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  #1  
Old 10-15-2009, 04:46 PM
KingRanch250 KingRanch250 is offline
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Fuel Mileage during breakin

I have @ 300 miles on a new 2010 F150 screw platinum, with the 5.? v8, 355 rear. My mileage has been terrible. I am getting 13.3 currently. Is the mileage supposed to be this bad during the break-in period ? I was getting better mileage on my 08 F250 cc 6.4 diesel, and that was bad. I hope it will get better. What type of mileage should I expect on the highway and city ??
Thanks ! Wade
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Old 10-15-2009, 05:30 PM
silver05fx4 silver05fx4 is offline
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for my first 1500 miles i only got 13 flat but now im geting 16 to 19 easy with out trying

some start off great and others don't
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Old 10-15-2009, 05:58 PM
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Well I have about 500 miles on my 2009 5.4 with 3.55 rear Scab as of today and have just drove on 2 lane mountain roads (up and down) plus small town traffic and my MPG meter is on 19.1! I havn't got it on the big road yet. So needless to say, I'm a happy camper!
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Old 10-15-2009, 06:34 PM
KingRanch250 KingRanch250 is offline
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Good deal. I feel better now. Thanks Guys !!
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Old 10-15-2009, 06:58 PM
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when I was breaking my truck in I was getting about 16 to the gallon. Now I am getting over 18 combined and over 25 on the highway with the cruise control on.
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Old 10-15-2009, 07:10 PM
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I have a Screw 4x4 Lariat. Gas mileage was poor at first... sub 14. It's only gotten better with time - now 16ish with 8,000 miles. Mine is very sensitive to city stop/go traffic vs. highway.
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Old 10-15-2009, 07:18 PM
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2010 break-in vs. 2001 broken-in

I just filled my 2010 XLT (4x4, 5.4L, 3.73, 8' bed, 8200# GVWR) at 1,229km (~ 764 miles).

The fuel usage for this fill-up (calculated from the pump receipt and trip odometer) was 13.95 L/100km, which converts to 16.8 miles/US gallon.

Most of this distance was commuting (75% highway, 25% suburban), with no passengers or cargo, stock tires, and a tonneau cover.

I am still in the break-in period so speed was variable, but I tried very hard to keep the RPMs under 2000.

The 2010 fuel usage so far compares very favorably to the 2001 XLT (4x2, 4.6L, 3.55, 6.5' bed, tonneau cover) I traded (around 230,000 km) which was typically 12-14 L/100km for the same circumstances.

The 2010 is newer but it is a larger, heavier truck with four wheel drive, a bigger engine and lower rear gearing.

A
t 100 km/h (60 mph) on a level highway the 2001 would turn ~2000 RPM. Under the same conditions the 2010 turns ~1750 RPM.

So far (and under these conditions) the six speed transmission seems to make up for the difference in weight, engine, and gearing. No doubt things would be different with a heavier foot, hilly terrain, cargo, trailer, etc.

Snapshot

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Old 10-15-2009, 09:21 PM
tvsjr tvsjr is offline
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Quote:
Originally Posted by fire240 View Post
when I was breaking my truck in I was getting about 16 to the gallon. Now I am getting over 18 combined and over 25 on the highway with the cruise control on.
25 on the highway? Sorry, I don't buy that at any speed with any V8 and any gearing, especially on a 4WD.
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Old 10-15-2009, 10:02 PM
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new to the forum and new to an 09 f150. thankfully, mine traveled 780 miles from where truck was located to dealer where purchased. so the lousy breakin mileage was pretty much at the expense of the dealer. here's the numbers believe it or not. 15.5 city, 20.1 interstate (72mph), 20.5-20.9 highway (61mph). of course, i'm keeping my foot out of it for the most part. sure beats the 11-14 that the 01 f250 crew got. haven't hauled with this truck yet, but i'm already convinced that this is the best built and engineered ford truck i've ever owned.

2009 f150 4x4 xlt supercab 3.55 limited slip, 18in wheels.
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Old 10-15-2009, 10:03 PM
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25 on the highway? Sorry, I don't buy that at any speed with any V8 and any gearing, especially on a 4WD.
I will take a pic of it next time I am on a long trip.
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Old 10-15-2009, 10:24 PM
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Quote:
Originally Posted by tvsjr View Post
25 on the highway? Sorry, I don't buy that at any speed with any V8 and any gearing, especially on a 4WD.
Better buy it because that is the norm for these trucks, got 24.7 right out of the box with mine first trip. 3:31 gear ratio. Have made many trips at 24. towing 10K 5th wheel in tow haul mode 13. 330 hp v-8 6 speed trans.
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Old 10-15-2009, 10:29 PM
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I was surprised at the numbers myself. I did lose some mpgs when I crossed black mountain in western NC. but picked it back up going down the other side.
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Old 10-15-2009, 10:37 PM
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black mountain will get you every time, pound mountain in pound va. is even worse..
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Old 10-15-2009, 10:40 PM
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That it will.
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Old 10-15-2009, 10:50 PM
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2010 supercab, 5.4 4x4 lariat with 3.55ls.

With 500 miles I have been seeing 17 on the highway and 15 overall. Those numbers are based on the computer readouts as I have not had to fill the tank yet.
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Old 10-15-2009, 10:50 PM
 
 
 
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