Well, you shouldn't really start a new thread for this, but in any event vinyl will fade with time and exposure to direct sunlight. So if you park outside it will fade faster.
Vinyl will also last around 3 or 4 years (this high performance 1mm vinyl anyway) but that's just staying on the car, not color fade.
For a $5 mod you should expoect and probably be worth it to change it once a year when it goes through the rough seasons
