I have a 2008 Mazda 3. When the temps get to about 30 degrees F, the car will not start. Sometimes it will, but usually not. I turn the key, lights, radio, fan come on but, it does not even attempt to turn over. Here is what I have tried. Realy switches, new key, multiple batteries of of the highest quality. In fact, I pulled the battery out of the Mazda and put it on my toyota sequoia when it was 10 degrees to prove a point and it turned it right over. I have know idea what to do. I only have about 6 months of worry free starting with this car out of the year. Any help qould be appreciated, thanks.