Welcome back to the grind The national average gas price has dropped another 3.7¢ since last week to $2.529 - this time last year it was moving higher at $2.343 so it's "only" 7.9% (+18.6¢) dearer. Diesel is up 2.5¢ at $2.930. It's 15.8% (+39.9¢) more expensive than this time last year. Diesel is at a 15.9% premium to regular. E85 up to $2.100 - a year ago it was $2.003.