RW>Most vehicles I can afford to run use enough oil that I'm   
   RW>rotating fresh oil through there anyway .  YEah change the filter at   
   RW>about double that, but otherwise, there's   
   RW>enough fresh oil in the crankcase.  tHe GMC van Kathy just   
   RW>rolled seemed to need a quart about every 3-4 runs to   
   RW>MEmphis and back, figure round tripper on those 100 miles,   
   RW>so by the time 3k miles rolled around between last oil   
   RW>change  oil was changed out just in natural course of   
   RW>events.   
      
   I used that method myslef for many years when al I could afford to buy   
   were "Oil Burners".   
   And it works great as the additives and viscosity enhansers are what   
   gets used up and replacing 20% or so of the oil frequently keeps it   
   fresh!! :-)   
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    þ SLMR 2.1a þ 0     
    * Origin: Doc's Place BBS Fido Since 1991 docsplace.tzo.com (1:123/140)