From: scientist77017@gmail.com   
      
   On Tuesday, September 6, 2022 at 11:54:44 AM UTC-5, Scott Dorsey wrote:   
   > AK  wrote:   
   > >My 2009 mazda cx7 recommends premium grade gas.   
   > >   
   > >I have been using mid grade for about 5 years with no issues.   
   > >   
   > >I get the advertised gas mileage. 20/28 city highway.   
   > >   
   > >Is my car retarding the timing by that?   
   > Put it on a scanner and see. If you're not driving aggressively, it might   
   > not be. If you're driving aggressively, it might be.   
   > >I read where that can causing knocking.   
   > No, the computer system will retard the timing to prevent that from   
   happening.   
   > It's not like the engines of the seventies where you could damage them by   
   > using too low octane fuel. Now all you lose is performance when the system   
   > pulls the timing back.   
   > >Wondering if regular gas would work.   
   > Maybe, try it. It won't hurt anything. It might not accelerate so well,   
   > but that might not bother you. Or maybe it will. Try it.   
   > --scott   
   >   
   > --   
   > "C'est un Nagra. C'est suisse, et tres, tres precis."   
    I will try regular gas at my next fill up.   
      
   See if there is any performance or mileage changes.'   
      
   Andy   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)