6mt Eco users..

[Armanduhx3]

Headed to Orlando tomorrow from Jacksonville..
I am one of the few manual owners who use Eco mode (other then heavy traffic on a bride). Well usually on The beltway in town I go 63mph in a 65. Which achieves a 38ish mpg with a/c on and 45ish with a/c on.

Well i95s is 70mph. What speed (perf over 70) will achieve The most mpg in eco with a/c off?

[lexicon]

The lowest - the faster you go, the more fuel you're going to use.

[justinf67]

+1... I usually do 65 or so

[MattB]

Originally Posted by lexicon

The lowest - the faster you go, the more fuel you're going to use.

This is definitely correct. I get my best mileage between 45 and 55 mph.

The closer you can go to that range the better your mileage will be.

[8FUN8]

same here, i do 105km/h (a bit over 65mph) with cruise control in ECON, average in 5.6L/100km and a single tank can reach up to 640km.

[sneak1413]

I have found i get best mileage in my 6mt in eco mode under 50-55 mph. Anything over 55-60 mph i use normal mode otherwise the car is always trying to charge the battery because the assist is always trying to assist. In normal my battery is not always drained, i can keep constant speed easier and i get better mileage. I usually get between 37-40 mpg doing between 75 and 80 with the ac off in normal mode.

[Ken]

My wife and I did a stretch of backroads at 50 mph in 6th gear and got an indicated 44 mpg over 22 miles, mostly in eco mode.

[YouboughtaCRV?]

Food for thought... drag force formula:

Fd=½pv²CdA

Important thing here is that v² term: it makes the force of drag exponential. That's why most truckers will only go 70, even in a 75 or 80 zone. Mythbusters and did a couple great pieces on this rolled into the AC vs windows open story, and semi-trailer tailgating story, and Top Gear touched on it as well...
I've got 46mpg doing 70 tucked behind a semi for ~90 miles or so but do this at your own risk... truckers hate it and you can get ticked for tailgating.

[Tbot]

No joke but I saw that 69 did like 40 ish when I was driving... I was suprised but I dont know what I was doing. Not a hypermiling driver xD

[zoltiz]

5MPG difference on a 300 mile trip nets you $3.50 in savings. Drive safe and enjoy yourself.

That said, I do manage over 40MPG going 70mph+ around Atlanta by paying attention to traffic, coasting a lot and being careful with the accelerator. Pretty much never use cruise control, either - constant speed is not very MPG-friendly.