I have a 2010 F150 with 5.4 engine. Changed exhaust systen and k&N air filter. My gas mileage is right around 14 mpg for town and trips. Any idea how to get trip miles up around the 18 mpg you guys are talking about. Tnansmission also keeps shifing up and down. Have LT305-55R20 tires on

10

Asked by Feb 21, 2017 at 04:01 PM about the 2010 Ford F-150 Platinum SuperCrew LB

Question type: Maintenance & Repair

1 Answer

21,115

If you lost the exhaust back pressure you may need to add a mufflar designed to increase back pressure a little bit like a mufflar designed for towing. All auto's but even more so for these newer cars/truck with the computer modules are designed to run better with this back pressure. No need to increase the size of the exhaust size if the engine is not been Moded out. They already come with enough size pipe, Cars back 30+ plus years ago need size upgrades and the bends were less than sufficient. The last 30 years though with the computer systems they are robbing the average hot rodder of fun and economy by making them only to be better fuel consumption and reliable with the systems they put on it and worse without them. At least this is the way I see it, since the late 1980's. I use to put custom exhaust on my cars and have fun when I wanted too, and get good gas mileage when I wanted too by lifting my foot off the gas some, Now days the only way to that is to change your parts back to stock.

Your Answer

Ford F-150 Experts

  • #1
    OJ
    Reputation
    9,450
  • #2
    dandyoun
    Reputation
    4,650
  • #3
    tennisshoes
    Reputation
    3,270
View All

Related Models For Sale

Used Chevrolet Silverado 1500
198 Great Deals out of 10,040 listings starting at $1,779
Used GMC Sierra 1500
245 Great Deals out of 10,352 listings starting at $1,775
Used Ford F-250 Super Duty
27 Great Deals out of 700 listings starting at $2,475
Used Toyota Tundra
39 Great Deals out of 1,269 listings starting at $5,925
Used Dodge Ram 1500
50 Great Deals out of 492 listings starting at $2,948
Used Toyota Tacoma
45 Great Deals out of 1,121 listings starting at $7,950
Used Ram 1500
443 Great Deals out of 26,346 listings starting at $8,490
Used Ford F-350 Super Duty
33 Great Deals out of 1,052 listings starting at $5,500
Used Ford Mustang
13 Great Deals out of 1,078 listings starting at $3,995
Used Chevrolet Silverado 2500HD
22 Great Deals out of 1,268 listings starting at $4,995
Used Nissan Titan
31 Great Deals out of 484 listings starting at $6,950
Used Chevrolet Tahoe
739 listings starting at $3,995
Used Chevrolet Colorado
25 Great Deals out of 2,083 listings starting at $1,999
Used Ford Explorer
15 Great Deals out of 1,563 listings starting at $3,395

Used Cars For Sale

2018 Ford F-150 For Sale
3,784 listings starting at $30,799
2017 Ford F-150 For Sale
59 Great Deals out of 1,915 listings starting at $28,887
2016 Ford F-150 For Sale
98 Great Deals out of 915 listings starting at $22,900
2015 Ford F-150 For Sale
151 Great Deals out of 821 listings starting at $21,992
2014 Ford F-150 For Sale
123 Great Deals out of 576 listings starting at $12,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.