Loss of MPG after installing aftermarket Catback - Page 2
Close
Login to Your Account
Ford Focus RS Forum

Loss of MPG after installing aftermarket Catback

This is a discussion on Loss of MPG after installing aftermarket Catback within the Focus RS Discussions forums, part of the Focus RS Forums category; Originally Posted by thirdgen89gta Winter fuel does reduce fuel economy. Look at my chart for the past year. You can see the general trend from ...

Page 2 of 3 FirstFirst 1 2 3 LastLast
Results 11 to 20 of 24
Like Tree13Likes

Thread: Loss of MPG after installing aftermarket Catback

  1. #11
    Supporting Member Hankbobo's Avatar
    Supporting Member

    Join Date
    Jun 2017
    Location
    Columbia, MD
    Posts
    1,243
    Member #
    31218
    Liked
    577 times
    Mentioned
    20 Post(s)
    Quote Originally Posted by thirdgen89gta View Post
    Winter fuel does reduce fuel economy.

    Look at my chart for the past year. You can see the general trend from October through April is slightly worse than the warmer months.

    http://www.fuelly.com/car/ford/focus...5650/fuelchart
    Love seeing data. Thanks Bill. May be whats going on?

  2. #12
    RS Veteran thirdgen89gta's Avatar
    Join Date
    Sep 2015
    Location
    Buffalo Grove
    Posts
    2,506
    Member #
    1274
    Liked
    1817 times
    Mentioned
    43 Post(s)
    Quote Originally Posted by Hankbobo View Post
    Love seeing data. Thanks Bill. May be whats going on?
    My driving is obviously not the same every day of the week, thats why there are spikes and dips, long trips, short trips, track days and road trips....

    That is every bit of fuel the car has ever consumed since its been in my possession. 1,051.98 gallons of fuel.

    You can definitely see the track days. the most recent 26mpg spike was a 300 mile+ trip home with the cruise set to 80-85mph the entire time. 26mpg isn't bad for that.

    I should also mention, my car currently has the leaky head gasket, and it doesn't seem to be affecting my fuel economy much. Car drinks about 1 gallon coolant per month.
    -Bill

    1989 Pontiac TransAm GTA | Arctic White | Born 11/17/1988 | Supercalafragalisticheadscamalidocious
    2017 Ford Focus RS | Frozen White | RS2 |RS# 4266 | Born 6/4/2017 | Purchased 4/21/2018
    2016 Ford Focus RS | Stealth Grey | RS2 |RS# 4993 | Ordered 10/12/2015 | Born 5/11/2016 | Received 7/9/2016 | Death 4/16/2018 Hidden Content
    Hidden Content | Hidden Content

  3. #13
    RS Specialist
    Join Date
    Feb 2017
    Location
    LA
    Posts
    1,202
    Member #
    22113
    Liked
    452 times
    Mentioned
    18 Post(s)
    Quote Originally Posted by Raptor911 View Post
    You must drive like a mad man. I average 24.5.
    I've never gotten over 20 unless it's 100% highway driving, then it's around 26-27. Normal driving is around 18-19mpg, and I'm at exactly 20mpg average over almost 9k miles.

    I've also logged every fillup since purchase, but don't have it in a nice graph like that.
    DAHTcom likes this.
    2017 NB RS1
    Engine: Radium CC's & Plate, Boomba BPV, Mountune SSC & Filter, SteamSpeed IC & Piping
    Suspension: Mountune springs, Massive Rear Camber/Toe Arms, Whiteline Rear SB & EL, Powerflex Front LCA Bushings, FA 500's (Raised 40mm by FA)
    Brakes: Rotora 2pc Rotors (15lbs), Mountune Street Pads, RBF 600
    Shoes: Volk CE28n 18x9 +38 (16lbs), 4S 265x35r18's
    Body: Xpel front Wrap, Satin black Roof / Mirrors, Boomba SS Lever, SS Arm, solid bushings
    T.B.I.: Shorai Battery, Turbo Blanket

  4. Remove Advertisements
    FocusRS.org
    Advertisements
     

  5. #14
    RS Pro onestep's Avatar
    Join Date
    Nov 2015
    Location
    Plymouth, Michigan
    Posts
    1,641
    Member #
    1827
    Liked
    768 times
    Mentioned
    33 Post(s)
    Has the air temp dropped lately? Tire pressures?
    Take everything I post with an MDOT truckload of salt.
    “Civilized men are more discourteous than savages because they know they can be impolite without having their skulls split, as a general thing.” R.E. Howard
    Hidden Content

  6. #15
    Supporting Member Hankbobo's Avatar
    Supporting Member

    Join Date
    Jun 2017
    Location
    Columbia, MD
    Posts
    1,243
    Member #
    31218
    Liked
    577 times
    Mentioned
    20 Post(s)
    Quote Originally Posted by onestep View Post
    Has the air temp dropped lately? Tire pressures?
    Id have to check tires. No TPMS light, and they’re nitrogenated so less susceptible to pressure drops. Again, the tips are telling me the mixture is rich. Will know more after Wednesday

  7. #16
    Supporting Member Hankbobo's Avatar
    Supporting Member

    Join Date
    Jun 2017
    Location
    Columbia, MD
    Posts
    1,243
    Member #
    31218
    Liked
    577 times
    Mentioned
    20 Post(s)
    Quote Originally Posted by thirdgen89gta View Post
    My driving is obviously not the same every day of the week, thats why there are spikes and dips, long trips, short trips, track days and road trips....

