MH>So the oil is actually thicker at hot temperatures or when it is hot outside   
   MH>you are using a 10w 30?  10w for cold and 30 for hot?   
      
   That is corect. A 10W-30 is the same as a 10 weight when it is cold but   
   the oil changes as it warms up to the equilivent of a 30 weight when   
   hot.   
   Here in SAn Diego California where the weather is fairly mild   
   I had been running 20-50 oil in my cars.   
      
   I have recently changed to using a full symthetic and will be using the   
   10-40 in my older truck with a little over 100,000 miles on it.   
      
   Becasue of the increased gas miledge helps then meet the CAFE standard   
   most car manfacturers recommend the 5-30 or 0-20 in their new cars   
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    þ SLMR 2.1a þ Typo Tom strikes agaoin   
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