got my wife a 2001 aztek yesterday , its in real nice shape and runs and drives super smooth , anyways the guy i got it off of ( small little off the wall dealer ) said he just filled the tank to the top , well weve gone a total of 100ish miles already and the gas gauge hasent moved off of full , maybe were just use to driving a gas hog but damn it hasent even budged off of full , i looked up the specs of the tank and it says its like a 18-19 gallon tank and the EPA says it gets like 19-20 mpg , sound like a bad sending unit ? or is it just us not use to driving something that gets decent gas MPG ? , and if it is a bad sending unit will the low fuel light still come on ?