I'm running 3hole with 600wt Tamiya oil. I have been running the 400 with 2hole before. But last week the car felt real good with the 600wt. Only problem was it rained before I had a chance to get a qualifier in to get some real lap times. So we went indoors onto the carpet. Had to whip out the Yok SD for that and put up the 415. This weekend looks to be Sunny! I'd also like to try AE 30wt with the 3 hole pistons as well. Plus I'm running Tamiya White Springs up front with Blues in the rear. Anyways.. we shall see.