Just cruising on the interstate I could not tell a difference. Not scientific, but no big win for Eco.Has anybody seen a difference between normal and eco drive mode on fuel economy?
I find just the opposite. With Eco and all gears enabled, it gets into boost at the slightest acceleration even going up an overpass and trying to maintain speed.If your truck has turbos, I like cruising using Eco , helps prevent the turbos from kicking in more so than normal. Going up grades and resuming cruise speeds when slowed by traffic. As mentioned , not much of a difference otherwise with both in 10th gear. If you need acceleration in Eco , pedal to the metal.
That is interesting. Rarely does my truck open the turbos, even when accelerating when passing. Perhaps it is a reflection on speed. Here in Canada about the fastest highway speed limit is 120 kmph or about 75 mph. Normal freeway speed between 100 to 110 62 to 68. My typical cruise is set at 117 or around 72 or 73 mph. Grades are not really an issue in my driving area but even a trip in Vermont was basically a normal drive. PB or EB truck. 3:73 gears or something else could also be the difference.I find just the opposite. With Eco and all gears enabled, it gets into boost at the slightest acceleration even going up an overpass and trying to maintain speed.
With my '87 Buick, the turbos are driven almost entirely by exhaust / rpm. My understanding is that modern turbo vehicles are somewhat computer controlled. If this is true and there are turbo maps similar to spark and fuel maps, it would be interesting to see how the turbo map is different between Eco and other driving modes.
I'm going strictly by the boost gauge. At highway speeds, which could be anywhere from 60 - 80mph in 10th gear, if I tip into the peddle to maintain speed as I go over a slight overpass, I can see the boost gauge showing boost. If I lock out 9th and 10th, then I can maintain speed without boost. With my 3.31 gears, I'm only doing about 1200-1300 at highway speeds.That is interesting. Rarely does my truck open the turbos, even when accelerating when passing. Perhaps it is a reflection on speed. Here in Canada about the fastest highway speed limit is 120 kmph or about 75 mph. Normal freeway speed between 100 to 110 62 to 68. My typical cruise is set at 117 or around 72 or 73 mph. Grades are not really an issue in my driving area but even a trip in Vermont was basically a normal drive. PB or EB truck. 3:73 gears or something else could also be the difference.
That's the kind of thing I've noticed. It doesn't seem to give much better mpg, but is smoother when shifting and when using adaptive cruise control. Both adjusting to vehicles in front and reacting to speed limit signs. In normal mode the truck will lurch forward accelerating for a 2 mph increase in the set speed when it senses a new speed limit (example: speed limit set manually to 40, truck sees a 35 mph sign and as I pass the sign it jerks my head accelerating to 42 mph to maintain my set 7 mph over speed limit). I enable it sometimes so the ride is smoother when I am driving my family in it.The biggest difference is it seems to resist turning on the ICE a little more and is much smoother using adaptive cruise in Eco mode.
That's the kind of thing I've noticed. It doesn't seem to give much better mpg, but is smoother when shifting and when using adaptive cruise control. Both adjusting to vehicles in front and reacting to speed limit signs. In normal mode the truck will lurch forward accelerating for a 2 mph increase in the set speed when it senses a new speed limit (example: speed limit set manually to 40, truck sees a 35 mph sign and as I pass the sign it jerks my head accelerating to 42 mph to maintain my set 7 mph over speed limit). I enable it sometimes so the ride is smoother when I am driving my family in it.