May 11 (Reuters) - Caltex Australia Ltd CTX.AX :
* Q1 PROFIT AFTER TAX WAS $155 MILLION VERSUS $154 MILLION
* STATUTORY Q1 PROFIT AFTER TAX WAS $172 MILLION VERSUS $161 MILLION
* Q1 AVERAGE REALISED CALTEX REFINER MARGIN US$9.40 PER BARREL, DOWN US$2.82 VERSUS BARREL FROM PCP