MPG for 3.5 EcoBoost with 3.31 rear end - Page 2 - Ford Transit USA Forum
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post #11 of 611 (permalink) Old 01-08-2015, 09:08:PM Thread Starter
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Originally Posted by Longboard View Post
In my Sprinter when the pump shut off that was pretty much it. No matter how long I waited for the diesel foam to settle, I really could get no more fuel in once the auto shut-off of the nozzle occurred. In my Hondas I can get three more gallons of gas in if I stand there patiently, but of course different nozzles react differently.
Are you guys finding that auto shut-off is pretty much the limit or can you top off well beyond that?
Just curious because I truly believe one day my Transit will arrive and I want to know how best to submit some MPG info to the forum.
As long as you repeat a uniform practice, the results should be helpful. Also, a running total does not really depend on the accuracy of each tank being "full."

Gas does not foam like diesel so the top-off issue you raise is less important with gas.

2015 XLT 150 Wagon, 3.5EB/3.31LS, 130" WB, low roof, 8-passenger, full trailer tow incl. brake controller, ordered 12/14, delivered 4/20.

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post #12 of 611 (permalink) Old 01-08-2015, 09:56:PM
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As long as you repeat a uniform practice, the results should be helpful. Also, a running total does not really depend on the accuracy of each tank being "full."

Gas does not foam like diesel so the top-off issue you raise is less important with gas.
No, it's MORE important with gas! With diesel it shuts off and that's that. With gas if you ARE calculating by the tank it makes a big difference how much time one is willing to nurse the nozzle to get uniform top off results.
The reason the tankful is important to me vs the running total is with my high roof 3.5 I will be very interested in learning the difference between 65/70/75/80/and yes even 85mph mpg's. Best calculated by the tankful on a long trip. Of course I will take into account wind and terrain, but I'd like to know that my fuel added each fill-up is uniform.
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post #13 of 611 (permalink) Old 01-08-2015, 10:09:PM Thread Starter
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Sorry for the ambiguities. Starting over about gas only . . .

If you are the one pumping the gas, since each pump has its own shut-off system, and these could vary, you will have to nurse each fill-up, pulling the nozzle out of the fill tube as it gets fuller, until you hear the gas getting close to the top, or it overflows, or the pump won't pump any more.

Or you could just let each pump shut off automatically once, and don't top off.

The main point IMO is that there are so many variables in the driving for each tank of gas, that obsessing over whether you have gotten each tank to exactly the same state of "fullness" is a hopeless task, or at least one without much reward. Ditto for speed, grade, winds, humidity, driver style, etc. for each tank full. Even on a dynamometer, it would be difficult to do an accurate multi-variable analysis of things . . .

To each his own, but the running total is more helpful for my use, as over the long run, there is only the long run, Yogi!

PS here I am running afoul of my own preference for no OT posting in this thread about actual MPG results for the owners of the 3.5/3.31 combo. One of these threads would be better IMO:

http://www.fordtransitusaforum.com/f...-mileage-mpgs/

2015 XLT 150 Wagon, 3.5EB/3.31LS, 130" WB, low roof, 8-passenger, full trailer tow incl. brake controller, ordered 12/14, delivered 4/20.

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post #14 of 611 (permalink) Old 01-09-2015, 03:57:AM Thread Starter
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3.5 Eco, 3.31 limited slip, med height, medium length xtl

By tank; Actual measurement. The computer is regularly off by 1 to 2 MPG.
. . .
Another question came to mind Airedrifter. Are you the sole driver? Other threads have discussed how the transmission "learns" the driver's throttle and braking patterns, and patterns its shifting up and down to maximize efficiency and comfort. If you have multiple drivers, this could impact MPG in my opinion.

Thanks again for keeping up with your mileage like this.

2015 XLT 150 Wagon, 3.5EB/3.31LS, 130" WB, low roof, 8-passenger, full trailer tow incl. brake controller, ordered 12/14, delivered 4/20.
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post #15 of 611 (permalink) Old 01-09-2015, 09:34:AM
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Well, it's a somewhat complicated picture.

We were just on a 3,000 mile Holiday trip where I dove to NC, then my wife drove to Iowa, then I drove from Iowa back to VA. I would think that at lest 75% of the driving is me.

The milage above was mixed driving before the trip, a lot of highway miles, mixed driving at our destinations, and then a hard highway drive back with lots of rain and then more rain.

BTW, the computer is always higher than the hand calculated. When I fill up, generally I'll top off the tank one time after the automatic top. I've never seen it make more than what? .2 of a gallon difference? Over time, for my purposes, it de minimis.

Also, for what it's worth, my wife drives faster than I do. It's not unusual to look over and see her pushing 80. I'm generally 2 to 5 miles over the speed limit. The one 20 mpg was me being selective in my refilling. I was in Iowa and was on a short mission where I could only drive 55 and had virtually no stops. I took an early refill there just to document the high mpg. That comment should also reinforce my next comment, MPG suffers above 55 MPH! At 80, we were getting about 13.5 or so.

