Hi I was wondering what everyone can get out of a tank on a 92' ford explorer? How many miles about? I'm getting about 260-290 miles per tank running it almost out. My parents have a 96 model and get 350-380 per tank, they also have a 21 gallon tank and I have a 19. Please let me know what you get as I am interested in comparing, I dont think im doing so well in the fuel mileage department and I have a k&N filter use valvoline synthetic oil....thanks!