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Old 06-18-2021, 07:49 PM   #31 (permalink)
JSH
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Quote:
Originally Posted by Hersbird View Post
I agree to some extent, but energy required is energy required. Physics is physics. That Ford Ecoboost is not a thermally efficient engine. The final gearing should have not really come into play as they weren't running in the highest overdrive, nor were they accelerating for more than a few seconds of the overall mountain at the very bottom, the least steep part. So the rest of the way the Ford's 10 speed should have been able to find the right gear for the right RPM even better than the Rams's 8 speed.
Having watched the video I don't think we can get any usefully fuel economy info from this "test"
  • They drove different routes
  • They drove up the pass in the Ram in the dry and the Ford in the rain
  • The Ram was the eTorque hybrid which allowed the engine to turn off on the downhill.
  • They drove the Ford in Tow / Haul mode which doesn't let the engine ever turn off
  • They made no mention of the state of charge on either hybrid battery
  • The driver said he was on and off the throttle a lot in the Ford because it had so much more power while the Ram was easy to stay at a steady 60 mph
  • They do full throttle acceleration which wastes a HUGE amount of fuel with a turbo
  • They lugged the Ford up the pass at 2300 RPM instead of selecting a lower gear for better fuel economy
  • They are going by calculated fuel economy from the gas pump but only putting 3.6 gallons +/- into a 36 gallon tank. That allows for a lot of error in filling.
  • They only did one run in each truck which allows traffic to be a pretty big factor.

The Ram's trip computer said 8 mpg and the Ford's said 7.9 mpg

If they wanted to test fuel economy they should should have:
1. Run the same route in similar conditions
2. Run it multiple times to reduce the effects of traffic
3. Drain the tank near empty to reduce fueling variation.


In short this is not a scientific test or repeatable.

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