Ls-2 break in period

What is the break in period for the LS-2? I got and '05 last night and romped it a bit. Wondering if that was bad for it. I probably should have asked before I got on it but I just couldn't resist.

Originally posted by rexus31@Jan 13 2005, 10:07 AM
What is the break in period for the LS-2? I got and '05 last night and romped it a bit. Wondering if that was bad for it. I probably should have asked before I got on it but I just couldn't resist.

I would think they would have something in the owner's manual about this.

In my WRX manual, it specifically said to avoid full throttle and RPMs over 4000 (Redline on the WRX is 7000) for the first 1000 miles.

Originally posted by rexus31@Jan 13 2005, 10:07 AM
What is the break in period for the LS-2? I got and '05 last night and romped it a bit. Wondering if that was bad for it. I probably should have asked before I got on it but I just couldn't resist.
Here is a quote out of the owners manual. This is the owners manual standard script for all GM vehicles for at least the last five years, but I did get this specifically from the '05 GTO manual.



New Vehicle Break-In
Notice: Your vehicle does not need an elaborate break-in. But it will perform better in the long run if you follow these guidelines:

• Keep your speed at 55 mph (88 km/h) or less for the first 500 miles (805 km).

• Do not drive at any one speed, fast or slow, for the first 500 miles (805 km). Do not make full-throttle starts.

• Avoid making hard stops for the first 200 miles (322 km) or so. During this time your new brake linings are not yet broken in. Hard stops with new linings can mean premature wear and earlier replacement. Follow this breaking-in guideline every time you get new brake linings.

for the first 200 miles don't use the brakes too hard and about the engine it is recommemnded that u keep the enigine down and some times hit at 4000 rpm so the parts can wear all together avoid goin over 4500 rpm and at highway dont keep the eninge in the same rpm sometimes give it a rev too about 3000 rpm and ur engine will run smooth + don't go over 100 mph on ur first 100 miles i saw all this on a corvettes owners manual video it's go the same enigine so

Those are the basics, but I like to at least do a full throttle say through second gear just to make sure the engine gets used to it, and that all the seals seat properlly. Just don't do it all the time.

The guidelines I followed when breaking in my built Honda motor:

First 250 miles: Keep revs under 4500rpm (which would be like 3000rpm in LS2 terms) Try to drive the car at random speed/RPM as often as I can. Make random 'rips' from lower RPM's to 6500rpm every 25 miles or so.

Next 250 miles: Same as above except keep revs under 5500rpm (4000rpm in LS2 terms) and random rips to 7500rpm.

Last 500 miles: Same as above except keep revs under 6500rpm (5000rpm in LS2 terms) and random rips to redline (8500rpm at the time, later upped to 9000rpm).

This worked well and the engine ran very strong until I parted it out a few months ago.

I always take it easy on my cars the first 500 miles. I am really not sure on exact specs.

Just remember, not only are you breaking in the engine but you are also wearing in the brake pads and rotors and on manuals the clutch and flywheel friction surfaces will also work better in the long run if you are easy on it for a few hundred miles at first. Thats not to say you cant do some zips on the highway but i'd avoid super hot launches or hard braking to begin with.

Yes, I have been thinking about this, too...
That is why I took a secondary color choice to be sure that mine had not been tested by a "curious" kid or salesman as he delivers the car.

Mine is guaranteed to have 1 or 2 miles on it.

...however, I ask this question:
If the car comes with Mob.1 synthetic oil (and synthetic is too slippery for break in wearing and part seating), did they break it in at the factory, then change the oil to synthetic, and then ship the car ?

If this is so, isn't the motor broken in already (yes, I acknowledge that the other parts of the car need special "LOL" care for this period) ?

I have heard that the 'Vettes are dogged on like go-carts at the factory for ring-seating purposes. - then there is this guy... http://www.mototuneusa.com/break_in_secrets.htm - who is extreme in his methodology.

I am just looking for a few answers, as my car has not arrived yet, and you folks seem to be quite knowledgable, so I don't want to muck anything up.

Thanks in advance.

Just received the oil analysis results from Blackstone Laboratories on a sample taken when the oil was changed at 6,906 miles.

