Welcome back to the grind The national average gas price unchanged on the week at $2.838 - this time last year it was only $2.363 so it's 20.1% (+47.5¢) dearer. Diesel is also unchanged at $3.143. It's 24.31% (+61¢) more expensive than this time last year. Diesel is at a 10.7% premium to regular. E85 is also down to $2.422 - a year ago it was $2.005 so 20.8% dearer.