[Zr8000]

Originally Posted by Alpha1BC

I believe it's more to do with driveline vs. the engine (LT1 crate engine break in process only says 500 miles). Camaros have limited slip diffs while Silverado's typically have locking diffs, and limited slip should need more time under varying load to prevent scoring/hum later in life. Expected use is probably a factor as well since Silverados likely aren't being flogged as hard as Camaros.

Most Camaros don’t get flogged hard at all. My 2014 Silverado when I got new, I was towing 8,500 pounds right off the lot when I picked it up. That thing had a heavy trailer on the back of it, it’s entire life and went well over 200k without an engine issue. My camaro I have romped on since day one and it is fine. IMO most Camaros are babied to death and Silverados are beat on because a lot of them are used as work vehicles. I bet less than 2% of Camaros actually see a track where you can actually beat on them.

[sactownbwoy]

Originally Posted by Zr8000

Most Camaros don’t get flogged hard at all. My 2014 Silverado when I got new, I was towing 8,500 pounds right off the lot when I picked it up. That thing had a heavy trailer on the back of it, it’s entire life and went well over 200k without an engine issue. My camaro I have romped on since day one and it is fine. IMO most Camaros are babied to death and Silverados are beat on because a lot of them are used as work vehicles. I bet less than 2% of Camaros actually see a track where you can actually beat on them.

Judging by the mileage on here and the Facebook groups I'm in people post about, I would say you are 100% correct in your assessment.

[MatthewAMEL]

The 1,500 miles is for the diff. And it's only applicable for the eLSD. If you don't have a SS 1LE/ZL1/ZLE, then I wouldn't worry about 1,500 miles.

[nos4you]

Originally Posted by MatthewAMEL

The 1,500 miles is for the diff. And it's only applicable for the eLSD. If you don't have a SS 1LE/ZL1/ZLE, then I wouldn't worry about 1,500 miles.

So does the manual state to change the fluids again at 1500 or is everyone just doing it for good measure?

[tlr3715]

Did the Cadillac CTS have an available ELSD? It had the same 1500 brake in period suggestion.

[Alpha1BC]

Originally Posted by Zr8000

Most Camaros don’t get flogged hard at all. My 2014 Silverado when I got new, I was towing 8,500 pounds right off the lot when I picked it up. That thing had a heavy trailer on the back of it, it’s entire life and went well over 200k without an engine issue. My camaro I have romped on since day one and it is fine. IMO most Camaros are babied to death and Silverados are beat on because a lot of them are used as work vehicles. I bet less than 2% of Camaros actually see a track where you can actually beat on them.

While that may be true, there are still some that do beat on them within the bounds of the warranty, and as such I'd still speculate that that's included in the blanket break-in procedure that covers all Camaros.

Originally Posted by MatthewAMEL

The 1,500 miles is for the diff. And it's only applicable for the eLSD. If you don't have a SS 1LE/ZL1/ZLE, then I wouldn't worry about 1,500 miles.

Don't forget about the mLSD in the SS (and maybe the 4/6 cyl 1LE?) that would also want to do 1500 miles.

Originally Posted by nos4you

So does the manual state to change the fluids again at 1500 or is everyone just doing it for good measure?

It gets a bit fuzzy between the owners manual that comes in all Camaros and the high-performance supplement that comes with the variants that are warrantied for track use. IIRC:

Engine oil is at 500 and 1500, then follow oil life monitor or change after some specified amount of track time (I want to say 10 hours but don't remember off the top of my head), whichever occurs first.

Diff fluid is 1500 miles (for xLSD types) then it depends on usage. If not tracking it, it's whatever the regular service interval is. If tracking it, it's a change again after the first track day then every 20 hrs I think, but again don't fully remember the exact number.

Trans fluid for MT doesn't have an initial break-in change recommendation that I can recall, but its service interval is different between street-only driving and track driving (I think this one was 24 hrs, but I may have this one flipped with the diff track time interval).

I'm not sure about AT trans fluid, but I'd guess it's somewhere in the ballpark of the MT intervals.

[N Camarolina]

Originally Posted by Alpha1BC

I believe it's more to do with driveline vs. the engine (LT1 crate engine break in process only says 500 miles). Camaros have limited slip diffs while Silverado's typically have locking diffs, and limited slip should need more time under varying load to prevent scoring/hum later in life. Expected use is probably a factor as well since Silverados likely aren't being flogged as hard as Camaros.

This.

They probably wrote the owner's manual break in procedure for the most break-in sensitive models (SS 1LE/ZL1 etc). If the lower level models don't require as much drive-line break in miles (I am not sure, given the particular hardware), GM probably didn't bother to discriminate in owners manual because they didn't want the hassle and a more conservative (longer than necessary?) break in for these models wouldn't do any harm.

Proceed as you like, but I'd try to follow the specified break in procedure as it's not rediculous. Go for some long drives for fun. You'll be there before you know it.

[WhiteMale]

I dont recall exactly but never changed the diff fluid on my 1LE until in to the 30K mile range and it was a non-issue in the daily driver hard street use category. Ill probably change this ZL1 though just to do it before winter but I don't feel compelled to do anything else.
I made an 850 mile road trip that started with 4 miles on the clock and drove it normally the whole way, changed the oil at 1K and started banging on it.
My methods haven't failed me yet.

[ZPirate]

Originally Posted by Zr8000

Most Camaros don’t get flogged hard at all. My 2014 Silverado when I got new, I was towing 8,500 pounds right off the lot when I picked it up. That thing had a heavy trailer on the back of it, it’s entire life and went well over 200k without an engine issue. My camaro I have romped on since day one and it is fine. IMO most Camaros are babied to death and Silverados are beat on because a lot of them are used as work vehicles. I bet less than 2% of Camaros actually see a track where you can actually beat on them.

Originally Posted by sactownbwoy

Judging by the mileage on here and the Facebook groups I'm in people post about, I would say you are 100% correct in your assessment.

Many may not flog their Camaros, but although my Camaro isn't my daily driver, when I do drive it I romp on it pretty hard. I certainly drive it a lot harder than I do my other vehicles (except for my Z which after 20 years I still drive it like I stole it). And that's what it's made for.

[HDRDTD]

Back when the 5th gen ZL1's came out, they were the first cars that came with the 1500 mile break-in period, but nobody could tell us why.

One 'possibility' that we thought of was that the long break-in wasn't for the engine/drive train, or any other part of the car, it was so that the new owner would take the first 1500 miles to get used to the power and capabilities that this beast has, before they're allowed to put the hammer down and discover the full might of what they just bought.

Remember, this was back before it would be common place to have new cars with almost 600 hp and designed to take to the track while keeping a factory warranty.

Like i said, it was just one semi plausible reason for the long 1500 mile break-in period.

[JTS]

C8 Corvettes limit the owner to4000rpm for 400 miles , then the dash changes and RPMs are not limited. My neighbor has one , well he moved 3 weeks ago. So I followed that for 400 miles then 5k RPMs til 800 and 5500 RPMs to 1k with my 22 SS , doing the same with ZL1, oil change 500 to 600 with Diff. I hope Happy Motoring