I have a 2000 4runner and in my gas tank right now i have in between 3/4 and 1/2 a tank. I am going to be traveling 106 miles tomorrow and i usually average about 16-18 mpg, the problem today is that i lost my debit card and tomorrow just happens to be sunday when the banks arent open to get a new one, so i need to know how much gas i have in my tank right now. this may be the worlds dumbest question, but ive seen posts here that say the tank size is 15g and ive seen 18.5 so im trying to figure out if what gas i have now would get me where i am going.