I run 7.5'ish (a mixture of 10 and 5) in the front of my Mugen and 5k in the rear. As more of a basher style driver I find this perfect for me. I live by the go into the corner hard and use power to pull me around it method of getting around the track.

If I were a clean line style driver I would go a little lighter, 5-7k front and 3k rear. your driving style will be a determining factor in what oil you want. We all (you, me, and hoov) need to finda common sunday to hit up traktopia ! and one of these sundays you will have to drive down to the yamato track.