BEL-RAY EXS SYNTH ESTER 4T ENGINE OIL 15W-50 (4L), Manufacturer: BEL-RAY, Manufacturer Part Number: 99162-B4LW-AD, Stock Photo - Actual parts may vary. &nbsp;Synthetic ester infused with Extreme Pressure (anti-wear additives) &nbsp;Lowers engine temperatures and increases horsepower &nbsp;Longest change intervals &nbsp;For air-cooled / liquid-cooled 4T engines with wet clutches API SM, JASO MA2