Gas prices for Italy-based servicemembers and eligible civilians will go up Jan. 1 because of an increase in contracted petroleum prices and the weakening U.S. dollar.

Prices will rise about 11.5 percent for unleaded and diesel automobile gasoline, motor oil and liquid petroleum cooking and heating gas.

Even with the increase, unleaded gas prices will still be 5 cents less per liter than they were in June. In July, prices were lowered to the current levels.

The cost of a book of coupons for 100 liters of unleaded gas will rise to $44.50 from $39 on New Year’s Day.

Tax-free petroleum products are sold to U.S. and NATO personnel and eligible civilians in rationed coupon books. The U.S. Navy manages the program for all military services in Italy.

The Army and Air Force Exchange Service manages the gasoline program in Germany and some other European countries.

Those eligible can purchase up to 400 liters of unleaded gas coupons per month, based on the engine size of their primary vehicle.

The Defense Energy Support Center in Norfolk, Va., contracts petroleum purchases and works with the Naples-based Tax-free Program Office to set prices. Tax-free Products Administrator Sergio Martirano was unavailable for comment Monday.

Coupons are accepted at Agip and Esso gas stations in Italy. However, a few other stations near some installations have been authorized for coupon use.

In Naples, coupon users can purchase gas at a Fina station on the main highway between the Gricignano housing area and Capodichino base.

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