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Old 04-21-2009, 10:49 AM   #1
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Talking Does Jeep break-in the engines at factory?

I am just curious as I have been reading a great deal of info on the process, procedure and thoughts concerning proper engine break-in routines. Many manufacturers are apparently performing more routine break-in procedures at the factory on their engines to provide diligent & long-term benefit to their life cycle.

Anyone know if Jeep does any type of break-in on their engines?

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Old 04-21-2009, 11:49 AM   #2
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I'm not sure if they do EVERY vehicle. Nissan does, Honda does, I'm pretty sure Subaru does. Not sure about American manufacturer's, however. Usually the get a few minutes on a test track or somesuch. They may do batch testing on engines, though.

For break-in, don't use cruise control or maintain a steady speed (vary by ~5 MPH) for the first few hundred miles. Give it the boot when in 5th or 6th to help seat the piston rings. Other than that, be gentle for a little while. Check your oil every 500 for the first 5k or so (first oil change). After a few thousand miles, it'll be broken in and giving you full power- Mark W.

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Old 04-21-2009, 12:22 PM   #3
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I've read Ford's break in procedure when I got my new Expedition and quite frankly, I think half the crap they publish is to cover their rearends in a lawsuit. IMO - none of the manufacturers "break in" the motor. They quality test them for an hour (maybe) and then out the door they go.

I use the old school approach when breaking in ANY new car or new motor.... First 100 miles or 1 hour, I don't break 2000 rpm's. Do a sanity check for noises and check the oil and temp gauges. Verify oil level and check for metal particles. After that, GAME ON! Range the engine as much as possible (idle to the redline). Don't baby it either, work it as much as possible. You need to set the rings and the only way to properly do that is under dynamic load conditions. Change the oil after 500 miles, then re-change next 2K miles.

It's too much liability for the manufacturers to suggested this driving behavior when you get your new car....too many people would be involved in accidents and speeding tickets. Ask any hot rod mechanic and they'll tell you the same.
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Old 04-21-2009, 04:03 PM   #4
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^ I do this for performance engines. Dinosaur oil for the first 500, then Mobil 1 for the rest of her life.
For the JK, I followed the OEM procedure more or less, but beat on it a fair bit Mark W.
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Old 04-21-2009, 04:13 PM   #5
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Thanks for the advice, Mark & MOz...... Changing my oil tonight at 800 miles.... 100-200 miles was proper "break-in" driving....then I added 500-600 miles on a Interstate trip, probably not the best but I don't think I broke anything... LOL.
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Old 04-21-2009, 04:14 PM   #6
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Originally Posted by thaduke2003 View Post
^ I do this for performance engines. Dinosaur oil for the first 500, then Mobil 1 for the rest of her life.
For the JK, I followed the OEM procedure more or less, but beat on it a fair bit Mark W.
Are you running synthetic in your JK or dino?
Was thinking about going SynPower or Pennzoil Platinum.
I ran Mobil 1 in all of my previous cars including Vette (SCCA racing),
Boxster S & 4Runner with great results....
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Old 04-21-2009, 05:16 PM   #7
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Quote:
Originally Posted by AndyLA View Post
Anyone know if Jeep does any type of break-in on their engines?
Well, mine is supposed so, i asked the dealer and he said it's done, the owner manual sais the same... Though mine is produced in Europe (Germany, more specific)

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