In addition to gasoline prices declining, the average price of a gallon of diesel will join gasoline in the days ahead, falling below $4 per gallon in the next 48 hours or so, a sign of how far we've come says petroleum analyst Patrick DeHaan.
.Oil prices remain a wildcard, but we're likely a few weeks away from seeing the national average peak. Whether it hits $4 per gallon or not is still perhaps a 50/50 chance, says petroleum analyst Patrick DeHaan.