diminishing fuel efficiency

  1. M

    Poor fuel efficiency

    I’m driving a 2009 Taco with 145K cross country hauling a 3000lb trailer. Currently in eastern SD. My mileage per gallon has in 2 days dropped from 12 to 6. Does anyone know if the regular gas they sell here has that dramatic of an effect on efficiency? Or is there something more dramatic I need...
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