from what i've discussed with other sportage owners, it's been hit or miss as to how far a full tank will take you. By that I don't mean MPG but rather fuel tank capacity. My girl's 97 sportage specs read that it's got a 15 gal tank however, she can only ever put less than 14. In fact, when she gets to 13 and up, the truck starts to sputter. No visible signs of damage on the tank. My 2k on the other hand gets darn near the full 15 when i run it low. ONE time, i was able to put a tick over 15 in it. She usually gets roughly 23+ MPG in her 97. I usually get 20-22 in mine.