Two questions on my 87' LX
 

I just picked up an 87' LX 4cl last week, best $400 I have ever spent. The car is very clean. Anyway my gas guage is broke, it gets stuck on full and sometimes will drop down. I filled it and am using the odometer to figure out how many miles I get to a tank so that I can figure out when it's time to fuel up again. How big is the tank? How many miles to the gallon do you get in yours? Please let me know...Dean