Welcome back to the grind The national average gas price has gone up again. It's climbed 1.2¢ since last week at $2.407 - this time last year it was $2.113 so it's 13.9% (+29.4) more expensive. Diesel is only up 1.5¢ at $2.532. It's now 19.5% (+41.5¢) more expensive than this time last year. Diesel is at a reducing 4.9% premium to regular.