Biannual SHOULD mean twice a year. Every two years is biennial. But my dictionaries say biannual MIGHT also mean every two years. Probably everybody is so confused about the two similar words that they don't know what biannual means.
According to U.S.A. Today âs âWeekend Gas Gauge,â the current average price of regular gasoline is $4.026 per gallon. A year ago the price was $2.945. What I hadnât realized was that the gap between regular gas and premium gas has also increased.Right now, premium gas is 38.5 cents per gallon more expensive than regular gas.A year ago, that gap was 29.5 cents. year ago the price was $2.945. What I hadnât realized was that the gap between regular gas and premium gas has also increased. Right now, premium gas is 38.5 cents per gallon more expensive than regular gas. A year ago, that gap was 29.5 cents.
As Automotive News reported, there are gas stations around the country charging 50%, 60%, and even 82% more for premium gas compared to regular. From 2010 to 2014, a gallon of premium gasoline cost 7% to 10% more than regular, on average. In 2015, however, the price difference leapt to 17%, and in February 2016 it was up to 27%. In terms of real prices, in 2010 and 2011, the average gallon of premium cost around 25Â¢ more than regular. By 2015, the difference was 40Â¢, and last month it hit 48Â¢. There is no single reason why there's now a larger premium for premium gas.