Cheapest Gas in Riverside, CA

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

$4.42

Lowest price at Costco in Riverside

Finding Cheap Gas in Riverside

The best-priced gas in Riverside, California is at $$4.42 per gallon — that's $$0.25 below the local average. Over 50 fill-ups per year, that's $$12.00 in your pocket without changing how you drive.

Maximum Savings in Riverside

Choose Costco over Chevron

$0.25 per gallon

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

Cheapest Brands in Riverside

Rank	Brand	Est. Price	Savings vs. Most Expensive
#1	Costco	$4.42	$0.25
#2	Speedway	$4.54	$0.13
#3	Circle K	$4.55	$0.12
#4	Sunoco	$4.58	$0.09
#5	Marathon	$4.59	$0.08
#6	BP	$4.61	$0.06
#7	Mobil	$4.62	$0.05
#8	Exxon	$4.63	$0.04
#9	Shell	$4.65	$0.02
#10	Chevron	$4.67	$0.00

Gas Saving Tips for Riverside Drivers

Pay cash at stations offering a cash vs. credit discount — typically 5-10 cents per gallon savings that adds up significantly over time.
Do not let your tank run below a quarter — low fuel levels increase wear on electric fuel pumps and can lead to emergency fill-ups at inconvenient and expensive stations.
Check fuel prices across state lines if you regularly travel near a border. State fuel taxes vary by up to 50 cents per gallon — the savings from crossing into a lower-tax state can be dramatic.
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.