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OEMs That Use Break-in Oil? #5458517 06/20/20 01:33 PM
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2015_PSD Offline OP
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Every now and again, someone will post they have purchased a new vehicle and will ask for a suggested OCI for the first OC. Often times, someone will state to leave the oil in for "x" miles because it is break-in oil from the factory.

This begs the question of what OEM uses break-in oil as the factory fill? Aside from the assembly lube that some OEMs use that has extra moly or the like in it, I am of the opinion that most OEMs use the same oil that you or I could buy off the shelf as the factory fill.

What say you? Am I right or wrong?


2019 o)|||||(o Rubicon Wrangler Unlimited 3.6L V6 [Kendall GT-1 Max + Ultra]
2018 Mercedes Benz C300 2.0L Turbo [Pennzoil Platinum + Mann filter]
Re: OEMs That Use Break-in Oil? [Re: 2015_PSD] #5458519 06/20/20 01:41 PM
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Mainia Offline
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Honda and Mazda use a high moly oil. People say it is in the assembly lube, but with Mazda clearly at one point had the high moly oil stated right on the bottle. It makes sense to run a 500-600ppm oil fot it's first oil.


2018 Lowered Hyundai Kona AWD 1.6T https://www.hyundaikonaforum.com/showcase/2018-kona-awd-1-6t-lowered.1162/
2014 Toyota Rav4 AWD
2005 Honda Civic
Re: OEMs That Use Break-in Oil? [Re: 2015_PSD] #5458520 06/20/20 01:46 PM
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bbhero Offline
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I think you are right that it's the same oil as one could purchase off the shelf. And that the oil is obviously purchased in large bulk quantities as well.


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Re: OEMs That Use Break-in Oil? [Re: 2015_PSD] #5458523 06/20/20 01:55 PM
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On the transmission side, the Dexron used in the GM plants was identical to what was sold over the counter from the same supplier (Petro Canada back when I was working).
Allison added a biocide because there were periodic issues with fungus growth in heavy vehicle transmissions that were in storage for a long period before installation and running in a vehicle.

Re: OEMs That Use Break-in Oil? [Re: 2015_PSD] #5458532 06/20/20 02:01 PM
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I know Mazda still fills their new engines with high moly oil. Honda used to but I haven’t any evidence as of late.

They don’t call it break in oil either. It’s just called factory fill. Maybe a minor point.


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Re: OEMs That Use Break-in Oil? [Re: Mainia] #5458548 06/20/20 02:24 PM
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Originally Posted by Mainia
Honda and Mazda use a high moly oil. People say it is in the assembly lube, but with Mazda clearly at one point had the high moly oil stated right on the bottle. It makes sense to run a 500-600ppm oil fot it's first oil.


Or Idemitsu Zepro oil. VOA..

Re: OEMs That Use Break-in Oil? [Re: 2015_PSD] #5458558 06/20/20 02:43 PM
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Gene K Online Content
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Does it really matter whether it's the oil or assembly lube?

The real question is how long is it needed?

If I remember right GM Crate Engines used to call for a 50 mi drain (add GM Liquid Assembly Lube during refill) and then 500 mi. After that just straight 10W-30.


Gene

2014 Mustang GT 5.0 SC - 675 bhp
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2018 F150 4x4 3.5 EB
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Re: OEMs That Use Break-in Oil? [Re: 2015_PSD] #5458566 06/20/20 02:55 PM
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Trav Offline
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None that I am aware of today, true break in oils were low spec short run oils high in zddp primarily for camshaft/lifter break in which it did very well. The last thing you want in a new engine is something like MoS2 (not to be confused with tri nuclear moly), the rings and other parts need some initial wear to bed in properly.


ASE L1, Master. Deutsch Meisterbrief.
Re: OEMs That Use Break-in Oil? [Re: Gene K] #5458573 06/20/20 03:09 PM
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2015_PSD Offline OP
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Originally Posted by Gene K
Does it really matter whether it's the oil or assembly lube?

From the aspect of people posting not to change the oil early because it is special or break-in oil, yes, because it is not used today. I would posit there is also limited use of assembly lube in modern engines too since application of it has to be done manually or with very special equipment. Likely just as easy to spray engine oil on the parts as they are assembled.

Just my thoughts and I could be wrong...


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2018 Mercedes Benz C300 2.0L Turbo [Pennzoil Platinum + Mann filter]
Re: OEMs That Use Break-in Oil? [Re: 2015_PSD] #5458671 06/20/20 05:21 PM
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The Subaru Idemitsu factory fill has higher moly and ZDDP than the dealer service fill. Odd thing is that sometimes Subaru factory fills show high ZDDP and sometimes they do not.


'20 Subaru Outback Onyx XT | Idemitsu Zepro 0W-20
'04 Subaru Forester 2.5XT | Castrol Edge 0W-40
Re: OEMs That Use Break-in Oil? [Re: bluesubie] #5458688 06/20/20 06:00 PM
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Originally Posted by bluesubie
The Subaru Idemitsu factory fill has higher moly and ZDDP than the dealer service fill. Odd thing is that sometimes Subaru factory fills show high ZDDP and sometimes they do not.


Can you provide a source for that information?

When I bought my Outback, I specifically inquired to Subaru on this subject, wanting to know how long I should wait to change the factory fill motor oil. Subaru replied that as the factory fill was standard synthetic 0W-20 motor oil, there was no need for any particular oil change interval for the factory fill. They further stated that if I wanted, I could change the oil early but there was no reason to change it before the recommended oci.

Further research told me that almost none of the manufacturers fill their engines with "break-in" oil any longer, as it really was not necessary with modern engines and today's engine assembly practices. So I'm pretty skeptical when I see claims that any OEM still puts "break-in" oil in an engine.


In God we trust. All others bring data.

2013 Subaru Outback 2.5i - M1 HM 0W-20 & NAPA Gold filter
2014 Mercedes E350 M276 - M1 European 0W-40 & Purflux filter
Re: OEMs That Use Break-in Oil? [Re: 2015_PSD] #5458809 06/20/20 09:50 PM
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From what Ive read Honda does not use break in oil, its the moly based assembly lube is what makes the FF different.

Source was the Moderator of the Ridgeline owners club site.

They say to keep the FF fill in for a normal OCI

UD




Last edited by UncleDave; 06/20/20 10:10 PM.

Uncle Dave
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Re: OEMs That Use Break-in Oil? [Re: 2015_PSD] #5458827 06/20/20 10:44 PM
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Who is qualified to answer this question with any semblance of accuracy ? Unless someone is directly involved at the factory level, it's just hearsay....

Re: OEMs That Use Break-in Oil? [Re: hallstevenson] #5458830 06/20/20 10:45 PM
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Originally Posted by hallstevenson
Who is qualified to answer this question with any semblance of accuracy ? Unless someone is directly involved at the factory level, it's just hearsay....


Occasionally factory reps participate on brand specific websites.

UD


Uncle Dave
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Re: OEMs That Use Break-in Oil? [Re: hallstevenson] #5458941 06/21/20 06:45 AM
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Trav Offline
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Originally Posted by hallstevenson
Who is qualified to answer this question with any semblance of accuracy ? Unless someone is directly involved at the factory level, it's just hearsay....


My cousin is an powertrain engineer (specifically their performance engine line) for for a large manufacturer and has been for a very long time, while that may not be good enough for you information I get from him from some of our long conversations has been very educational for me.


ASE L1, Master. Deutsch Meisterbrief.
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