markjeansonne

I am about to reach 1865 miles on my new / 2019 Porsche C4S.

I am certain I read somewhere that the Porsche Gods determined that, rather than appr.
2000 miles ... that actually at 1865 miles, the engine was fully broken in ....

Anyone ever seen this literature? Anyone can confirm this magic number?

aggie57

0 is the magic number . 1 lap, then go for it.....

markjeansonne

... well, yeah I have to admit, I've been driving the car rather aggressively since day 1 ....

subshooter

The engine was ready for full throttle the day you took delivery of it. Break in is a myth on modern high tolerance clearances computer designed engines. Just saying.

Just make sure you get the oil temp up above 180 degrees first. That is not a myth and it applies at all points in engine life.

markjeansonne

Yeah first day I got the car, appr. 30 mi. on it, driving home from dealer,
an asshat cut me off to prevent me from changing lanes in heavy traffic.
It was intentional b/c the asshat (jealous individual) was mouthing off through
his window.

My exit ramp was nearing, so I had to 'floor it' to catch another gap in
traffic ahead (and also to show the asshat that asshats never win).

So right away vehicle was above 5k rpm's, at least briefly. Vehicle
was well warm by then, so all is good.

Riz

I thought it was 937.5 miles

3point8

614.75 miles

markjeansonne

Ok, I found a reference to, apparently, a German Porsche 997 owner's manual, which
references 3000 km, which is rounded off to 1865 miles.
(So I know I did read it somewhere. Now whether it applies to my 2019 C4S ? ???)

chuckbdc

Depends on where. Simple matter of relativity.

markjeansonne

arcamalpha

It’s a difficult debate with little evidence available to the general public.

My point or view for what it’s worth:

• Pro/race engine builders always run in their engines.
• i’m yet to see a mass market manufacturer run in their engines in the factory
• the manufacturers want to maximise reliability of their cars. They wouldnt encourage a run-in unless it improved reliability.

I believe in only using torque and revs when the oil is properly hot (as per comment above) and also stick to the run-in schedule quite strictly.

limegreen

Unless your car comes to you with ZERO miles on the odometer it's also virtually impossible to determine how it was driven prior to your taking delivery of it. Typically before it's in the first owners hands the average luxury / sports type car has already been driven by several people including transport drivers, salesmen, technicians and possibly even test drives if it was a vehicle taken from the dealers inventory.

Break-ins for any type of "new" vehicle are a complete crap shoot with no definitive proof of whether it is good, bad or matters at all in the big picture....

DY369

Got to love internet experts with no skin in the game.

Same person busting the myth of engine break-in looks like he swaps cars every few years. How does he know what the engine would or would not have been like at 100,000 miles if it had been run in correctly???
He's dumped that problem on to the next owner by not following the Porsche manual.........and then brags about it. Exactly why I don't buy used cars.

Nottoworry

I’m curious about this too. So many different things you hear. My SA said you don’t need a break in period. A different SA said the ECU automatically limits the car appropriately so you don’t have to worry about it. When I went to a track day where they brought some new cars I asked and they said they just make sure they get a few hundred miles an the cars before track events. One interesting thing a dealer told me was that they have seen cars that had terminal engine damage due to the owners changing the oil too early and too frequently. I guess they need a little bit of grit in the oil to properly seat the piston rings. I’ll probably just stick to what the owners manual says.....

911boy

+1. BMW and Porsche(i think) race car engines need to re broken in or ANY warranty is void. PEC Atlanta puts a few hours on every car before they use them for experiences.