cheap it isn't but people go up to 100k on the stuff.

http://www.redlineoil.com/dealers.htm

That has a list of people you can call to find it.

My tranny shifts a bit smoother with the stuff.

They also have a high shock formula if you are putting down some nice numbers and do some crazy stress to your drivetrain.

That high shock stuff though is like glue LOL

Sam