average GPM concerns
OK so I took my first trip that was more than 40 miles down the road. My 2000 F150HD 5.4L gas and the drive train in the truck are rated for 8700 towing, my 5ver was at approx. 7600, I was hoping for ...
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patnchris wrote:
I find this very interesting. I am towing the trailer in my sig. It is around 7800 -8500 lbs. I tow with a 2007 F150HD, 5.4. 373 gear. I tow with OD off at around 65 mph and almost never use cruise. In approx 6000 miles towing, over the last two years, I am averaging right at 10 mpg. I did switch all lubes to synthetic, but wouldn't think it would make that much difference. Is it possible that keeping the 5.4 closer to it's power band makes a difference. Usually runs around 2500 rpm.
someone had gave me advice on a thread and it was to look at rpm more than speed, find the "sweet spot" that will "getter done" I wonder if I can track down a curve on that old truck ? may try, 2500 rpm is slightly slow in my truck, 2800 is pretty smooth going, 3000 to 3300 up small grades.
