[phx08]

I say follow what the engineers have said in the manual. Why go against something that was recommended by the designers of the product?

[itwasepic]

Originally Posted by phx08

I say follow what the engineers have said in the manual. Why go against something that was recommended by the designers of the product?

I share the same view. If BMW formally puts it in writing (i.e., owner's manual) and I follow it, then I minimize any sort of credible dispute against me if I have a warranty claim that can be tied to the break-in period.

[nicknaz]

Originally Posted by Steve33

It's a controversial topic, some say follow the manual, some say follow the method below.

First:
The first 20-40 miles (depending on the source) are the most important to run the engine more on the higher rpm side to get the piston rings to seat properly (note high RPM, not high speed). This will help the seals to seat the best, get the most power, keep high compression, increased longevity, etc.

My 335 had 12 miles when I picked it up off the lot, so I'm sure the techs who set up the car for delivery and any potential buyers who test drove it have already helped me break in the motor per this advice

[v1k1ng01]

Originally Posted by Roki_014

I went 143 mph withn an hour of picking it up at the welt

It handles good at 155mph to!