Premium Gasoline Prices in Idaho Falls, ID

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

$4.26

Premium Gasoline (91-93 octane) per gallon

About Premium Gasoline in Idaho Falls

Premium unleaded is $$4.26 per gallon in Idaho Falls, Idaho right now. The premium over regular reflects real refining cost differences. For qualified vehicles, the performance difference is genuine — for others, it is wasted money.

When to Use Premium Gasoline

Best for: high-performance engines

Vehicle types: luxury and performance vehicles

Fuel Price Comparison in Idaho Falls

Fuel TypePricevs. Premium GasolineOctane
Regular Unleaded$3.41$-0.8587
Premium Gasoline THIS PAGE$4.26—91-93
Diesel Fuel$4.62+$0.36N/A

Premium Gasoline in Nearby Cities

Liberty Freedom Badge

Fuel Up Your Collection While You Save on Gas

American patriotic collectibles. Limited edition and built to last — just like your savings at the pump.

Get Your Badge →

Frequently Asked Questions

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.
Mixing grades is generally fine in practice — your engine's knock sensors will adjust timing accordingly. If your vehicle requires premium and you add some regular, no immediate damage occurs. Consistently running below the required octane in a performance engine is not recommended long-term.
{octaneInfo} Octane rating measures a fuel's resistance to premature ignition (knock). Standard regular is 87, mid-grade is 89-90, and premium is 91-93 in the United States.
Use GasBuddy and filter by fuel type to see current Premium Gasoline prices at stations near your location in Idaho Falls. Warehouse clubs and high-volume discount stations typically offer the best Premium Gasoline prices.

Related Gas Price Pages

All Fuel Types in Idaho FallsGas Prices in IdahoCheapest Premium Gasoline in Idaho FallsCompare All StatesRegular Unleaded in Idaho FallsDiesel Fuel in Idaho FallsShell Premium Gasoline - Idaho FallsExxon Premium Gasoline - Idaho FallsBP Premium Gasoline - Idaho FallsChevron Premium Gasoline - Idaho Falls