Prices for the most part have remained steady, but that probably won't last. With demand growth expected to outstrip modest growth in supply, higher retail prices seem likely.

With crude oil prices continuing to hold steady, diesel prices are expected to do the same. But the risk that an unforeseen event could spark volatility remains.

Diesel fuel prices will remain high, but—barring any major, unexpected disruptions in the crude oil market—dramatic price swings are unlikely for the time being.