Engine Break In
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This is a discussion on Engine Break In within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; So just got the call from the dealership my car made the May boat so it should be here in ...

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    Registered User cmayba's Avatar
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    Engine Break In

    So just got the call from the dealership my car made the May boat so it should be here in a couple weeks!! They weren't lying when the said 8-12 weeks it will be here probably either week 12 or week 13. So as the title implies I know to follow the owners manual don't rev. above 4k, vary engine speed, gentle on everything for the first 1k ect. I understand that. What do you think about "setting" the piston rings to the cylinder wall? I have read that in the first 20 miles the car needs WOT in a high gear at low speeds to build pressure to "set"the piston rings to the cylinder walls. I have read that this will substantially reduce oil blow by in the future and lead to greater longevity of the motor. Any thoughts or opinions?

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    OMG WTF MainFrame's Avatar
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    The rings should be seated by the time you pick it up. I wouldn't worry about it. A little boost (~5psi-10psi) will be fine, and engine breaking is good to clean the cylinder walls. Other than that, stick with everything you already mentioned and you'll be just fine.

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    He simply abides. SD_GR's Avatar
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    Quote Originally Posted by cmayba View Post
    What do you think about "setting" the piston rings to the cylinder wall? I have read that in the first 20 miles the car needs WOT in a high gear at low speeds to build pressure to "set"the piston rings to the cylinder walls. I have read that this will substantially reduce oil blow by in the future and lead to greater longevity of the motor. Any thoughts or opinions?
    Plenty of thoughts and opinions. They are generally worthless though in my view because the people that have the most experience with designing, assembling, and supporting Subaru motors are... Subaru. Once somebody offers a 60K warranty with their break-in advice (extendable to 100K as a service contract in essence) I'll start listening.

    If there are no data, there is no value.

    Now, to be fair, I've heard of new motors failing. I've yet to see someone conclusively tie failures or even oil use later on in motor life with factory-specified break-in though. It's all exactly what you said, opinions. They're interesting but I'd follow the maker if it were my car.
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    Registered User XRedJar's Avatar
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    Common sense is the best guideline to follow. My only suggestion to what the owner's manual says is to be as smooth as you can. Smooth runs up and down the rev band using low to moderate engine loads, low boost only (5 lbs, and not often) was what I did for the first 500 miles.

    From then on I kept the boost low, and would occasionally rev to 4 or 5k when it could be done smoothly at low loads. I made the increases of rpm and load progressive as I put more miles on it.

    Now, approaching 7000 miles.....I still try and be smooth when I open it up. I don't think there is any problem with giving the car a good run, but I try not to beat on my equipment.
    2013 Ice Silver Premium 5 door - Stage 1 E-Tune

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    Registered User frenziedcage's Avatar
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    Quote Originally Posted by MainFrame View Post
    The rings should be seated by the time you pick it up. I wouldn't worry about it. A little boost (~5psi-10psi) will be fine, and engine breaking is good to clean the cylinder walls. Other than that, stick with everything you already mentioned and you'll be just fine.
    Yo does Subaru use a specific oil for the break in period? Such as a break in oil.

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    Registered User SlimJim8804's Avatar
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    Quote Originally Posted by frenziedcage View Post
    Yo does Subaru use a specific oil for the break in period? Such as a break in oil.
    What's already in the crankcase...

    The break in period listed in the owner's manual only applies for the first 1,000 miles to my knowledge.

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    MAINEiac 11blackSTi's Avatar
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    Quote Originally Posted by XRedJar View Post
    I try not to beat on my equipment.
    You have to beat the equipment once in a while.

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    OMG WTF MainFrame's Avatar
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    Quote Originally Posted by frenziedcage View Post
    Yo does Subaru use a specific oil for the break in period? Such as a break in oil.


    No.. as far as I know they ship with standard Subaru Synthetic already in there.

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    Registered User ProZach626's Avatar
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    You can play with it a little. Revving the engine to 4k isn't that bad. I've almost tapped 5k, on accident, but I generally drive mine pretty easy. I'm at 400 miles now and I've already hit a few back roads. You can still have fun in the car with a light foot.

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    Quote Originally Posted by cmayba View Post
    So just got the call from the dealership my car made the May boat so it should be here in a couple weeks!! They weren't lying when the said 8-12 weeks it will be here probably either week 12 or week 13.
    I ordered mine in march so im hopin that it made the boat as well!

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    Registered User cmayba's Avatar
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    Quote Originally Posted by N/atoboosted View Post
    I ordered mine in march so im hopin that it made the boat as well!
    Feb. 22nd was when i ordered mine the anticipation is killing me

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    Registered User oguitar's Avatar
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    I bought my car in 2002. During the test drive I really pushed the car hard. I was scaring the salesman a little bit. SInce then I have driven the car hard and have had no issues. 116k miles of mostly city driving. Treat the car with respect but also drive it like it was meant to be driven. Also stay away from 5w30 oils.
    Life is like riding a bicycle in order to keep your balance you must keep moving.

  14. #13
    Registered User cmayba's Avatar
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    That's why I ordered one, I beat the snot outta the one on the lot.

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