Hey everyone, got the car back today.
They fixed my door insulation (thank God, the car was WAY too loud), but no luck on finding the cause of my bad MPGs. They checked MAF, filters, injectors, etc. They even said injector cleaning at 30k is part of their maintenance plan.
On the upside, Andy is the Master tech at Tustin Mazda, and he is the most awesome tech from a dealer I have ever talked too. Per my personal request, he took the car in the back and gave me all the diagnostic print outs to see if anything came up. Nothing did, but still nice of him to do so.
Other than that, I guess I will be going the fuel additive route to see if that helps as it did in your case.
Other than that, the only thing I can report is that I am due for tires and I am going with Michelin Pilot Super Sports. I will do some canyon carving and report back. Soon, I am planning on adding a swaybar and upgrading to EBC pads and rotors, and also adding in a drop in filter. Nothing major to the car after that. MAYBE some auto.exe stuff, but without Torsional-Stiffness here to answer my questions I am holding off!
Did they check the intake Valves? Oh, well, someday somebody will.
BTW I noticed my mileage dropping too, so I dumped the techron in the current tank. I also checked my tires for the first time since the warm fall and they were down to 25psi...ok that explains it. So I got them back up to 35ish, and I expect mileage to substantially improve. With the colder weather it definitely drops the tire pressure. Interesting the TPMS never said boo. That explains the recall, but man I don't want any warnings flashing at me all the time like it has been for some people.