Right after taking delivery of my G, I drove from LA to Vegas, then back to LA, then to San Francisco. Now I've read in this forum that I was not supposed to keep my speed steady for the first 1000 miles. Although I did not use the cruise control, I probably kept the speed between 70 and 85 for up to hour and a half at time. My question is: Why is it bad to keep my speed steady for the break in period?

 

By varying your speed, the rings and valves get exposed
to different movement. This variation allows for a better
breakin and more HP after breakin. Please correct my
non-technical explanation if needed, anyone?


2003 Twilight Blue 5AT Sedan, sunroof,
Graphite Leather, splashguards,
12 wire Grounding kit, 350Z duct, Stillen CAI
Underbody rear diffusers, Drilled aluminum pedals
HKS rear section exhaust

 

Ah, you won't gain horsepower, but as far as i know its to protect the engine.

2004 Sedan
Black/Willow
Premium w/ splash guards
Clear Corners, Z-tube

 

With the break in for the engine, is it really necessary? I know it has been discussed in length before, but out of curiosity, are race engines say in Formula 1 broken in before the race (now the weekend)? From the sounds of it, they use the engine straight out of the factory.

 

True, but they also use another new engine for the next week's race, so longevity isn't a concern.

There are other parts besides just the engine.. transmission, brakes, other drivetrain parts, that require break-in, so that they will last.