I know that this will sound like a stupid question but how can I determine what size gas tank is on my 2020 RAM Limited, 5.7 engine. I never let my gas tank get below half full during the winter so I can't tell by letting the gas tank run low. My owners manual state that I have a 23 or I believe a 26 gallon tank. I do know that it is not a 33 gallon gas tank.