07-17-2020, 03:48 PM | #43 | |
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The one thing that came to my mind that might explain the long period was the horsepower. Remember this was back in 2011 when buying a new car with 580hp was a big deal. I believe the ZL1 was the first to come with a selection of PTM modes, of witch PTM 5 was meant to be used when on a 'well-prepped' drag strip. It also came with Traction Control, Stability Control, etc, etc. Quite the muscle car at that time. Of course many new owners would immediately turn off on the nannies, end up wrapping it around a tree. My guess is the long break-in period was needed for the mechanicals whether the transmission, the rear end, the engine, etc, To me it was to let the new owner operate the car at a more sedate level until they could get a sense of the power/potential of the car before letting them stretch it's legs finally at 1,500 miles. But again that's just my own opinion. |
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07-17-2020, 06:33 PM | #44 | |
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07-17-2020, 07:13 PM | #45 |
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Modern "break-in" periods are mainly for driveline parts. Engines really just need an initial oil change after a few hundred miles to get out any metal shavings that might has been caught in the oil filter. But I personally always break in my new cars the way I drive them. HARD. 0 miles or 1500 miles, I will drive a car to redline and beat on it. Never had a problem and I have bought a new car every two years or so over the last 15 years. Granted my cars never get past 15k miles or so, so who knows what the extended life of the engines will be.
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07-17-2020, 08:07 PM | #46 | |
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07-17-2020, 08:57 PM | #47 |
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This is a debate as old as the hills. I’ve always had good luck with breaking them in like you are going to drive it. If you’re gonna baby it, give it a nice long gentle break in. Otherwise just drive it like ya stole it.
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07-17-2020, 09:42 PM | #48 | |
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Not only have I never heard of GM using any special additives in the oil in any of their cars, that's what what kind of "sold me" on the premise that there weren't any in this engine. I opted to do the early oil change because I wanted to visibly inspect the clarity of the oil right out of the gate. I was surprised at how dark the oil was after 600 miles, but it did not appear to be carrying any contaminants. Even after the drain pan sat overnight, there wasn't anything left sitting on the top after the oil had drained away. |
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07-18-2020, 06:24 AM | #49 | |
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point being: it doesn't matter. sh'ts gonna break in or break.
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07-18-2020, 09:50 AM | #50 |
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Well yeah...then it becomes someone else's problem...
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07-18-2020, 10:30 AM | #51 |
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What the heck do those engineers who designed the engine know? Much better to listen to people on the internet!
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07-18-2020, 12:14 PM | #52 |
That’s the part I don’t get. Why tell people there’s a break in period if it’s really not needed? I guess ultimately people do whatever they want with the cars they spend their money on. I guess maybe they’re (The engineers) just playing it safe. Which is what I do. Also, the new C8 won’t even allow you to drive it hard until the break in period is over. So there must be something to the whole break in thing. But, I’m not an engineer so what do I know?
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07-18-2020, 12:34 PM | #53 |
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Break in periods are generally used to allow very small imperfections from manufacturing to "wear in" before you run the mechanical pieces at full tilt. A small particle in the groove of a piston could prevent a ring from being able to fully retract, and that could score a cylinder wall. By running things more conservatively, it can allow that imperfection to wear down so that the ring seats correctly and never causes an issue.
Manufacturing processes are better than they have ever been. Still, there exists the chance of a small imperfection that lighter use can mitigate. Not following the procedure generally will not void your warranty, but there's no reason that we can't all play it safe and follow the procedure. |
07-18-2020, 01:07 PM | #54 |
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The larger the company, the less say engineers have in what info gets published and the more it's up to the legal department. People want the truth and if they can't trust official sources any longer, they will turn elsewhere, always have, always will.
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07-18-2020, 01:52 PM | #55 |
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it takes far more than 500 miles to "break in" an engine. closer to 10k miles before it is 100%. evidenced by those who closely track performance, oil consumption etc. as mileage goes up, so does power and inversely oil use goes down. take big trucks for example, it takes 80k miles before they are "broken in". those engines don't have a restricted use parameter despite making 2k ft lb of tq and very high temperatures.
and since when did anyone trust an engineer? lol
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07-18-2020, 02:15 PM | #56 |
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