A recent winter reprieve in fuel costs has been short-lived. During the week of Jan. 12, the average price for regular gasoline inched up 10¢, or 5.9%, to $1.78 per gallon, while on-road diesel rose 2.3¢, or 1%, to $2.31 per gal, according to the U.S. Energy Information Administration. But prices for both fuels are still considerably lower than a year ago, with gas and diesel ringing up 41.8% and 30.4% lower, respectively. Despite low costs today, the slumping economy threatens to force a rebound in fuel prices later. EIA points to an overall climate of cutbacks for petroleum capital expenditures on the supply side, especially in 2009.