The average price of a gallon of diesel hit $5.680 on Wednesday, marking the highest price since July 7, 2022, according to data from GasBuddy.That's only 13.9 cents away from an all-time high average price and the highest numbe r it has reached this year, the company noted.This notable record comes just one day after President Donald Trump met with nearly a dozen small, mid-sized and large refiners and distributors at the White House to make clear he wants to see prices fall at the pump, according to administration officials.RELATED STORY | Trump meets with oil executives at White House in push to lower gas pricesMeanwhile, the national average for a gallon of regular unleaded gas is at $4.096, based on GasBuddy data. That number is up 4.4 cents from last month's average and up 90.3 cents from last year.The highest recorded national average for a gallon of gas was $5.034 in June 2022.RELATED STORY | Fed report finds rising gas prices have lasting effect on inflation expectationsExperts said this Labor Day weekend could be one of the most expensive on record as far as gas prices go. ...read more read less