[SpEEdyBL]

Excuse my ignorance. I was just going by what the surface looked like in the picture. It looked a little rough compared to asphault, though could have been the lighting. Anyway back to the subject.

In the center diff, I use 10k weight, but that is all I have tried other than a nearly empty center diff. 10k is a little too light for the big heavy autocross tires as the front tires seem to over spin under heavy accel, but its just fine for the other tires. Sorry I can't really comment as I haven't experiemented with diff oils.