Hello everyone, I just got my first f150 it’s a 2012 3.5L eco. I’m having a strange issue. I fill my 26 gallon tank all the way up with gas and the gauge will show it’s only 3/4 full. I’ve confirmed multiple times that it is indeed full. The gauge then works fine when it’s comes to showing how much gas I have used but still only shows 3/4 everytime I fill it. I thought it might be the fuel sender but it seems when those stop working the gauge either shows full or empty all the time which isn’t the case. Thanks in advance for any advice.