I do BHP, CBA and AP here in Australia - they are the only markets liquid enough to trade in without getting your arse handed to you in slippage.
STO and MTS are a no go - you just cant sell enough premium to balance the risk you are at.
think about it...
You own 200 shares of STO, and you sell 2x30 delta option contracts against your holding for 21 cents a contract, you receive $42, of which $6 goes in brokerage and you will lose another 15% in the bid-ask spread. then lose another $6 when you buy them back . . .
You just cant make money this way. MTS is worse...
Do a couple of spreadsheets to work out your risk vs profit, then you will see the ASX is a very hard trade.
Instead of STO - just buy an OIL ETF and sell ETF options against that, penny wide spreads and is basically the same trade without the risk
The ASX sucks, always has.