Break in period?

[robvas]

But guys that post vids like that one purporting to be experts, without warning of possible downsides, piss me off immensely.
Rant over

One of those videos was from guys from a piston ring company, the other is an engine builder who has put together and torn apart more engines than...

Who better to know?

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[LouG]

We will have to disgree on this. I have more faith in the people who design and manufacture engines.
Obviously they do screw up sometimes, but we now have street engines that would have beaten race engines of 30 or so years ago.

It just doesn't make any sense that you'd get triple the ring gap. Engines don't wear that way.

Well, heat is an issue. Overheated rings lose tension. Hard break in does create more localised heat in the new rings.
We had a Holden patrol ute that was seriously cooked in a long chase. I never seen an engine get that hot and still run fine. No knocks, slaps or anything untoward.
But it used a lot of oil afterwards. When I was in the trade we often saw oil burning, head gasket blowing and/or cracked blocks/heads after serious overheating.

If I can dig up the vid I'll post it, it was 7 or 8 years ago.

 

[GrabThatBlue]

I drove mine hard since new and never had a problem. 2 years ago and 12,000 miles still great!

12.000 miles is still considered new.

 

[kinelisch]

12.000 miles is still considered new.

12,000 is not new. It’s used.

 

[Dark Sprite]

Perhaps he should’ve said “young” rather than “new” if you want to be pedantic, but you knew what he meant - still too new for any relevant issues to have arisen related to breaking in the engine.

 

[robvas]

Perhaps he should’ve said “young” rather than “new” if you want to be pedantic, but you knew what he meant - still too new for any relevant issues to have arisen related to breaking in the engine.

Considering how much wear happens in the first 500-1000 miles compared to 12,000....the engine is way beyond broken in at that point.

 

[LouG]

12,000 is not new. It’s used.

Report back to us at 100K.
Not being a smart arse, just pointing out that will be the proof of the pudding.

 

[Frogdog1]

Is the car broken in yet?

 

[GrabThatBlue]

12,000 is not new. It’s used.

10 miles driving a car is used too with your theory. We are not talking about used or unused. We are talking about longtivity of a car. With 12.000 miles the car is still new. You can't say that the car is good or bad just with 12.000 miles in. Every car reaches 12.000 miles without issues unless it's a Monday car.

 

[LouG]

10 miles driving a car is used too with your theory. We are not talking about used or unused. We are talking about longtivity of a car. With 12.000 miles the car is still new. You can't say that the car is good or bad just with 12.000 miles in. Every car reaches 12.000 miles without issues unless it's a Monday car.

Unless that 12,000 miles is done over 20 years. Then new would be stretching it.

 

[GrabThatBlue]

Unless that 12,000 miles is done over 20 years. Then new would be stretching it.

Yeah, I forgot that many people here don't drive.

 

[hal26]

Bought a new Porsche 911 in 2021 (now sold due to bad knees and 6' 4" tall) and the break-in was 2000 miles at or below 4000 RPM. The computer keeps track of RPM "events" and it is a known fact that engine warranties have been voided due to multiple runs up past

redline during or after break-in.

 

[AZ_Ryan]

Bought a new Porsche 911 in 2021 (now sold due to bad knees and 6' 4" tall) and the break-in was 2000 miles at or below 4000 RPM. The computer keeps track of RPM "events" and it is a known fact that engine warranties have been voided due to multiple runs up past

redline during or after break-in.

Damn. I cant imagine keeping Porsche under 4k for two thousand miles. That just doesn't sound right. I can barely keep mine under 3k when its warming up.

 

[GripTime]

The break in debate is a popular one. People have different experiences and methods. I always follow the break in suggestion, but more importantly I make sure the car is always pushed. I have done that with all my engines with good success. The only engine I had go bad was my beloved STI and wouldn't you know I didn't have that car from new. I got it with 14K. So who knows how it was broken in. Two dealership mechanics on two different cars told me explicitly to make sure the car is continuously driven hard. So I obey.

 

[robvas]

The break in debate is a popular one. People have different experiences and methods. I always follow the break in suggestion, but more importantly I make sure the car is always pushed. I have done that with all my engines with good success. The only engine I had go bad was my beloved STI and wouldn't you know I didn't have that car from new. I got it with 14K. So who knows how it was broken in. Two dealership mechanics on two different cars told me explicitly to make sure the car is continuously driven hard. So I obey.

Was a Subaru it wasn't meant to live long either way

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