The engine should be driven at varying loads and conditions for the 1st 30 miles or one hour without wide open throttle (WOT) or sustained high rpm accelerations.
Run 5 to 6 medium throttle (50%) accelerations to about 4000 rpm and 55 mph and back to idle. (0%)
Run 2 or 3 hard throttle (WOT 100%) to about 5000 rpm and 55 mph and back to idle.
Change oil & filter (not synthetic) and inspect the oil for foreign particles to ensure engine proper operation. (At about 500 miles)
Drive the next 500 miles(12 to 15 engine hrs) under normal conditions. Do not run engine at its maximum rated speed or extended periods of high loads.
Change oil & filter. Again, inspect for foreign particles. (At about 1,000 miles)
Do not use synthetic oil for break-in. It would be suitable to use synthetic motor oil after the second recommended oil change and milage accumulation.


Hope this help you with proper break-in for maximum performance for your NEW G8 GT!
:secret:

thanks for the info. guess i need to give it some more go. I've been easy on it.

-Brian

Isn't the break in proceedure in the manual?

I was going to say the same thing.. I never saw any information telling you to change your oil twice within the first 500 miles..

The engine should be driven at varying loads and conditions for the 1st 30 miles or one hour without wide open throttle (WOT) or sustained high rpm accelerations.
Run 5 to 6 medium throttle (50%) accelerations to about 4000 rpm and 55 mph and back to idle. (0%)
Run 2 or 3 hard throttle (WOT 100%) to about 5000 rpm and 55 mph and back to idle.
Change oil & filter (not synthetic) and inspect the oil for foreign particles to ensure engine proper operation.
Drive the next 500 miles(12 to 15 engine hrs) under normal conditions. Do not run engine at its maximum rated speed or extended periods of high loads.
Change oil & filter. Again, inspect for foreign particles.
Do not use synthetic oil for break-in. It would be suitable to use synthetic motor oil after the second recommended oil change and milage accumulation.


Hope this help you with proper break-in for maximum performance for your NEW G8 GT!
:secret:

NOLTE: This is NOT GM recommended break-in procedure so take it all wit ha grain of salt. Changing the oil at about 40-50 miles as proposed above is pure bunk. Changing again at 500 miles will not necessarily prolong the life of the engine, as it is certified to run without fail for 100,000 miles with the first and subsequent oil change dictated solely by the DIC. Having to run dino oil instyead of full synthetic to begin with is an urban legend. Otherwise the manufacturers wouyld not ship so many vehicles with a factory fill of Mobil 1.

NOLTE: This is NOT GM recommended break-in procedure so take it all wit ha grain of salt. Changing the oil at about 40-50 miles as proposed above is pure bunk. Changing again at 500 miles will not necessarily prolong the life of the engine, as it is certified to run without fail for 100,000 miles with the first and subsequent oil change dictated solely by the DIC. Having to run dino oil instyead of full synthetic to begin with is an urban legend. Otherwise the manufacturers wouyld not ship so many vehicles with a factory fill of Mobil 1.

I would however change oil once between 500-1000 miles with the objective of getting rid of any residue from the manufacturing process. (abrasive particles, metalic dust, dirt, extra nuts and bolts, etc)

I would however change oil once between 500-1000 miles with the objective of getting rid of any residue from the manufacturing process. (abrasive particles, metalic dust, dirt, extra nuts and bolts, etc)

I thought the manufacture did that before they shipped??

I thought the manufacture did that before they shipped??

But just how well did the clean the engine?? I think an early oil change is cheap insurance.

read carefully, change oil at 500 and 1000.

NOLTE: This is NOT GM recommended break-in procedure so take it all wit ha grain of salt. Changing the oil at about 40-50 miles as proposed above is pure bunk. Changing again at 500 miles will not necessarily prolong the life of the engine, as it is certified to run without fail for 100,000 miles with the first and subsequent oil change dictated solely by the DIC. Having to run dino oil instyead of full synthetic to begin with is an urban legend. Otherwise the manufacturers wouyld not ship so many vehicles with a factory fill of Mobil 1.

read carefully....GM suggest at approx. 500 miles then at 1000 miles.
I know the manual suggest somithing similar but, this comes from GM Performance Division.

read carefully....GM suggest at approx. 500 miles then at 1000 miles.
I know the manual suggest somithing similar but, this comes from GM Performance Division.

Hmm, my dad didn't do this on his '93 Chevy Suburban, and his engine has a quarter of a million miles and running strong... My old '94 Caprice that now has around 210k miles that my dad is driving with a LT1 engine didn't have that done.. None of my department's fleet of Crown Victoria's have this done. In fact they don't change the oil till every 6,000 miles and they don't change out car's until they hit 225K. And they are RAGGED on from day one and are driving 24/7.

I've never had any problems, or heard of anyone having any problems because of changing their oil every 3k miles.

That change at 500 then at 1000 is overkill in my opinion.

Im going to edit the first post.

gbcop yea it looks overkill but, I mean is your choice.
I am just fowarding the GM info specially 8+ quarts of oil....
I change my oil on my VETT at about 5,000 miles, I know every 3,000 is un-necesary.

once the rings set in like the first few miles or so, break in is complete.

bet yes should change oil very soon after first 50 miles or so. I usually change the oil right after an initial startup of a brand new motor. After that I change it again after a couple of heat cycles.

