DB ST

4 minutes ago, akirby said:

 

They did add one acceleration up to 70+ but the average is still near 55 mph.  As you approach 60, 70, 80 mph the HP required goes up exponentially.

Basically what I said, just said differently. Lol. 

On 4/9/2019 at 4:34 PM, jamie1073 said:

 

Nice.  Mine says 16.5 now on the clock for total mpg.  Calculated is not quite as optimistic.  About 1.5 mpg lower than the computer.  I took another highway trip last week and the computer said 18.8 for that tank,. I reset trip one when I filled.  The actual calculation, math, said I got 17.4 on that same tank.  About 150 miles of that tank were 75mph cruise set.  This thing sucks at even being close to what the ratings are. 

EPA estimated highway mileage isn’t tested anywhere near 75mph. More like 55mph. Having a vehicle with the aerodynamics of a brick is not conducive to getting good gas mileage at high speeds. 

Thanks for the details. If I remember correctly, MT ran a 14.7 and C&D ran a 14.3. It’s nice to know what sport mode, traction control off, and 93 octane do. I wouldn’t be surprised if Ford programmed a torque reduction by means of reducing boost and/or timing to prevent hard launches being the reason your different launch techniques didn’t show better results. 

1 hour ago, JCrew7384 said:

Is the MPG savings worth the additional gas cost?

Going from 26mpg (87) to 28mpg (93) I calculated $0.098 per mile with 87 vs $0.112 per mile with 93. The power difference is not huge, but noticeable. 

On another note, I noticed that I started getting full boost at 850 miles on the odometer. Prior to that, it wouldn’t go above 5psi. 

The lifetime mpg of my Edge so far has been 24mpg when including the 50-something miles on it before I bought it and remote starting/warm up during cold weather. 

For my third fill up I decided to try 93 octane. The temps have been between 60F and 70F. This is the result after driving to and from work (34 total miles).  Driving to work this morning, an additional 17 miles, I’m at 28.2mpg. I’m amazed at what I am getting with warmer temps and 93. 

Apparently quoting is not working for me right now ...

Jamie, When you get an opportunity, see if you can find some long flat roads at 35, 45, and 55mph. Set the cruise control to those speeds and (with a warm engine) see what the instant fuel mileage reading says. Mine pegs 40mpg at 35 and 45. 55mph I am usually around 35mpg. 65 is usually right around 26-28mpg. After 65, this 4500lb brick’s gas mileage proceeds to fall off a cliff. If your readings aren’t somewhat close to mine, all I can think of is that the O2 sensors in your car are somehow not calibrated correctly, but I find that extremely unlikely. 

 I don’t know for sure, but I don’t believe the trip mpg readings takes remote start/warmup into account. So it may say you are getting better gas mileage when you let your car warm up than you are actually getting. It wouldn’t be putting the 5 minutes of burning gas at 0mpg into the equation. 

 As far as turbo engines and gas mileage go, the mpg benefit is only there when you are not in boost. Once you hit boost, you are guzzling gas just like a larger engine.

i think we can all agree that those temps are outliers when speaking generally. But yes, I do live in a climate that gets that cold on occasion. The coldest i’ve ever seen my garage was 0C, and that was once when it was with the temps in the -25 range (-15F). 

 Black is the fastest color, but when it is sunny out. The heat absorbed by black paint heats up a thin layer of the surrounding air making it ever-so-slightly less dense. 

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On 3/18/2019 at 4:37 PM, jamie1073 said:

 

Daily trip to work is to start car and let run for a minute or so to get the idle to step down a hair.  Then about 1/2 mile out to the main 2 lane highway that I pull onto and speed up to 65 mph if I am not behind someone, hold 55-65 for about 4 miles then turn left onto another road and cruise down it around 65mph for about 1to 1.5 miles then take a right and back up to 55-65 for a few miles and into a 30mph zone for about 1/2 mile and turn into work.  Car is putting heat out by the time I hit the first 2 lane road and fully warm a minute or 2 into that part of the trip.  This is at 7 am, at 10:30am I come home to let the puppy out and then back to work, then come home at 3:30pm.  Trip is about 10 minutes one way.  I figure with that I should get close to at least city mileage out of the deal.  I got that with the Focus ST driving it harder and my 2007 Fusion Sport AWD V-6 I had before that.  Sadly when I first got it and ran 87 and was driving it the same way I got 15-16 mpg.  Best I have got since I started keeping track was 15mpg for one tank and then down from there.  That was only 7 tanks ago so 1200 miles maybe, I have 2600 on it now and have been running 93 the last 4 tanks. 