Was surprised when they reported, "The engine is still undergoing wear-in, which is why copper and silicon read at these levels." (160 PPM and 35 PPM, respectively). I would've thought that the engine would be completely broken in by 7K miles, but maybe not.

Just received the oil analysis results from Blackstone Laboratories on a sample taken when the oil was changed at 6,906 miles.

Was surprised when they reported, "The engine is still undergoing wear-in, which is why copper and silicon read at these levels." (160 PPM and 35 PPM, respectively). I would've thought that the engine would be completely broken in by 7K miles, but maybe not.

I too would have thought the vehicle to have been broken in by almost 7,000 miles. I have got to say that there is no way I could have kept my foot out of it for a 7,000 mile break-in period.

-K

Question! What would be a good recommended freeway speed for a new engine? 06 GTO.

Question! What would be a good recommended freeway speed for a new engine? 06 GTO.well if you go by the break in speed it says 55mph or less , you do this on the highway and youll have a lot of pissed off people behind you. now if your like me that break in rule went out the window on day one . my gto comes out on the wkend and i do local drive so the speed varys and sometimes i get on it , so main thing just go out and enjoy your gto.

^^^^^^^^^Thanks for your input on the situation I appriciate that. Yeah your right that rule went out the window the first day.:D

I too would have thought the vehicle to have been broken in by almost 7,000 miles. I have got to say that there is no way I could have kept my foot out of it for a 7,000 mile break-in period.

-K
I will say it will take right around 10k miles for these things to be fully broken in IMO.

I took it easy on the car for the first 500 miles, did a few good revs on it to help it seal. After that I started to drive it normaly. No leaks, no burning oil :)

I will say it will take right around 10k miles for these things to be fully broken in IMO.

Not knowing any better, I have to ask, what is a typical break-in for a non-high performance vehicle like a Buick (not a Buick GN)? Is it significantly less than the 10K miles you have suggested for the GTO? I was under the impression that the LS2 would have been completey broken in well before 10K. Why do you think that 10K miles is when the GTO is fully broken-in? You know I just had to ask. :)

-K

Not knowing any better, I have to ask, what is a typical break-in for a non-high performance vehicle like a Buick (not a Buick GN)? Is it significantly less than the 10K miles you have suggested for the GTO? I was under the impression that the LS2 would have been completey broken in well before 10K. Why do you think that 10K miles is when the GTO is fully broken-in? You know I just had to ask. :)

-K
I've asked the same question to my tuner and the owner of the shop that did my cam. I had the car dynoed around 786 miles and asked how long befor it would be broken in so I could come back and get some better #'s (not knowing I was going to cam the car and stuff then). They both said 10k is around how long it takes, I'll take their word for it over what I think which I thought would be 7-8k.

I've asked the same question to my tuner and the owner of the shop that did my cam. I had the car dynoed around 786 miles and asked how long befor it would be broken in so I could come back and get some better #'s (not knowing I was going to cam the car and stuff then). They both said 10k is around how long it takes, I'll take their word for it over what I think which I thought would be 7-8k.

The next time I make my way over to Thunder Racing, I will pose the question to them to solicit their opinion. It will be interesting to hear what they have to say on this subject. What would be even more interesting would be to take a poll of those in the know.

-K

Question. So if you've gotten on it before the 10k mile mark are you messing up the engine?:mad: Hope that not the case.:D

Question. So if you've gotten on it before the 10k mile mark are you messing up the engine?:mad: Hope that not the case.:D

I don't think that is what we are saying here. Otherwise, I am in big trouble. :eek:

-K

Me too! LOL!:D

Question. So if you've gotten on it before the 10k mile mark are you messing up the engine?:mad: Hope that not the case.:D
Nah. The way I see break in is when the motor will be at it's full potential IMO.

If you were to put 10w-30 mobile1 syn oil instead of 5w-30 mobile1 syn oil would it damage your engine. I accidently did this about 2 to three weeks ago:mad: when I was having a bad day and not thinking straight. Any opinion would appreciated

I say, "no." I would not expect it to hurt anything. Both are 30 weight lubricating fluids. The difference is during very cold weather.

-K