For graduation I am getting a car. I was looking at the Is350 when I stumbled upon a few used 08 Lexus Isf's for around 40k. I did some research and basically fell in love with the car until I realized one problem... How am I going to talk my dad into it. He is very conservative but to me this car actually seems very practical. It's rated at combined of 18mpg is that true? That is very good for 416HP. It also has 4 doors,4 seats,decent trunk,and many gadgets/safety features. I want to tell him it's sort of a investment because they will retain their value much more than a regular is. I have a 15k trade in so 25k for a IS-F? I would like to hear from some current owners about reliablity,gas mileage, every day driver practicallity? I know you don't look at this car for gas mileage but I am not one to go floor it at stop lights and everywhere aroundtown. Maybe some occasional fun and occasional quarter mile track use.I also heard people having issues with squeaky brakes. Is this common for all of ten or just a select few? Last thing I wanted to know roughly how much money are the maitenence checkups every 10k miles?Please help me anyone. Thank you very much for taking your time to read and respond!