Cheapest Gas in Naperville, IL

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

$3.28

Lowest price at Costco in Naperville

Finding Cheap Gas in Naperville

To find the cheapest Naperville gas, look for warehouse clubs, high-volume discount chains, and stations in competitive commercial corridors. Today's best Naperville price is $$3.28 per gallon for regular unleaded.

Maximum Savings in Naperville

Choose Costco over Chevron

$0.25 per gallon

$3.75 per 15-gallon fill • $12.00 per year (est.)

Cheapest Brands in Naperville

Rank	Brand	Est. Price	Savings vs. Most Expensive
#1	Costco	$3.28	$0.25
#2	Speedway	$3.40	$0.13
#3	Circle K	$3.41	$0.12
#4	Sunoco	$3.44	$0.09
#5	Marathon	$3.45	$0.08
#6	BP	$3.47	$0.06
#7	Mobil	$3.48	$0.05
#8	Exxon	$3.49	$0.04
#9	Shell	$3.51	$0.02
#10	Chevron	$3.53	$0.00

Gas Saving Tips for Naperville Drivers

Use cruise control on highways to maintain steady speed. Speed variability increases fuel consumption; steady-state driving at 65 MPH uses significantly less fuel than oscillating between 55 and 75.
Avoid idling for more than 60 seconds. Modern engines warm up faster while driving than idling, and idling gets literally zero miles per gallon.
Park in shaded areas when possible — parking in the sun increases evaporative fuel loss from your tank and makes the engine work harder to cool the cabin when you start driving.
Combine errands into single efficient trips rather than making multiple short trips. Cold engines use significantly more fuel — letting the engine warm up across one longer trip is far more efficient.
Check tire pressure monthly, especially as seasons change — tire pressure drops about 1 PSI for every 10-degree Fahrenheit temperature decrease.