22 Mar 12 04:36, Roger Nelson wrote to Roy Witt:   
      
    RW>> Even easier on a Ford with the coil pack being used as the plug   
    RW>> wire.   
      
    RN> Admittedly I've been away fromm this stuff for quite some time, but I   
    RN> have yet to see a spark plug that would last 145k.   
      
   They obviously do...they're just not as good as they were at 100k or   
   50k...   
      
    RN> The ones I bought for the Mark VIII have a recommended replacement of   
    RN> 75k.   
      
   In a 145k car, that would take it into the next stage of the engines life.   
   By then, in that overhead cammed engine, it will have already gone through   
   at least three timing belts/chains.   
      
    RN> I've only put 12k on the car since I bought it, so the ones I put in   
    RN> it 2 years ago should last awhile longer, I think, unless all this   
    RN> city driving I do shortens that life span, which I'm sure it will.   
      
   Only if you used cheap plugs to replace the factory plugs.   
      
      
                   R\%/itt   
      
      
     ... Only those who will risk going too far can possibly   
     ... find out how far one can go ~ TS Eliot   
      
      
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