Does anyone know what spark plugs are recommended for a 1993 SL1 with SOHC? Does it have a "wasted spark" system? Mine appears to have two coils which would indicate "wasted spark". Since, in a "wasted spark" engine one coil services two cylinders - one off the positive pulse and the other the negative, dual platinum would be indicated. The "wasted" spark occurs when one coil fires two cylinders simultaneously, one in the firing and the other in the exhaust cycle.
Gary