I have a ford f 150 I fill the tank up drive sensibly and get 136 miles to a full tank of gas I know this is not normal it does not hesitate sputter or stall check engine light is not on what could be the problem please help

See if this helps:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-honda-civics-46563-4.html#post293582