I'm willing to bet that if you encounter any warranty problems with your engine, and the ECM has logged your 2 or 3 WOT runs with 100 miles on the engine, that GM is going to try to deny a warranty claim.

There is a break in section in the manual that says no WOT till 600 miles on the clock, along with the car is not broken in till 2k on the clock FYI

There is a break in section in the manual that says no WOT till 600 miles on the clock, along with the car is not broken in till 2k on the clock FYI
Actually, the manual says that break-in is complete at 3000 miles.

Thanks, I knew I shouldn't have posted from memory only.....

The engine should be driven at varying loads and conditions for the 1st 30 miles or one hour without wide open throttle (WOT) or sustained high rpm accelerations.
Run 5 to 6 medium throttle (50%) accelerations to about 4000 rpm and 55 mph and back to idle. (0%)
Run 2 or 3 hard throttle (WOT 100%) to about 5000 rpm and 55 mph and back to idle.
Change oil & filter (not synthetic) and inspect the oil for foreign particles to ensure engine proper operation. (At about 500 miles)
Drive the next 500 miles(12 to 15 engine hrs) under normal conditions. Do not run engine at its maximum rated speed or extended periods of high loads.
Change oil & filter. Again, inspect for foreign particles. (At about 1,000 miles)
Do not use synthetic oil for break-in. It would be suitable to use synthetic motor oil after the second recommended oil change and milage accumulation.


Hope this help you with proper break-in for maximum performance for your NEW G8 GT!
:secret:

Great Break-In procedure - as others have said, many people don't do this, and run their engines fine for many many years, but I'm with C6R, is spending the extra hundred bucks for three oil changes before 3000 really that big of a deal on a $30,000+ car?

One thing I'm not sure if I agree with is not using synthetic oil - what's the reason for this? That it will get into the combustion chamber during the ring break-in? I've never heard a negative to immediately switching to synthetic

I'm willing to bet that if you encounter any warranty problems with your engine, and the ECM has logged your 2 or 3 WOT runs with 100 miles on the engine, that GM is going to try to deny a warranty claim.

And if someone test drives it before you buy and opens it all up???

And if someone test drives it before you buy and opens it all up???
Then you better hope the ECM logged either the mileage or the run hours or some other timeline-type data along with the WOT event.

But I have no idea how the ECM logs data.

Its so funny that people have such a wide range of "procedures" for break in of the engine. Bottom line. Have fun with it but don't beat on it too much in the first 1000 miles. I have 600 miles on the car. I have taken the car to near WOT twice since I have had it. I'm not concerned that the engine will blow up because of that. Coming from an LS2 with 42k really hard miles I'm not afraid of this engine blowing up.

I bought my 98 Z28 and was hard on it from day one, never any problems period.

I bought my 98 Z28 and was hard on it from day one, never any problems period.

Yeah the LSx don't really require a break in period. Once the rings get snug where they want to be their isn't going to much more breaking in to do.

Most guys put a decent tune in their car to let it idel and somewher driveable, heat cycle and change the oil a few times, take it out and drive it at varied rpm's for a few miles and the break in is complete.

I'm willing to bet that if you encounter any warranty problems with your engine, and the ECM has logged your 2 or 3 WOT runs with 100 miles on the engine, that GM is going to try to deny a warranty claim.

You're nuts. If your car has more than 5 miles on it when you take delivery it's seen at LEAST 1 WOT run and GM damned well knows this. They'd be BEGGING for a lawsuit if they started denying claims based on that kind of metric.

I change my oil every time I fill up the tank. It might be a little much, but why take any chances? It really pisses off people if there is a line at the pump. It also pisses off the stupid gas station attendants seeing the oil run all over their cement and down the gutter.

NOLTE: This is NOT GM recommended break-in procedure so take it all wit ha grain of salt. Changing the oil at about 40-50 miles as proposed above is pure bunk. Changing again at 500 miles will not necessarily prolong the life of the engine, as it is certified to run without fail for 100,000 miles with the first and subsequent oil change dictated solely by the DIC. Having to run dino oil instyead of full synthetic to begin with is an urban legend. Otherwise the manufacturers wouyld not ship so many vehicles with a factory fill of Mobil 1.

Ever see what comes out @ 500 miles? Aside from metal particulates from the machining process, it also has assembly lubes, and leak dyes.

Do what you wish, any new vehicle I own gets it's oil changed at 500 and 1,000 miles regardless. I don't want that sh*t in my engine.

Actually many engine builders recommend using a "dino" oil on a fresh motor.

So I am guessing hitting 139 on the way home from the dealer wasnt a good idea...

Ever see what comes out @ 500 miles? Aside from metal particulates from the machining process, it also has assembly lubes, and leak dyes.

Do what you wish, any new vehicle I own gets it's oil changed at 500 and 1,000 miles regardless. I don't want that sh*t in my engine.

Actually many engine builders recommend using a "dino" oil on a fresh motor.

Doesn't the L76 come with an oil filter?

I know I threw a WOT or two when I test drove, Im sure a few people did on that car haha.

I change my oil every time I fill up the tank. It might be a little much, but why take any chances? It really pisses off people if there is a line at the pump. It also pisses off the stupid gas station attendants seeing the oil run all over their cement and down the gutter.

ROFLMAO!:gr_jest::gr_jest::gr_jest: