Modern gasoline direct injection (GDI) engines have achieved levels of power and fuel economy never before possible in passenger car engines. As a result, smaller engines operate at much higher loads across all engine speeds. This has caused increased wear in critical areas of the engine, and created a destructive phenomenon called low-speed pre-ignition (LSPI). The unique, state-of-the-art additive technology in Royal Purple High Performance engine oils is designed specifically to address these issues, and help engines maintain performance and reliability.

This Part Fits:

Year	Make	Model	Submodel
1986-1987	Isuzu	Trooper	DLX
1986-1989	Isuzu	Trooper	LS
1986	Isuzu	Trooper	LX
1989-1990	Isuzu	Trooper	RS
1988-1991	Isuzu	Trooper	S
1988-1989	Isuzu	Trooper	XS