F 250 vs Ram 2500

ShinerBock wrote:

4x4ord wrote:
Shiner you are misusing data to try to proof something to be that isn’t. You just have to trust me when I say the increase in fuel economy from the 17 to 21 Powerstroke is astounding. I feel like I’m standing in front of a hippopotamus and you’re convinced you can get me to believe I’m looking at a giraffe.

So you are telling me I cannot trust Fuelly, not trust the EPA fuel mileage test(which Ford performs) from other 6 to 10 speed vehicles, not trust all our fleet data from our 10-speed half tons and Superduty's, not trust ZF and many other transmission manufacturers, but trust TFL and you when you say you a 10-speed transmission increased your fuel mileage 23%. Sorry, but no. And I don't even think Ford would back you in saying that a 10-speed transmission increases fuel mileage by more 10% let alone 23% like you are claiming. In fact, if I remember correctly from of their slides about the 10 speed, even they said expected fuel mileage increase of 6-7%.

I’m saying you’re wrong. Your fleet data and Fuelly are not in anyway intended to be scientific tests designed to measure fuel economy in one vehicle vs another under identical conditions. You could perform a more scientific test than that taking two different trucks on a five mile test drive. There is no way that the 10 speed can account for the dramatic improvement in fuel economy from the previous Powerstroke to the present. I’ve had 5, 6.7 Powerstrokes prior to my 2021s and they all got fairly similar mileage. 18 mpg US was about the best I remember seeing out any of them, and that would be at about 62 mph. My 2021 is able to do 21.5 at 70 mph and I’ve seen 23 mpg on one occasion. The day I picked up my 2021 we ran one of the 2017s and the ‘21 one behind the other for 120 km. It was kind of a windy day and neither truck was performing its best. Both mpg meters are calibrated. The 2017 read 14.5 litres per 100 km (16.2 mpg) and the 2021 read 11.8 litres per 100 km (19.9 mpg US) I have since travelled that exact same stretch of highway and measured 10.2 litres per 100 km with the 2021. These mpg figures are for comparison purposes only as none of them take into account fuel lost to cleaning the DPF.