SPARK PLUG RECOMMENDATIONS CORRECT USAGES

SOME PUBLISHED INFORMATION FROM SOURCES INDICATE THAT THE COPPER TIP SPARK PLUG #R44CXLS (GM #8990424) IS A DIRECT REPLACEMENT FOR THE STANDARD #R44XLS (GM #8990440). IN SOME ENGINES THIS MAY BE TRUE. HOWEVER, TESTING IN THE 1.8L OHC-FI, (ENGINE CODE O), INDICATES SOME DEGREE OF PERFORMANCE MAY BE LOST AS A RESULT OF USING THE #R44CXLS PLUG. PONTIAC IS THEREFORE, NOT RECOMMENDING THE USE OF THE #R44CXLS IN ITS 1.8L OHC-FI ENGINES. NOTE: THE #R42CXLS PLUGS USED IN 1.8L MPFI ENGINES, (CODE J) ARE NOT AFFECTED.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.