Regular Unleaded Prices in Rockford, IL

Updated May 20, 2026 — Prices updated regularly from EIA data

$3.59

Regular Unleaded (87 octane) per gallon

About Regular Unleaded in Rockford

Regular unleaded at $$3.59 per gallon is Rockford's most competitive fuel segment. High-volume stations, warehouse clubs, and discount brands all fight aggressively for the regular-gas customer — use that competition to your advantage.

When to Use Regular Unleaded

Best for: everyday driving

Vehicle types: most cars and trucks

Fuel Price Comparison in Rockford

Fuel TypePricevs. Regular UnleadedOctane
Regular Unleaded THIS PAGE$3.59—87
Premium Gasoline$4.36+$0.7791-93
Diesel Fuel$4.47+$0.88N/A

Regular Unleaded in Nearby Cities

Elgin$3.56Aurora$3.35Schaumburg$3.58Madison$2.94Naperville$3.43Waukegan$3.44Des Plaines$3.62Kenosha$2.84
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Frequently Asked Questions

Check your vehicle's owner manual or the inside of your fuel door. Required means you must use that grade to avoid damage. Recommended means optimal performance uses that grade but lower grades are tolerable. Regular means 87 octane is sufficient.
For vehicles designed to use Regular Unleaded, using the correct grade maintains engineered fuel economy. Upgrading from regular to premium in a regular-fuel car produces no economy improvement. Using regular in a premium-required car may reduce fuel economy slightly.
National Regular Unleaded prices average ${natPrice} per gallon. Rockford's current price of $$3.59 is {comparison} the national average. Regional refinery access and state tax differences drive most of the variation.
TOP TIER certification means the fuel exceeds EPA minimum detergency standards. Studies suggest TOP TIER fuels meaningfully reduce engine deposits vs. minimum-standard fuels. Most major brands (Shell, Chevron, BP, Costco) are TOP TIER certified.

Related Gas Price Pages

All Fuel Types in RockfordGas Prices in IllinoisCheapest Regular Unleaded in RockfordCompare All StatesPremium Gasoline in RockfordDiesel Fuel in RockfordShell Regular Unleaded - RockfordExxon Regular Unleaded - RockfordBP Regular Unleaded - RockfordChevron Regular Unleaded - Rockford

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