Even with petroleum diesel at $4 per gallon, farm-based renewable fuel can't compete on price. By Marianne Lavelle. + More. The retail cost of highway diesel fuel is $3.99 per gallonâthanks to tough environmental rules and strong global demand, especially in Europe.The national average retail price of diesel hit an all-time high for five weeks in a row, is above $4 per gallon in plenty of places, and is up 50 percent over one year ago.he national average retail price of diesel hit an all-time high for five weeks in a row, is above $4 per gallon in plenty of places, and is up 50 percent over one year ago.
When the day of the month and the year appear side by side, a comma is used to separate them. For example, in July 21, 2008, a comma separates 21 and 2008.. Use a comma to separate words. When the day of the week and the month appear side by side, a comma is used to separate them: Monday, July 21, 2008.
Dates and commas. Style guides differ on how to use commas with a month-day-year date (the American style) in the middle of a sentence, but the standard practice in U.S. publications is to place a comma after the day and another after the yearâfor example: