I just got my 2015 convertible about a month ago. It has 3,000 miles and I've been very busy with mods. My first was a Borla Touring Cat back exhaust. I then added a MMR cold air intake and an oil separator. I changed out the plastic coolant tank to add a little color to the engine compartment along with red radiator hoses. Last weekend we added a larger oil cooler and black C-strips to the body. My next free weekend will be a MMR intercooler and the cobra center stripe. The original 50th anniversary wheels have been replaced with black 5 spoke wheels. It sure is fun to drive with the top down and listen to all the different noises. I was getting about 31mpg before the changes, but haven't done a check lately. I hope to get some photos after the center stripe is on. I drove a 66" 6 banger in high school and it wasn't even close to my little 4 banger.