Premium Gas Price Today: How Much More Than Regular – and Is It Worth It?
The latest U.S. average price of premium gasoline, how big the gap to regular is, and when your car really needs it.
Updated November 3, 2026
📊 U.S. national averages · EIA week of Nov 9, 2026
The box above shows the latest U.S. national average for premium gasoline from the EIA weekly survey, next to regular, midgrade and diesel. Premium is gasoline with an octane rating of 91 to 93 in most states (lower at high altitude), compared with 87 for regular.
How much more premium costs
The gap between premium and regular has widened over the past decade. In the EIA survey for the week of October 26, 2026, premium averaged $5.275 per gallon and regular $4.269 – a difference of about $1.00 per gallon. On a 15-gallon fill-up that is roughly $15 more; for a driver who buys 600 gallons a year, about $600.
The gap is not the same everywhere. In California and other West Coast states premium often costs a little less extra in percentage terms, while in parts of the Midwest and Southeast the dollar gap can be larger because regular is cheap.
When you need premium
- If the owner’s manual or fuel door says “premium required”, use it. These engines – often turbocharged or high-compression – are designed for higher octane, and lower octane can cause knocking and, over time, damage.
- If the manual says “premium recommended”, the engine will run safely on regular, usually with slightly less power. Whether the small gain is worth about $1 a gallon is your call.
- If the manual says regular 87, premium brings no benefit. Modern engines designed for 87 do not produce more power or better mileage on higher octane.
The cost of using premium when you don’t need it
AAA research has found that American drivers waste billions of dollars a year buying premium gasoline for vehicles that only require regular, without measurable gains in performance, fuel economy or emissions. Octane is a measure of resistance to engine knock, not of “energy” or “quality”, and all grades sold in the U.S. must contain detergent additives.
Saving on premium if your car needs it
- Compare stations: the premium markup varies more between stations than the price of regular.
- Use a fuel-rewards card or warehouse club where premium is often discounted.
- Track the trend on our gas price trends page – premium usually follows regular with the same timing.
Frequently asked questions
How much more is premium than regular?
In late October 2026 premium averaged about $1.00 per gallon more than regular nationally ($5.275 vs $4.269, EIA).
Does premium gas improve mileage?
Only in engines designed for it. In cars made for 87 octane there is no meaningful gain in mileage or power.
What happens if I put regular in a car that requires premium?
Modern engines adjust timing to prevent damage, but performance and efficiency drop and persistent knocking can harm the engine. Follow the owner’s manual.