How it should be done: Breaking in a new 1970 Porsche 911T

My owner's manual also has USA on the cover.

Last night I had occasion to look at my 1971 Porsche 911T Owner's Manual, material that came with my car more than 20 years ago. I was really struck by the direction given to the owner when breaking in a new Porsche 911.  Far more specific and rigorous than I ever imagined. It would be interesting to compare these directions with that, say, of a Ferrari of the same vintage. Here it is, from page 11:

Break-In Rules

Continued excellence of performance and economy depend to a great degree upon the treatment and handling during the first 600 miles of operation. It cannot be per-emphasized that not only the engine will benefit from proper break-in, but the car as a whole. During this crucial period, the car must not be driven at full power over extended distances, not should it be driven too slow (with the exception of first gear, do not drive at less than 1500 rpm if at all possible.). The general rules are as follows:

1. Maximum engine speed during th first 600 miles must not be in excess of 5000 rpm.

2. Increase the maximum applied engine speed by 500 rpm between odometer readings of 600 and 1000 miles, meaning not to exceed 5500 rpm. Drive brisqly [sic], change speeds frequently, use full throttle for short spurts only.

3. Increase maximum engine rpm to 6000 between dimeter readings of 1000-1200 miles.

4. Bear in mind never to lug the engine with heavy throttle at low engine speeds, a rule which applies not only during break-in but at all times.

5. Upon reaching the odometer reading of 1200 miles, you can subject the car to full throttle operation.


I never drive my car that hard, but perhaps I should!