Gas prices continue to rise on Long Island. Mobile in...

Gas prices continue to rise on Long Island. Mobile in Garden City on Old Country Road is currently selling regular fuel for $4.199 a gallon. (April 20, 2011) Credit: Chris Ware

The national average for gasoline prices increased slightly Wednesday to $3.837 per gallon, according to AAA, Wright Express and Oil Price Information Service. And here on Long Island, motorists are paying an average of $4.10 a gallon for regular.