Costco Gas Prices in Springfield, IL

Updated April 5, 2026 — Prices updated regularly from EIA data

$3.19

Costco Regular Unleaded — Est. price in Springfield

About Costco Fuel

Costco Wholesale operates fuel stations at most of its warehouse locations, offering some of the consistently lowest gas prices in America. Costco's massive purchasing power allows it to undercut traditional retail stations by 10-25 cents per gallon. Costco fuel meets TOP TIER detergent standards and is the same quality as brand-name alternatives at a significant discount.

Costco Loyalty Program

Costco membership required ($65/year individual or $130/year Executive). Executive members earn 2% back on all Costco purchases including fuel. For a family filling up weekly, fuel savings alone often exceed the membership cost.

Brand Price Comparison in Springfield

BrandEst. Pricevs. Costco
Costco THIS PAGE$3.19—
Speedway$3.31+$0.12
Circle K$3.32+$0.13
Sunoco$3.35+$0.16
Marathon$3.36+$0.17
BP$3.38+$0.19
Mobil$3.39+$0.20
Exxon$3.40+$0.21
Shell$3.42+$0.23
Chevron$3.44+$0.25

Costco Prices in Nearby Cities

Decatur$3.52Bloomington$3.52Peoria$3.50Champaign$3.42St. Louis$2.76
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Frequently Asked Questions

Using the correct grade of Costco fuel for your vehicle will not meaningfully change fuel economy compared to other brands selling the same grade. Engine design and driving behavior have a far larger impact on MPG than fuel brand choice.
Shell (V-Power NiTRO+), Chevron (Techron), and Costco all offer proprietary engine-cleaning additive packages. Controlled studies show meaningful differences between TOP TIER and non-TOP TIER fuels, but less significant differences between competing TOP TIER brands.
Costco typically prices fuel $0.15 below the local Springfield market average. Current estimated Costco regular price in Springfield is approximately $$3.19 per gallon.
Costco membership required ($65/year individual or $130/year Executive). Executive members earn 2% back on all Costco purchases including fuel. For a family filling up weekly, fuel savings alone often exceed the membership cost. Consistent use of the Costco loyalty program can realistically save 5-15 cents per gallon, adding up to $40-120 annually for a typical driver filling up weekly.

Related Gas Price Pages

All Gas Prices in SpringfieldCheapest Gas in SpringfieldGas Prices in IllinoisShell in SpringfieldExxon in SpringfieldBP in SpringfieldChevron in SpringfieldMobil in SpringfieldCircle K in SpringfieldRegular Unleaded at CostcoPremium Gasoline at CostcoDiesel Fuel at Costco