Updated April 5, 2026 — Prices updated regularly from EIA data
$4.70
Premium Gasoline (91-93 octane) per gallon
About Premium Gasoline in Spokane
Today's premium gas price in Spokane, Washington is $$4.70 per gallon. If your vehicle requires premium, using regular risks engine knock, reduced performance, and potentially costly long-term damage.
When to Use Premium Gasoline
Best for: high-performance engines
Vehicle types: luxury and performance vehicles
Fuel Price Comparison in Spokane
Fuel Type
Price
vs. Premium Gasoline
Octane
Regular Unleaded
$3.76
$-0.94
87
Premium Gasoline THIS PAGE
$4.70
—
91-93
Diesel Fuel
$5.09
+$0.39
N/A
Premium Gasoline in Nearby Cities
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All Premium Gasoline sold in Spokane must meet minimum federal standards. TOP TIER certified stations add extra detergency additives. Most major brands (Shell, Chevron, Costco, Wawa) are TOP TIER certified. Non-certified independents meet legal minimums only.
In Spokane, Premium Gasoline is priced at $$4.70 per gallon versus ${regularPrice} for regular — a ${diff} per gallon premium. On a 15-gallon fill-up, that's ${fillDiff} extra. Over 50 annual fill-ups, the premium adds ${annualDiff} to your fuel costs.
If your car requires premium and you accidentally fill with regular, modern engines have knock sensors that retard timing to prevent damage. You may notice reduced performance and slightly worse fuel economy. Fill with premium on your next fill-up. This is a minor issue if it happens occasionally.
Follow your owner's manual recommendation regardless of whether the car is new. Engine break-in does not require a specific fuel grade. Use what the manufacturer specifies from day one.
