News 100-Octane, Super Premium Fuel Is Coming to a Pump Near You Expect higher efficiency, performance—and prices across the board. Eric Brandt Sep 18, 2020 7:07 PM EDT ...

If premium is recommended, this is the engine's optimal fuel. It'll run on regular—albeit with the sensor invoking ignition timing that's less than that associated with MBT.

Still, if your vehicle is tuned for regular-grade gasoline, “It does not benefit you, in most cases, to put premium fuel in,” said Juriga. Keep that in mind the next time you fill up.

Midgrade, a mix of regular fuel and premium fuel, has a rating of 89 or 90 while premium is somewhere between 91 and 94, according to the U.S. Energy Information Administration.

Depending on where you live, premium fuel could be defined as 91 (mostly in Western states) or 93 octane (much of the U.S.) while regular is 87 octane in much of the country while it can be as low ...

A gas pump displays the price of fuel at a gas station in McLean, Virginia, June 10, 2022. (Photo by SAUL LOEB/AFP via Getty Images) “It just depends on the retailer and what kind of additives ...