Like BlownChevy said, they are "broke" in from the factory. Change the oil after 500 miles for safety then let her rip! Enjoy it....

 

i think your 5.3 needs to see boost before 5000 miles.

 

drive it like you would regularly

 

I didn't change my VHO at 500 because I took the truck on a 1,000 road trip. I changed it, drove it easy for another 1000 and then hit it.

 

edit, switched to synthetic.

 

I haven't changed the oil yet on the 05 and I didn't on the 03 either until about 4000 miles.

 

But I broke mine in on the dyno and then changed to synthetic after 200 miles.....And then went all out!

 

run the poo poo out of that bitch.It can take it

 

There will be a lot of opinions...

I've built a small handfull of two stroke motorcycle and snowmobile motors. My break-in for those virgin motors is a good amount different than if you were to buy a vehicle like a motorcycle or car/truck. With some of these motorcycles, and I hear some of these new vehicles - either the engine is run on a engine dyno, or the vehicle on a chassis dyno - they're supposedly "put through their paces" to make sure everything is in order. I'm quite certian my motorcycles get bounced off the limiter right at the factory.

I've broken in two high performance motorcycles (with less than 4 miles on them), and I've broken in three later model Chevy's. A 4.3, a 5.3 and this 6.0. All new, off the lot with around 4-5 miles on them.

I babied a motorcycle, and the 4.3 truck. I will never baby a new vehicle again. The motorcycle burns oil when it's getting spanked, and the 4.3 retired pretty early, also with oil consumption issues. Could have been coincidence... maybe not though...

Right off the lot, I put the pedal to the floor in the 5.3. That motor ran absolutely perfectly, with hardly any oil consumption up to about 40K miles, where it was traded for this truck. I ran this one hard too, and I'm in the same boat as above... little to no oil noticeable consumption.

When I say 'run hard' I don't mean doing a night of drag-racing... but very 'hearty' squirts of gas. Some long, some short. Different gears/speeds are good to.

I changed my oil in both trucks at 500 miles. I don't think it was necessary at all. Very clean, and no shavings. (unlike the motorcycles)

 

I was really nice to my 5.3 and it never burned oil.