MPG experience
While I only do highway cruising without towing - and I have only 30K on my 2003 F350 Centennial Crew with LWB - I have always gotten exactly17 mpg on the highway at 78-82 mph and 16.9 when on local trips. My mpg doesn't seem to change much at all whether I'm at 70 mph or 82-5...
Have a steady check engine illumination; first for my 2003 F350 Centennial Crew with low (30K) mileage. Truck is used for 2-3 road trips per year and no towing - most miles are Interstate highway at 78-82 mph. Has been cold here and I have used engine block heater when temps get below 28F -...