From: scientist77017@gmail.com   
      
   I use full synthetic oil (non-name brand) and a Fram filter for synthetic oil.   
      
   My car has 109K miles.   
      
   At 7K miles, the oil looked pretty dirty, so I had it changed.   
      
   How long can I expect that oil to last?   
      
   They claim 10K miles.   
      
   One person said he changes the filter midway.   
      
   Thanks,   
                   Andy   
      
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