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Discuss Engine Break-In at the Focus ST Performance within the Ford ST Nation; Ah, the infamous discussion about ...
  1. #1
    ST Nation Command Sergeant Major faST's Avatar
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    Engine Break-In

    Ah, the infamous discussion about the proper way to break-in an engine. As many of you know, there exists several schools of thought (and strong opinions) despite advances in manufacturing precision, synthetic oils, and factory break-in.

    1. Drive it like you stole it - The proper way to seat those piston rings is to do it immediately! Argument, most manufacturers have already brought the engine up to redline before it goes into the car.

    2. Don't do anything different - Drive it as you normally would. Argument, how do you define normal?

    3. Air on the side of caution & follow the often vague owner's manual
    -

    The European manual says, non-engine specific:

    "Avoid driving too fast during the first 1500 kilometres (1000 miles). Vary your speed frequently and change up
    through the gears early. Do not labour the engine."

    I tend to use a modified version of how Cobb does a fully-built engine break-in: Technical Articles

    0-100 miles, run engine very lightly, no more that 1-2 psi boost, no more than 28% TPS and 3500 RPM, change engine oil and filter. Vary the engine RPM and decelerate the engine under vacuum as frequently as you accelerate the engine, you want your engine to break-in evenly.

    100-500 miles, run engine very lightly, no more that 3-5 psi boost, no more than 40% TPS and 4500 RPM. Vary the engine RPM and decelerate the engine under vacuum as frequently as you accelerate the engine; down shift the vehicle to come to a stop rather than using just the brakes.

    500-1000 miles, run engine more aggressively, no more that 6-8 psi boost, no more than 50% TPS and 5000 RPM. Change engine oil and filter.

    In summary, break-in the engine progressively and change the oil & filter at the first 1000 miles.

    What does everyone else do?
    '13 ST2
    Cobb AP v104. Tinted glass & lights. Green filter. e-RMM. Steeda SSB
    Soon: Catback. AP e-tune

    '12 Kawi Ninja 650 Yoshimura'd-Out

  2. #2
    Sergeant of ST Nation MacAttack's Avatar
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    I'm planning on taking the first 1000 miles easy, doing an oil change, and then driving it normally (aka like I stole it).


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    -Greg

  3. #3
    ST Nation Sergeant Major
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    I usually go with the car manual. What sucks is I hate car manuals. As I get to 999 miles 9/10. I speed up and when it hit's 1000mi I WOT and start breaking in the car with some spirited maneuvers on curvy roads.


    Quote Originally Posted by MacAttack View Post
    (aka like I stole it). :LOL:



    Sent from my iPhone using Tapatalk

  4. #4
    ST Nation Moderators Team petraman's Avatar
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    I'll drive like a grandma the first 1000 miles. Not a lot of highway driving, smooth starts, smooth braking and basically just taking it easy on it out of principle. When I get an ST it'll be more of a pampered brat than Paris Hilton.
    - Peter
    Save The Manuals!

  5. #5
    ST Nation Command Sergeant Major elnorte's Avatar
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    I can tell all of you that your car has already been to 70mph on the dyno within its first 2 miles. That's not granny shifting either.lol

  6. #6
    ST Nation Sergeant 1st Class
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    Every motor I have built myself I fire up and run it hard. My personal belief is drive it how you plan on treating the entire time you own it. All of my friends do break in periods then beat on them and have more troubles then I would ever want. To each is there own I guess.

  7. #7
    ST Nation Master Sergeant
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    I was planning to stop by the drag strip in my way home. I figure that will break it in.
    Chad, petraman, PDX:ST and 2 others like this.

  8. #8
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    I drive spiritedly for the first 1000 miles Change the oil, using dyno oil. Drive it another 3000 miles just as before on the dino oil and then change over to synthetic oil from there on out.
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  9. #9
    ST Nation Moderators Team petraman's Avatar
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    I think we can all agree that, even though the manual won't mention this, it's probably best to change your oil right around the 1000 mile mark
    - Peter
    Save The Manuals!

  10. #10
    Director of Web Relations
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    Ken Bury and Will I know I am like this.
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