Mountainside Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Week Ago Avg. | $4.1 | $4.44 | $4.58 | $4.57 | - |
| Month Ago Avg. | $4.1 | $4.44 | $4.58 | $4.57 | - |
Highest Recorded Average Gas Price In Mountainside Year to Date
| Price | Date | |
|---|---|---|
| Diesel | $4.57 | 06/15/26 |
| Regular | $4.1 | 06/15/26 |
Top 10 Gas Stations & Cheap Fuel Prices in Mountainside
BP in Mountainside (1121 US HIGHWAY 22)
1121 US-22, Mountainside, New Jersey,
$4.49
Jul 19, 2026
0¢ Cashback
BP in Mountainside (1121 US HIGHWAY 22)
1121 US-22MountainsideNew Jersey07092USA
Shell in Mountainside (900 Mountain Ave)
900 Mountain Ave, Mountainside, New Jersey,
$5.79
Jul 19, 2026
3¢ Cashback
Shell in Mountainside (900 Mountain Ave)
900 Mountain AveMountainsideNew Jersey07092USA
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Gas Data Methodology
The fuel prices published in this guide are based on the results of research completed by Way.com’s data team. Using a mix of external and internal data, we analyzed millions of prices across U.S. ZIP codes and globally.