As concerns over debt in Greece have not abated, Crude oil prices held under $80 a barrel Wednesday on the New York Mercantile Exchange.

It was reported that June delivery crude oil prices have fallen more than $6 since Monday, shedding $3.14 from a prior settlement to $79.60 per barrel. Prices are dropping with a rise in the dollar triggered by concerns Greece could default on its debt, despite international aid.

Climbing 1.05 percent, the dollar index reached a 12-month high Wednesday.

While Greece's economy is small, the worry is that its economy could be the Achilles heel for the euro, the currency used in Greece and 15 other countries.

Loosing 0.0745 cents, heating oil futures for June reached to $2.185 per gallon.

Reformulated gasoline blend-stock prices lost 0.0822 cents to $2.24 per gallon.

It was further reported that Henry Hub natural gas futures for June shed 0.022 cents to $3.991 per million British thermal units.

According to the reports of AAA, at the pump, the national average price for unleaded gasoline was $2.919 per gallon Wednesday, up from Tuesday's $2.904. (With Inputs from Agencies)