June 20 (Reuters) - Caltex Australia Ltd CTX.AX :
* Asx alert-Caltex refiner margin update (May 2017)-ctx.ax
* May unlagged CRM was US$9.94/bbl
* May 2017 realised CRM was US$9.94/bbl Source text for Eikon: ID:nASXb0yr3T Further company coverage: CTX.AX