I took a test drive in a new Mazda5 (auto) on the highway. When I put the pedal to the floor (only for 15~20 seconds), it shift down to the 3rd gear for the extra power. It's a bit loud as expected and it's acceptable. What bothers me is when I stopped the car and got out, there is a very bad burning smell. The salesman said it's probably the conditioner they put on the engine in the factory for shipping and it will clear out. (uhm) Did you smell anything like this? Will it be related to the exhaust recall?