Originally Posted by colt149

Spark plug (Platinum-tipped type): Make NGK Standard type PLFR5A-11 Hot type PLFR4A-11 Cold type PLFR6A-11 Use standard type spark plug for normal condition. The hot type spark plug is suitable when fouling may occur with the standard type spark plug such as: I frequent engine starts I low ambient temperatures The cold type spark plug is suitable when spark knock may occur with the standard type spark plug such as: I extended highway driving I frequent high engine revolution Gap (Nominal): 1.1 mm (0.043 in) : 20 - 29 N·m (2.0 - 3.0 kg-m, 14 - 22 f

Originally Posted by maxinout93

So will NGK Iridiums be good for this engine also? Saw a set on ebay part # LFR5AIX11 for a good price. Its pretty hot here and i do a mix of city and highway driving so im thinking i may need a cold plug.

Originally Posted by DennisMik

Outside temperature doesn't determine if you need a colder plug. You might need a colder plug if you were towing a loaded trailer, which is putting a heavier workload on the engine. Standard plugs are fine otherwise.