New Engine Break In Process

[landrovered]

Interesting thing I was told at the Porsche dealership was they recommend not using the cruise control for the first several thousand miles. They want the engines to change revs. They said you can pretty much do anything else other than that one thing.

[Cloudsurfer]

There are two general theories on engine break-in: drive it like you stole it, or baby it. Most race teams go with the former, and there is evidence to support the notion that this will yield a higher power producing engine. The piston aviation industry has probably the most drawn out engine break in procedures, which consist of ever higher engine loading and RPMs over multiple heat cycles. Either way, you do not want to maintain constant RPM for any length of time (hence why not to use the cruise control), and using engine braking also actually helps to seat the rings.

The concerns are twofold: you want to ensure that you get proper ring seating, but you also don't want to cause higher than needed wear. With modern manufacturing techniques, in all likelihood, any new engine is broken-in in within 50 miles no matter how you do it.

Since you are under warranty on the new motor, I would stick with a synthetic oil, both because Porsche says so, and two that you don't need a non-syn break-in oil on this engine. I would, however, change the oil after a few hundred miles, and I would not use Mobil 1 or any 0W40.

[23109VC]

i had an engine rebuilt on a car years ago and the mechanic who built it / instaleld it told me to drive it just like I would normally drive it. he didn't want me to try and abuse it, but encouraged me to drive it hard. his only suggestion was to not leave it at the same speed/rpm fro a long period time...he wanted the engine to be moving throughout the revs and not sit at one speed .... kind of like wha thtey told you - avoid cruise.. dont take a 6 hour road trip and sit at 3000 rpm all day..

you are lucky you had it happen "soon" enough that the dealer paid.. they paid for the whole thing?

[mts]

Originally Posted by 23109VC

you are lucky you had it happen "soon" enough that the dealer paid.. they paid for the whole thing?

Porsche paid for 100% of the parts. I paid the labor.