mabar proclaimed:

> Anyone have any opinions on this website, which says to run your brand new
> vehicle HARD for the first 20 or so miles to better seat the rings. This
> contradicts the "drive it gently" for the first 500 miles that most owner's
> manuals recommend.
>
> http://www.mototuneusa.com/break_in_secrets.htm
>
> I think I am leaning toward trying this "run it hard for the first 20 miles"
> theory on my next new Jeep.

This was folklore long before Tim Berners-Lee had his "aha!" moment.
If you wanted a sports car engine that would run with lower internal
friction, you were supposed to run the thing to the redline on
every full throttle shift--repeatedly.

 

mabar proclaimed:

> Anyone have any opinions on this website, which says to run your brand new
> vehicle HARD for the first 20 or so miles to better seat the rings. This
> contradicts the "drive it gently" for the first 500 miles that most owner's
> manuals recommend.
>
> http://www.mototuneusa.com/break_in_secrets.htm
>
> I think I am leaning toward trying this "run it hard for the first 20 miles"
> theory on my next new Jeep.

This was folklore long before Tim Berners-Lee had his "aha!" moment.
If you wanted a sports car engine that would run with lower internal
friction, you were supposed to run the thing to the redline on
every full throttle shift--repeatedly.

 

mabar proclaimed:

> Anyone have any opinions on this website, which says to run your brand new
> vehicle HARD for the first 20 or so miles to better seat the rings. This
> contradicts the "drive it gently" for the first 500 miles that most owner's
> manuals recommend.
>
> http://www.mototuneusa.com/break_in_secrets.htm
>
> I think I am leaning toward trying this "run it hard for the first 20 miles"
> theory on my next new Jeep.

This was folklore long before Tim Berners-Lee had his "aha!" moment.
If you wanted a sports car engine that would run with lower internal
friction, you were supposed to run the thing to the redline on
every full throttle shift--repeatedly.