    That is every bit of fuel the car has ever consumed since its been in my possession. 1,051.98 gallons of fuel.

    You can definitely see the track days. the most recent 26mpg spike was a 300 mile+ trip home with the cruise set to 80-85mph the entire time. 26mpg isn't bad for that.

    I should also mention, my car currently has the leaky head gasket, and it doesn't seem to be affecting my fuel economy much. Car drinks about 1 gallon coolant per month.
    So you’re just waiting for it to give out on ya?

  8. #17
    RS Specialist cntrdctn86's Avatar
    Join Date
    Oct 2015
    Location
    San Jose, CA
    Posts
    1,095
    Member #
    1514
    Liked
    771 times
    Mentioned
    38 Post(s)
    My normal pre-catback was 20ish average. My last 3 tanks have been 15.2, 23.5, and 15.4. I drove on the highway a bit with the gf in the car for tank 2, so no loudpedalitis. The other 2 have definitely been loudpedalitis.
    onestep likes this.
    2016 Focus RS - Stealth Gray, RS2, Moonroof - Ordered 10/12/15, Selected 11/12/15, Built 4/15/16 BMF, Shipped 6/14/16, Delivered 7/22/16
    1994 Mazda Miata - Laguna Blue, Turbocharged

  9. #18
    RS Veteran thirdgen89gta's Avatar
    Join Date
    Sep 2015
    Location
    Buffalo Grove
    Posts
    2,506
    Member #
    1274
    Liked
    1817 times
    Mentioned
    43 Post(s)
    Quote Originally Posted by Hankbobo View Post
    So you’re just waiting for it to give out on ya?
    2 trips, Ford tech says "no problems, here's your car back"

    Welp, they can have the car when it warps a head then. I've done my part, I notified and dropped the car off, only to be told "no problems".
    Hankbobo likes this.
    -Bill

    1989 Pontiac TransAm GTA | Arctic White | Born 11/17/1988 | Supercalafragalisticheadscamalidocious
    2017 Ford Focus RS | Frozen White | RS2 |RS# 4266 | Born 6/4/2017 | Purchased 4/21/2018
    2016 Ford Focus RS | Stealth Grey | RS2 |RS# 4993 | Ordered 10/12/2015 | Born 5/11/2016 | Received 7/9/2016 | Death 4/16/2018 Hidden Content
    Hidden Content | Hidden Content

  10. #19
    Supporting Member Hankbobo's Avatar
    Supporting Member

    Join Date
    Jun 2017
    Location
    Columbia, MD
    Posts
    1,243
    Member #
    31218
    Liked
    577 times
    Mentioned
    20 Post(s)
    Quote Originally Posted by thirdgen89gta View Post
    2 trips, Ford tech says "no problems, here's your car back"

    Welp, they can have the car when it warps a head then. I've done my part, I notified and dropped the car off, only to be told "no problems".
    Lame. Nothing short of what I’d expect from them though. “No code no problem.” Ford could save some money if they were more proacive vs reactive in their maintainence logistics.

  11. #20
    RS Master
    Join Date
    Feb 2017
    Location
    Washington
    Posts
    317
    Member #
    21673
    Liked
    159 times
    Mentioned
    5 Post(s)
    FWIW I have an MBRP cat-back as well and haven't noticed any drop in mileage. A week ago I took a trip 2 hours away and got 27mpg round trip. It's been installed for about 6 months.
    Last edited by hydrostream; 10-06-2017 at 02:02 PM.

Page 2 of 3 FirstFirst 1 2 3 LastLast

Home | Forum | Active Topics | What's New

Sponsors

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. How to: Installing EC Mirror with Homelink
    By TheWeasel in forum Focus RS Accessories
    Replies: 19
    Last Post: 04-29-2019, 05:10 PM
  2. So I thought I could do without installing the SSC....
    By Regulated in forum Focus RS Performance
    Replies: 19
    Last Post: 08-04-2017, 11:19 PM
  3. Installing Recaro Pole Seats in the RS
    By Leo in forum Focus RS Appearance
    Replies: 8
    Last Post: 06-19-2017, 06:45 AM
  4. Another loss for motorsport
    By euRoSport in forum Off-Topic Section
    Replies: 15
    Last Post: 05-23-2017, 11:18 AM
  5. Installing new spring? A couple things to know.
    By seniorgeek in forum Focus RS Suspension
    Replies: 5
    Last Post: 04-20-2017, 06:30 PM