I did a road trip of about 5 hrs. yesterday. It was the first long one that I did since installing my Injen cai. With a base auto I got 30 mpg. averging 80-85 mph. on I 5. That is what I used to get with no mods at 70-75 with less power. I am pleased with that because my mpg. in town has gone down when I drive it hard. I did not see a single Matrix but saw one Fusion Vibe. Where are all the cars?