Ok the results are in. Doing this maintenance has improved my fuel economy. It used to be that when I filled up clear to the brim I could drive at 65 mph (easy driving/empty) and get to 131 miles before the needle moved. Now after replacing this sensor and tube I'm at 145 miles and still going, needle has not moved...I've even done some in-town driving and romped on it once. I'm REAL curious as to what mpg I'm gonna get this tank!!!!!