This is my first post so hopefully I dont mess it up. I just bought a used 2007 Nissan Titan crew cab with 21k miles on it. I love it! But it gets crap gas mileage (I know, what did you expect from a truck?). I just saw on ebay that they sell a DT fuel saving module for 9 bucks. It claims it will get me at least 4-7 more miles per gallon PLUS give me more horsepower. Now I dont know a lot about trucks but this seams to good to be true and the price seams to good to be true as well. It also claims it will not void my warranty. I am not worried so much that it will not work (I have 9 bucks to throw away) I am just worried it will blow my truck up or screw with the computer. Anybody have any experience with these? Does anyone know if they work or if there is anything like this that works? The store is Dynamic Tuning. Thanks in advance for your comments.