Cold weather Ecoboost
11-02-2011, 08:37 PM
#1
Cold weather Ecoboost
What have you guys been seeing in mileage with temps down into the high 20s/low 30's? Seems like this engine takes a long time to warm up, combined with winter blend fuel = crappy mileage. I'm around 16.5 now, down from about 18.5.
11-02-2011, 08:47 PM
#2
FX4 SCrew TT'd V6
Winter fuel sucks, and normally, colder temps means more idle time. 10% is typically what I see with colder weather, in reduction in my mpg, your results may vary.
11-02-2011, 09:32 PM
#3
Member
Yup, I too have seen a fuel efficiency decrease. Before fall I was around 16 - 16.5 MPG's around town and as soon as the pumps switched to winter blend I lost 1 MPG, and about another 0.5 MPG as the temps dip. I keep very detailed fuel consumption data with the gas cubby app on my iphone which graphs efficiency and could see which tank was the first with winter blend fuel. Oh well, still much better than my 2008 F150 4.6 SCREW that got around 11- 12 MPGs during winter.
11-02-2011, 09:48 PM
#5
Senior Member
Luckily, we're still in the 70's down here. However, winter fuel does have less btu content (as opposed to different octanes, which have the same). Also, manifold vacuum runs deeper in the winter to achieve the same density at colder temps, which increases pumping losses.
11-02-2011, 11:38 PM
#6
Senior Member
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11-03-2011, 07:19 AM
#8
FX4 SCrew TT'd V6
11-03-2011, 08:05 AM
#9
Originally Posted by mrpositraction
I just moved here. I lived in MO for that past 8 years. Grew up in MI, but that doesn't have anything to do with the ecoboost gas mileage.
11-03-2011, 10:30 AM
#10
Senior Member/Vietnam Vet
Higher octane does not yield more power, but rather slows the burn rate to prevent detonation. The power comes from the timing advances that the lack of detonation allows. It is debatable whether high octane is worth the extra cost of it if you don't need it. Ford suggests it for towing so the engine will have a little more power without overheating the engine.