With the price of regular unleaded gas still in the $4-a-gallon range, the comparative price of premium is kind of a bargain at many stations. Really.
With the price of regular unleaded gasoline still in the $4-a-gallon range, the comparative price of premium is kind of a bargain at many stations.When the price of regular surged this spring, the percentage difference between regular and premium at many stations actually narrowed — most likely so drivers will keep buying premium.
He recommends that his customers step up to 93 octane premium every five or six fill-ups, even if their car is designed for 87 octane. In an undated post, AAA said it found no increase in power or fuel economy when running 93 octane in cars designed for 87 octane. But those tests were conducted with cars that were just two years old.
Drivers “will feel more improvement if they drive cars with smaller four-cylinder engines than larger engines,” he said. “But it also improves performance of six- and eight-cylinder cars. Older cars might feel more improvement because they typically have more residue and carbon built up over the years.”
Many of those are performance or luxury cars with highly tuned engines that need that extra octane to run at peak levels. But more and more “ordinary cars and crossover SUVs” require premium, Forbes reported in 2020, “due largely to more widespread use of higher-compression turbocharged engines for the sake of added power without sacrificing fuel economy.”
But cars that require premium are more likely to knock and ping when fed lower-octane gas. On the highway especially, the misfiring will lead to carbon buildup, Cenzano said.
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