Ecoboost MPG - Road Tripping in a FWD

[Jman79]

I just drove 650 miles from Allentown, PA to Knoxville, TN.

Since I've been running 88oct %15 ethanol and was curious if other octanes would yield different results in a pure highway setting.

I was fill 1/2 tank and tried various octane...
88 oct 15% eth = 32.4mpg
93 Oct 10% eth = 31.4mpg
89 Oct 0% eth = 33.1mpg
87 Oct 10% eth = 32.8mpg

Cruising 70-75mph for all of the above.

I was satisfied that there was no appreciable difference and didn't continue this the full round trip.

I also didn't want to do full tanks for both cost and time. So this is based on my trip meter only, not hand calculating at the pump.

Take it for what it's worth, but I think you're driving style & conditions outweighs gas type to the point of it mattering when it comes to mpg.

As for longevity / maintenance, who knows. Thankfully I'll be putting only about 6k a year on. So I'll see others high mileage issues reported with possibly enough time to change my behavior if necessary. My previous auto experience tells me it's all splitting hairs.

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[The Real Maverick]

Very reasonable results.

As they all say, the higher octane really only becomes necessary at high engine loads / high horsepower output.

You cruise along on the highways with about 30 HP. You can climb hills with 60 HP.

It's really only ACCELERATING briskly does high horsepower (and high octane) come into play.

 

[The Real Maverick]

I'll tell you at 75 mph the hybrid is only 2-4 mpg higher than an EB.

 

[dalola]

Interesting anomaly that the 93/10 yielded the lowest ave. I think there was some other influencing factor during that period....bad gas (Most likely), change in weather/prevailing winds, etc...

In similar conditions, the 93/10 should be close to the 89/0.

 

[Jman79]

Interesting anomaly that the 93/10 yielded the lowest ave. I think there was some other influencing factor during that period....bad gas (Most likely), change in weather/prevailing winds, etc...

In similar conditions, the 93/10 should be close to the 89/0.

Yeah, you may likely be right. I wasn't stringent about noting hilly sections of the drive. At one stop I did have to pin the accelerator to merge back at 70 in tight traffic and crappy on ramp.

That was all part of it to me though. Solidifying that there are much better places to focus my conservation efforts than worrying about type of gas.

 

[exsubsailor]

I just got my first fillup, calculated mpg=23.49, lie-o-meter mpg=23.5, not bad. For info, I traded a Subaru XT with similar HP/torque specs for the Mav and it only got about 20 mpg average for the same driving routes.

 

[The Real Maverick]

I just got my first fillup, calculated mpg=23.49, lie-o-meter mpg=23.5, not bad. For info, I traded a Subaru XT with similar HP/torque specs for the Mav and it only got about 20 mpg average for the same driving routes.

Umm.... it's official name is:

"Guess-o-meter"

 

[exsubsailor]

Umm.... it's official name is:

"Guess-o-meter"

Got it. Lie-o-meter is what I learned back when I had an F150 and posted on the F150forum.

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