 First thing i’d do is stop letting the car idle for so long. There is no benefit to letting the car sit and idle for more than 10-15 seconds. All you really need is for oil to get moving. 

 Try using cruise control whenever possible. 

 As as far as the Focus ST, that engine was pushing a more aerodynamic car with 1,300lbs, 2 cylinders and .7l less than the Edge. 

 Frequent short trips sound like the main killer though. I don’t believe EPA estimates take into account engine warm up. At 10 minutes long, it takes 1/2 your trip for the car to hit operating temps. 

On 3/16/2019 at 2:03 PM, jamie1073 said:

 

I have taken a highway cruise set at 75 for 140 miles an reset Trip 1 and got 24mpg according to that meter until I got back and started driving around normal.  For that tank I got 18.1mpg, the two before it were 15.2 and 14.0 then after it 13.9 and 13.8.  Those first two were on 87 octane gas and the rest 93.  I reset my main MPG when I got it and it stands at 16.3 right now which I find off since that one trip is all the driving on a highway for more than 5-10 minutes I have driven in the 2400 miles since I bought it and I have no idea of what the first 200 miles were driven like, Trip 2 has that number and it is at 16.4 right now.  So I am leery on trusting the computer compared to the math. Either way it is not even close to the rated 19 City and most of my driving is not even in a city type environment of stop and go traffic.  I am waiting until it warms up more but I do not see it getting that much better.  The reason I started this thread was to see what other are getting to compare so I can see if maybe there is some strange issue or if it is normal.  Seems so far not to be to normal.  If I wanted 14mpg I would have just bought an F-150.  I would have expected closer to the 19, like 17 or 18 because I drive like I feel it should be driven for a 'Sport' vehicle.  But still I babied it for one tank and drove it like I normally would for the last and got the same mileage.  I mentioned the .1 down because that is all it did worse driving it like I want instead of like an old lady.  Like I said I got closer to city mileage on a tuned Focus ST flooring it more on the same drive I take now.  So it is strange that I can not do better by not flooring it so much. 

How would you describe your average trip? For instance, my drive to work is 16.5 miles and about 22 minutes. The engine is usually up to temp in about 5 minutes.  The speed varies from 25 to 65mph, but mostly 45-55mph (good mpg speeds). 

10 hours ago, Rimcrim said:

 

I was not using cruise control for the first 1600 miles because it's in the break in period and you're supposed to vary the engine RPM constantly rather than sit at one RPM for extended periods at a time.

I also used Sport mode a fair bit during break in for this reason, as I could easily rev it  up to about 3500 RPM and back down easily.

 

I suspect my mileage will stay similar now though, since I can drive it hard in sport mode but also use cruise control on the highways ?

The notion of a break in period is mostly a remnant from the past. Engines are made to tighter tolerances, better bore surface finish, and better materials than in the past. The only engine i’ve ever “broke in” properly was when I got a forged short block for my Mustang years ago and that was only because it wasn’t a production engine. I’ve always driven my cars as I normally would with the only exception being not beating the hell out of it for a 1,000 miles. I’ve always gotten near the epa highway mileage and never once had an engine consume oil. 

 As an engineer, if I felt that the engine break in was so important, I wouldn’t make a small note buried in the middle of the owners manual about it that few people read. I’d be writing it into the ecu and putting notices on the gage cluster or something similar. 

Hello everyone. I just got my ST on 3/2. It’s got 401a, 21” rims, and cold weather package. I picked it up with 54 miles on it. 

I got 24.2mpg with the first tank of whatever octane gas the dealership filled it with. About 30% into the 2nd tank of gas (89 octane) I’m getting 26.7mpg. 

This is is my 5th EcoBoost engine.

2013 Fusion Titanium fwd 2.0

2016 Escape SE fwd 1.6

2017 Fusion Titanium fwd 2.0

2018 Escape Titanium 4wd 2.0

now the ST

For reference, I’d get 27-30mpg in the Fusions depending on weather, so I’m pretty happy with 26.7mpg in the ST with the recent warmer weather. From my experience, using cruise control greatly benefits gas mileage no matter how steady your foot is with EcoBoost engines. Much more so than any n/a engine I’ve had.