Mobil share of the retail petrol spend has suffered at the hands of the Coles Myer and Woolworths discounted fuel strategies and has jettisoned the WA business to protect the bigger markets in the east.

Mobil is the second fuel retailer in WA to exit the market so far. The Wesfarmers-backed Kwik Fuel wound back its roll out plan earlier this year after deciding it was not profitable.

Mobil's Kwinana distribution and storage terminal, as well as its 18 petrol stations in the Perth metropolitan area, are understood to have been put on the market.