SINGAPORE, Jan 29 (Reuters) - Pakistan State Oil PSO.KA is set to import up to 1 million tonnes of oil products for delivery over February to April, industry sources said on Tuesday.

The state-owned firm will likely buy six cargoes of 50,000 tonnes each of 87-octane gasoline for delivery from March to April - four from PetroChina and two from Swiss Singapore.

PetroChina's offer was the lowest with premiums ranging from $93.70 to $96.70 a tonne over Middle East naphtha quotes on a free-on-board (FOB) Fujairah basis, the sources said.

Swiss Singapore's was the next lowest offer with premiums of $94.44 a tonne, also on a FOB Fujairah basis.

PSO did not receive any offers for two optional gasoline cargoes it had sought.

For high sulphur fuel oil, PSO is set to buy eight cargoes of 65,000 tonnes each for delivery over February to April from PetroChina, Bakri, Vitol, Trafigura and Horizon Energy, the sources added.

The premiums range from $10.50 a tonne to $16.84 a tonne over Middle East quotes on a FOB basis.

Horizon Energy will likely load its fuel oil cargo from Khor Fakkan while the rest will load from Fujairah, the sources said.

For low sulphur fuel oil, Vitol and Gunvor placed the lowest offers, one of the sources said. But details of the offers were not immediately available.

PSO is seeking up to 180,000 tonnes of the fuel.

The tender closed on Jan. 28 and is valid until Feb. 8.

Following are details of the offers:

PRODUCT DELIVERY PERIOD SELLERS PRICE*

Gasoline 87RON March PetroChina $93.70/tonne (50KT each) March PetroChina $93.70/tonne

March Swiss Singapore $94.44/tonne

April PetroChina $96.70/tonne

April PetroChina $96.70/tonne

April Swiss Singapore $94.44/tonne High sulphur Feb 15-April 30 PetroChina $10.50/tonne Fuel oil Feb 15-April 30 PetroChina $12.75/tonne (65KT each) Feb 15-April 30 PetroChina $12.75/tonne

Feb 15-April 30 Bakri $16.72/tonne

Feb 15-April 30 Bakri $16.72/tonne

Feb 15-April 30 Vitol $16.21/tonne

Feb 15-April 30 Trafigura $16.84/tonne

Feb 15-April 30 Horizon Energy $16.34/tonne

*prices are premiums to Middle East benchmark quotes and are on a free-on-board (FOB) basis

(Reporting by Jessica Jaganathan; Editing by Himani Sarkar)

((Jessica.Jaganathan@thomsonreuters.com)(+65 6870 3822)(Reuters Messaging: jessica.jaganathan.thomsonreuters.com@reuters.net))

Keywords: PAKISTAN OIL/IMPORT