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11-09-2018, 10:07 AM
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#1
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Registered Member
Join Date: Jul 2014
Posts: 2
Country: United States
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2019 GT and Break-In MPG
I've been on Fuelly for a while with a few different older vehicles, but this is my first new one. I'm surprised at how efficient V8 engines have become. My 88 5.0 was 20 mpg average if I drove like a granny, and I can get almost 24 with double the hp on my 19.
I use regular unleaded and drive it like a maniac half the time.
Since this is my first new car, I wonder about something a mechanic friend told me. After your car breaks in (usually about 10k miles) your mpg will drop noticeably. Is this true? The mpg I'm getting now is great and I would hate for it to start dropping.
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11-09-2018, 12:43 PM
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#2
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Registered Member
Join Date: Nov 2007
Posts: 1,853
Country: United States
Location: north east PA
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Fuel economy gets better once the tires have a few thousand miles of wear on them.
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11-11-2018, 01:58 AM
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#3
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Registered Member
Join Date: Aug 2009
Posts: 3,386
Country: United Kingdom
Location: Mid Wales
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I always thought the opposite, think of anything new, they all require more energy to move them due to the resistance of new parts. A brand new book is harder to open than a 1 year old one, and freshly fitted door handle needs more energy to push it down, but when things are "worn in" they require less energy. I assume its the same with cars with many thousands of moving parts.
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11-16-2018, 06:21 AM
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#4
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Registered Member
Join Date: Jul 2014
Posts: 2
Country: United States
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Makes sense! My gas mileage improved slightly after my second fillup, and seems to be holding steady now as I edge toward 3k miles.
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11-20-2018, 11:23 AM
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#5
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Registered Member
Join Date: Nov 2013
Location: Houston, Tx
Posts: 111
Country: United States
Location: Houston, Tx
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Green Lightning indeed ! (drool goes here)
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11-21-2018, 12:08 AM
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#6
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Registered Member
Join Date: Aug 2009
Posts: 3,386
Country: United Kingdom
Location: Mid Wales
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Ford's modern engines are surprisingly effecient if you want them to be. In the 2016 MPG marathon, the Mustang V8 won best percentage difference getting 36 UK mpg overall. Last year, Fords fiesta came first in both petrol and diesel getting an incredible 97 mpg and 122 mpg respectively!
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12-11-2018, 03:21 AM
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#7
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Registered Member
Join Date: Dec 2018
Posts: 3
Country: India
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if you want them to be. In the 2016 MPG marathon, the Mustang V8 won best percentage
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