The GasBuddy national average gas price fell -1.1 cents to $3.02 last week. This is -0.9 cents below a month ago, and -3.2 cents below a year ago. The national diesel price increased 3.7 cents to $3.525. The median U.S. diesel price is $3.42 per gallon, up 3 cents from last week and about 10 cents lower than the national average.