Guam - It's going to cost you more when you head to the pumps, as Mobil and Circle K/76 service stations have increased the cost of a gallon of gas by $0.10.  Unleaded fuel prices have now jumped to $3.89 a gallon, while premium fuel is now $4.19 a gallon and Diesel is $3.96. 

As of 6pm Wednesday, some Shell stations had not increased their prices. None of the fuel companies have announced the reason for the jump in fuel prices.