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.
High-octane premium gas dropped, on average, by only 37% to $2.49 a gallon. As a result, the price spread between premium and regular unleaded has spiked to a record high above 40 cents a gallon, as the chart below makes clear. View photo.Price difference between premium & regular unleaded gasoline per gallon (1994-2015).n a percentage basis, premium gas is now more expensive vs. regular than at virtually any time in the past two decades. The last time premium was priced more than 20% above regular was a brief stretch in 1998 â when regular unleaded cost just over $1 a gallon.