Through the Petroleum Development Act, 1995, PETRONAS which is  entrusted to  develop  them.  For this  PETRONAS, enters  into   Production   sharing   Agreements   with  other petroleum   companies,   which   explore,   and  develop  the resources. As of 31 December 1999,  the   main   Petroleum companies   which   had   entered  into  Production   Sharing Contracts with PETRONAS were:

These were:-

Downstream

The downstream petroleum sub-sector comprises several activities undertaken by many different players. They are as follows: -

(i)   Crude oil refining

• Petronas Penapisan (Terengganu) Sdn. Bhd.
• Petronas Penapisan (Melaka) Sdn. Bhd.
• Esso 
• Shell

(ii)   Petroleum product retailing

• Petronas Dagangan
• Shell Trading
• Esso
• BHPetrol Malaysia
• Caltex

(iii)  Natural gas processing, transmission and wholesale

• Petronas Gas Bhd.

• Natural gas retailing Gas Malaysia Sdn. Bhd.

• Shipping of crude oil and petroleum products

(iv)  Manufacture of Liquified Natural Gas

• Malaysia LNG

(v). Shipping of LNG