Mount Joy area fuel prices: AAA Lancaster metro gas & diesel (July 12)

Mount Joy PA Gas & Diesel Watch

Here’s what changed in the Mount Joy area for drivers and fleets, using AAA’s Lancaster metro averages (price as of 7/12/26). Metro averages aren’t the same as any single station—but they’re a solid day-to-day barometer for what you can expect nearby.

Regular gas: down vs. yesterday

AAA Lancaster metro regular gas (unleaded): $3.867/gal

• vs. yesterday: $3.872 (-0.5 cents)
• vs. week ago: $3.755 (+11.2 cents)
• vs. month ago: $4.045 (-17.8 cents)
• vs. year ago: $3.151 (+71.6 cents)

Diesel: down vs. yesterday

AAA Lancaster metro diesel: $5.294/gal

• vs. yesterday: $5.312 (-1.8 cents)
• vs. week ago: $5.267 (+2.7 cents)
• vs. month ago: $5.587 (-29.3 cents)
• vs. year ago: $4.004 (+129.0 cents)

U.S. context (EIA weekly): both down vs. last week

The latest EIA weekly update (week ending 07/06/26) shows U.S. regular gasoline averaging $3.777/gal, down 5.4 cents from the prior week. U.S. on-highway diesel averaged $4.578/gal, down 9.0 cents from the prior week.

What this can mean locally for Mount Joy-area drivers

For commuters, the regular-gas average is slightly lower than yesterday—but still well above last year. Over a week of routine stops, even “small” cents-per-gallon changes can add up across multiple fill-ups.

For contractors, service businesses, and delivery/fleet operators, diesel pricing is the bigger watch point. Diesel is down compared with yesterday in this metro snapshot, but it’s still higher than a week ago—so it can move quickly from one refuel cycle to the next.

Looking at longer swings, both fuels in the Lancaster metro average are down versus last month, but up versus last week and last year—matching the broader squeeze many households and local businesses are still feeling at the pump.

Reader tip: If you run equipment or do work mileage daily, compare diesel prices at a few nearby pumps—not just one station. Fleet buyers often see bigger differences between locations than a metro average suggests.

Share your data: What are the highest and lowest pump prices you’re seeing around Mount Joy right now?

Sources

• AAA Gas Prices (Pennsylvania) — Lancaster metro averages
• EIA Gasoline and Diesel Fuel Update — U.S. weekly regular and on-highway diesel
• Lancaster County, PA — County Municipalities & Schools