I've recorded every gas purchase I made and my wife got some of hers but didn't note the mileage, so it's not a complete record.

Currently, we're sitting at 6500 miles give or take. I did an oil change at 1000 miles (old school habit) and will get the next one at 8500.

The "wagon" has been pretty flawless. We didn't have any snow or ice in Iowa but we had really cold temps. A couple of mornings it was below 0. Always started, though one morning, even with dual batteries, it had a couple of rpms that were sluggish.

One other odd bit, as this has all the privacy glass and I did haul a large group one time in the really cold weather, I had to remember even when we were at full heat to turn on the AC to keep all those windows defogged. It's a quirky vehicle that rocks.

2015 Transit Wagon 350 XLT, 3.5 Ecoboost, 3.31 limited slip, Medium height, Medium length, Tow package, dual batteries, 110 vlt, SYNC with CD, ...
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post #16 of 611 (permalink) Old 01-09-2015, 10:15:AM Thread Starter
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. . . It's a quirky vehicle that rocks.
. . .


Thanks for an excellent comprehensive overview. Very helpful, and consistent with my previous Econoline experiences, and with my expectations for the new Wagon on order. With the 130" WB and low roof, I am hoping to average somewhat higher.

We shall see . . .

Thanks again.

2015 XLT 150 Wagon, 3.5EB/3.31LS, 130" WB, low roof, 8-passenger, full trailer tow incl. brake controller, ordered 12/14, delivered 4/20.
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post #17 of 611 (permalink) Old 01-09-2015, 11:01:AM
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When I fill up, generally I'll top off the tank one time after the automatic top. I've never seen it make more than what? .2 of a gallon difference? Over time, for my purposes, it de minimis.

So when the pump shuts off all you can get in is .2 gallon more?
That's good to know and very convenient. My Hondas only have 13.2 gallon tanks but the pumps all shut off over three gallons shy of full.
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post #18 of 611 (permalink) Old 01-09-2015, 05:10:PM
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So when the pump shuts off all you can get in is .2 gallon more?
That's good to know and very convenient. My Hondas only have 13.2 gallon tanks but the pumps all shut off over three gallons shy of full.
I didn't mean it that way. I'm not sure how much goes in between the auto shut off and my top off. I don't think that it's more that a gallon or so, but I haven't paid particular attention to that.

The .2 gallons I was referring to would be what I MIGHT get on a second topper with a high chance of overflowing. I don't think it's that much ... the point being, I do one top off.

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post #19 of 611 (permalink) Old 01-11-2015, 02:29:PM
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I did some testing today, using only the info display for mpg since I have so few miles on the van so far. This was more for a comparison of towing and none towing to give me an idea what I might expect on a trip next week to florida.

Temps where about 40 with calm wind. Fuel is what dealer put in at the local Kroger supermarket, which is not tier1.

Each leg was exactly the same 30 miles on 4 lane road, avg speed was 55-57 except for a long down and up thru a river valley that I gained up to about 70 at the bottom. So was a fair trip to compare what difference I may get, although at highway speeds of 65 it will be interesting to see how it will hurt it.

I had the tow haul on at first but it was holding at around 2000 rpm and was easy to drop gear and go up to about 2500 rpm. My trailer is only around 2500lb and aerodynamic so I turned off tow haul and it settled down to between 15-1600 rpm and did not feel the least bit like it was bogging down. Might be worth using it in town but with my set up I don't think it will be needed except for maybe very long grades.

Built in brake controller worked well. Easy to set up the gain, which I put a little below half. When I manually hit the brake lever while coasting, I can just feel it grab.

Overall impression, GREAT!! Towed it absolutely fantastic! Very easy on the van, felt better than my F250 pwoerstroke. I will have about 1000lbs of gear in the van but I don't think that will affect it too much.

Here are some pics of my mpg at the end of each run. If this is the overall difference I get towing I will be happy as can be. And if the mpg gauge is even close to accurate I will be happy too.

Oh yea, one of my neighbors passed me on the road and said I need a bigger trailer. He thought an airstream would look good behind it
Attached Images
File Type: jpg no tow 20mpg.jpg (28.0 KB, 140 views)
File Type: jpg tow-15mpg.jpg (33.2 KB, 125 views)
File Type: jpg ct1.jpg (56.3 KB, 127 views)
File Type: jpg ct3.jpg (73.8 KB, 94 views)
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Last edited by star gazer; 01-11-2015 at 02:33:PM.
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post #20 of 611 (permalink) Old 01-11-2015, 03:00:PM
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Fuel is what dealer put in at the local Kroger supermarket, which is not tier1.
I'm still not convinced that Top Tier means anything, but if it is a real difference it is supposed to be in keeping the injectors and other components clean via the additives, right? Do the Top Tier advocates claim an MPG increase?
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