[QUOTE=scott53;32323]"...for several full throttle accelerations, and deceleration (rings need to be loaded with both for proper BMPE to seat properly)"
Scott53, I'm assuming you can still do all this and keep it under the recommended 4000 RPMs that GM recommends...
I have 150 miles on it already and have "gotten on it", but kept it under the 4000 RPMs. Are you all saying that isn't necessary during the "several full throttle accelerations and decelerations"? Are the to rings already fully seated by the 150 miles?
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I would think the folks that designed these engines didn't call it a day at that point and head up for the house. I would imagine it is as important to them as it is us to get the most out of these 6.2's. I've never had a poor performing short lived engine by following the break in guidelines from the manufacture. I've owned over 50 new cars..
How much break-in is already done on the engine even before it is married to the chassis? I thought they ran these engines on stands to get some wear and seating on them, and then drained the oil (to get the metal filings out). Then they put the engine on the chassis a few weeks later. Also, I thought this was why it is no longer required to change the oil the first time until a regular service interval.
Am I incorrect in any or all of the aspects above?
That's interesting. Your suggestion is just the opposite of what GM recommends for the first 500 miles.
Honestly, unless you are a cretin idiot and somehow super baby the car or choose the opposite extreme, you will be fine.
"Scott53, I'm assuming you can still do all this and keep it under the recommended 4000 RPMs that GM recommends..."
Yes, you can. I have been very careful to stay under 4000 RPMs when doing the acceleration portion. I am not smarter than a GM engineer and will not go against what the manual instructs for max break in RPMs in the first 500 miles. I must admit that the deceleration part was easier with my M6 GS than it is with my A6 Stingray. But I still think it is worth doing and I don't see how it would do any harm. And it does keep you driving at varying speeds per the insturctions in the manual. I hit 178 miles this evening. I'm not certain for how many more miles this makes sense. I'll probably keep this up to at least the 200 to 300 mile mark.
If you change to a conventional 5-30 dexos approved oil for the first 500 miles that would not be a warranty issue would it?
No....there are no warranty police for things like oil analysis.....unless you screw it up.......
1. Take a long trip
2. Take it up to 70 and put the cruise control on
3. Put it in M and start using the paddles
4. Every 10 - 15 min, shift between 6, 5 and 4, and back up....
Done....it's the rpm that matters, not speed.....this also kills AFM for breakin......
I still feel that way...break-in is way over thought..but if you are OCD, this is the way to do it....
I definitely have OCD, there is no doubt about that...