–Suffolk average)

$5.4490/gal today (7/18/26)

• Yesterday (7/17/26): $5.4180/gal (+$0.0310)
• Last month: $5.6120/gal (−$0.1630)
• A year ago: $3.9030/gal (+$1.5460)

Diesel has eased versus last month, but the year-over-year gap remains large—exactly why fuel costs can feel “sticky” for anyone who depends on diesel-powered service, delivery, construction, or trucking.

What this means locally

For commuters and weekend drivers, the small uptick from yesterday means the cost difference is usually more noticeable in total cost across multiple fill-ups than it is at a single pump. For businesses and workers running fleets—delivery vans, service trucks, trades crews, and other diesel users—the year-ago level matters most, because operating costs often adjust quickly through fuel-heavy routes, scheduling, and contractor pricing.

Because AAA’s metro average smooths out station-by-station differences, it’s still worth checking nearby stations before you fill up—especially if you’re making a longer trip this weekend or routinely top off during a busy work week.

National direction check (latest weekly data)

EIA’s most recently reported weekly estimates (week ending 7/13/26) show regular conventional gasoline at $3.728/gal and No. 2 diesel at $4.796/gal. Those national figures help frame the overall direction, but they aren’t the same as what you’ll pay at a specific Amityville-area pump.

Reader check

What are the highest and lowest pump prices you’re seeing today in and around Amityville?

Sources

• AAA Fuel Prices — New York (includes Nassau–Suffolk metro average; current/yesterday/week/month/year)
• EIA weekly U.S. regular conventional gasoline retail prices (table; latest week ending shown)
• Village of Amityville official site — About Amityville (location in Suffolk County)