Hi, I recently bought an 87 z31 5 speed N/A less than a week ago and have been eagerly learning about the vehicle but can't seem to find a solid answer to my fuel issues. I have an analog dash in which the gas light is always illuminated. The main fuel gauge seems to reach empty when I fill it up but the car will only accept roughly 5 gallons of fuel. I have read something about a secondary reserve tank but am still clueless where to look first. Thanks!