Break in oil?
Thread Starter
Melting Slicks
Joined: Jul 2010
Posts: 2,762
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From: SUFFIELD CT USA 2023 C8 CORVETTE UN-MODIFIED FINALIST
2023 C8 of the Year Finalist - Unmodified
Break in oil?
I was always told not to use synthetic oil for break in. Do are cars really come w/ Mobile 1 or is it a special oil. Are the engines already broke in on a dyno before we get them, I tried the search function w/ no luck ?
Team Owner
Joined: Oct 2004
Posts: 27,420
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From: San Clemente CA
They come with Mobil 1 5w 20 and it's not a break in oil. Read your manual about breaking it in. I think my 05 said 500 miles but that's not for the engine it's for the gears in the trans and differential. The brakes need breaking in also.
Safety Car
Joined: Sep 2007
Posts: 4,359
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From: Los Alamitos California
St. Jude Donor '09
From a different thread but on topic.
San
Also, your engine would have made 185-190 at 10 miles...there is no break-in for the engine, the rings are seated by the time you pick your car up. That's the result of GM using moly rings with a plateau finish honing process...they've been doing it that way for many years. The break-in is mainly for the ring and pinion, brakes, and somewhat for the transmission. 
Thread Starter
Melting Slicks
Joined: Jul 2010
Posts: 2,762
Likes: 820
From: SUFFIELD CT USA 2023 C8 CORVETTE UN-MODIFIED FINALIST
2023 C8 of the Year Finalist - Unmodified
Thank-you San, so that implies that the new ring technology breaks in very quickly, or the engines are run on a dyno and pre - broke in. Either way the old advice about break in oil does not seem to apply here!
Safety Car
Joined: Sep 2007
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From: Los Alamitos California
St. Jude Donor '09
San
Racer
Joined: Feb 2012
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From: Ponte Vedra Florida
You mean 5w30 not 5w20 right or did they make a change since my 2008 was built?
Team Owner
Joined: Oct 2004
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From: San Clemente CA
Racer
Joined: Feb 2012
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From: Ponte Vedra Florida
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Team Owner
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From: San Clemente CA
