I know it's always tempting to believe certain things, but getting better gas mileage on a modern engine is wishful thinking. This is because if you consider some steady-state operation- like cruising down the freeway- you're only at part throttle and likely at 1500 rpm or so. At that airflow rate, an air cleaner, an exhaust or octane won't make a difference.
But what about "tuning" you ask? The only practical way to increase gas mileage by tuning is to run a lean mixture. But, because of the closed-loop fuel control the ECU will just adjust itself back to stoichiometric. And no reputable tuner is going to do something to mess with emissions and get a visit from the EPA. Another option would be to lower pumping losses by using the variable valve timing to optimize the EGR. Of course, this assumes that the existing programming is sub-optimal and given the impact of fleet fuel numbers, I doubt Ford screwed that up.
I woukd agree somewhat
My experience was two long legs at 75
Even though the speed was pretty much dead on, I still had to slow a few times from slower traffic until passing lane was available,
Also this toll road is far from flat, nor absent of wind from different directions and especially so as large trucks pass you in oncoming lane... it is a 2 lane toll road, yes I know how dumb. It has several cut out of passing lanes, if vehicle in front is at 70 and speed limit is 75, in mile passing lane you still can blow through 80 in gnats eye. My experience simply was vehicle was imo more easily doing taking over with less go pedal applied, thus a slight gain in fuel burned.
It also on the long climbs and headwinds, Didn't down shift as much and was able to stay at 74. 75 without as much effort.
This is another reason a boost and egt gauge should be in at least 2 of the driving modes screens, sport, eco , and towing. Pick 2
If you drive and pay attention to boost and egt, you know immediately fuel is trimmed or your dumping it or your in the middle zone
All of my superduties, I used egt and boost to maximize mpg and such while pulling our heavy rvs. It's not all about mph. Some loads result in middle boost, Low egts at 65 and some at 70, or slower
Most people don't give a crap.
my 40 foot motorhome, 1700 to 1800 rpm with the 8.3 cummins is its sweet spot, this happens to correlate to 65-68 mph, for best fuel burn, egts that are in the 750-900 f range and boost at 20-25 lbs .. since 2009...rock solid 7.5 mpg
But for those of us that like to see differences however small or large based on personal driving habits, it's educational
Just like flying, get to altitude, trim fuel , look at manifold pressure etc and set best rpm,load etc to maximize gains in distance and engine performance
In a car, 0 to speed in a timely fashion burns less than playing turtle at slow to speed
Not wot, just timely
Now about the video
The guy explained the tow ratings change very well
Above 5k your in another zone and truck or expedition or large vehicle is best suited
Yes I agree
