XPost: misc.phone.mobile.iphone, comp.mobile.android   
   From: lcargill99@comcast.com   
      
   Paul M. Cook wrote:   
   > On Fri, 11 Dec 2015 11:22:34 -0500, nospam wrote:   
   >   
   >> in other words, getting a higher octane fuel is not a waste, just like   
   >> i said.   
   >   
   > If the car isn't knocking, then there is zero advantage to higher   
   > octane rated fuel.   
   >   
   > The manufacturer specifies the fuel to handle *all* conditions; but,   
   > if you know that you're not knocking (you have to poll the DME   
   > to know this), then you also know you don't need the higher octane   
   > fuel.   
   >   
   > Plus, engines that don't knock on, say, 87AKI, can't possibly   
   > benefit from, say, 91AKI.   
   >   
   > This is stuff many people don't understand.   
   >   
      
   Pure anecdote here:   
      
   If you run a tank of 91 thru a vehicle say, once a year, my   
   experience is that after a couple tanks of 87 after,   
   you'll get slightly improved mileage.   
      
   The ECM gets "bored".   
      
   --   
   Les Cargill   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)