i guess i never paid attention??
http://www.mobil1.com/USA-English/MotorOil/Oils/Mobil_1_Extended_Performance_10W-30.aspx
i see they still have the 15w50 EP listed
http://www.mobil1.com/USA-English/MotorOil/Oils/Mobil_1_Extended_Performance_10W-30.aspx
i see they still have the 15w50 EP listed