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Break in procedure

This is a discussion on Break in procedure within the Mustang GT350 General Discussions forums, part of the Mustang GT350 Forum category; these engines come broken in from the factory you can go new from the dealership straight to the race track if you want. drive it ...

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  1. #11
    Senior Member racer172's Avatar
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    these engines come broken in from the factory
    you can go new from the dealership straight to the race track if you want.
    drive it like you stole it.
    2017 GT350 - Shadow Black / White Stripes

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    Ok but what about the gears in the transmission and differential. I would never do that. All those gears need a little time to seat in smooth against each other. I have known of people with lock rear ends on performance cars complaining about rear end whine from doing just what you said. But by just taking it easy for 500 miles or so made a complete difference.

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    Senior Member racer172's Avatar
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    ^ yeah that's a good point Johnny
    2017 GT350 - Shadow Black / White Stripes

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    Quote Originally Posted by guruatbol View Post
    I'm still waiting for mine. I ordered it 8/24. they said in a couple weeks. we have an invoice from Ford ad a VIN.

    good luck and have fun!

    Mel
    Hey Mel, congrats on your new GT350, post pics in the new members section when it arrives! Speaking of which, are you tracking via the Ford COTUS tracking system or you can call Ford performance directly at 800.364.3788 and they can give you an update using your VIN...
    2017 GT350 / Lightning Blue / Electronics Pkg...

  6. #15
    Member fpGT350's Avatar
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    COPIED AND PASTED FROM GT 350 SUPPLEMENT TO OWNERS MANUAL:

    BREAKING-IN
    Your vehicle requires a break-in period.
    Drive your new vehicle at least 100 mi
    (160 km) before performing extended wide
    open throttle maneuvers and at least
    1,000 mi (1,600 km) before performance
    or competition conditions.
    Note: Vary your speed frequently in order
    to give the moving parts a chance to break
    in.

  7. #16
    Senior Member racer172's Avatar
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    Break-in procedure:

    2017 GT350 - Shadow Black / White Stripes

  8. #17
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    Thought I would share the old published break-in procedure for Dodge Viper engines. Keep in mind that the 8.0 liter Viper engine red lines at only 6,100 RPM. I am using this procedure on my GT350 with proportionately higher rpm shift points each 200 miles. I have about 650 miles on my car but I have yet to rev the motor over 4,000 rpm. Each 100 miles I will raise the maximum shift point by 500 rpm. After 1,000 miles and my first oil change will be the first time I consider any wide-open throttle maneuvers or taking the engine to red line.

    The following break-in procedure is suggested for any NEW Viper engine.

    During the first 1000 miles (1610 km):
    1. Avoid long periods of engine idling.
    2.Wait until the engine has reached operating temperature before driving
    enthusiastically.
    3.Check the engine oil level at each fuel
    fill since a new engine may consume some
    oil during the first few thousand miles (this is normal and not a sign of an engine
    problem).
    4.Keep vehicle speed below 70 mph (113 km/h).
    5.Do not make any full throttle starts or full throttle accelerations.
    6.Avoid driving at a constant engine rpm for long periods as follows:
    !First 200 mile interval (322 km), light throttle run-ups shifting at a maximum
    of 2500 rpm. In addition, It is suggested to change the engine oil within the
    first 200 miles of engine break-in.
    !Second 200 mile interval (322 km), light throttle run-ups shifting at a
    maximum of 3500 rpm.
    !Third 200 mile interval (322 km), light throttle run-ups shifting at a maximum
    of 4000 rpm.
    !Fourth 200 mile interval (322 km), light throttle run-ups shifting at a maximum
    of 4500 rpm.
    !Fifth 200 mile interval (322 km), light throttle run-ups shifting at a maximum
    of 5000 rpm.

  9. #18
    Member fpGT350's Avatar
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    July 2019 update. First oil change in early 2019 at 1,300 miles, no oil consumption shown on dipstick. Currently at 3600 miles, no oil consumption visible on dipstick but had about 2 ounces of oil in my air/oil separator. Absolutely no mechanical issues whatsoever. I babied the break-in as described above, hopefully that was the right decision. 2nd oil change will be at 4,000-4,300 miles. Always factory fill, factory filter, factory plug. I recently changed out the factory air filter with the recommended blue Airaid filter which fits my 2018 gt350 perfectly. The OEM filter looks to be hugely inferior.

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    From the dealer, I avoided the freeway and took the back roads as much as I could, so as to vary the speeds. After that, city and country roads till 1200 miles, never exceeding 4000 rpm. That was difficult. Changed the oil and then experienced how this engine comes alive above 4000 rpm. What a motor. Just passed 3100 miles with no oil consumption issues.🤞Be sure to sign up for track attack. You’ll learn more about your car than you can imagine. You’ll learn what the car’s and your own limits are in a controlled environment. An amazing experience!
    RJay likes this.
    Mark

    2018 Mag Met Grey Black Roof No Stripes Convenience Package

  11. #20
    JWS
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    I've taken it easy and I am at 580 miles. Never took it past 5k RPM and when I did it was after I hit around 300 miles or so and short spurt.

    I did install the OEM oil catcher for passenger and driver side. I was told that was mandatory and must be done.

    As for how much the car roars, I don't think I will ever get used to how awesome it sounds. I love the fact I can use normal mode and it is quiet to not disturb the neighbors. I hated it when people woke me up and so I try to be courteous.

    All I can say is this car is going to be something in 10 - 20 years.

    Nothing I have ever owned from American car has been this enjoying to drive.

    2019 GT 350 FTW!

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