Isn't 10K essentially "locking" it? My experience is only from 1/8 scale (Losi 8ight), so I hope the assumptions are still the same (ie; thicker oil = less cornering traction but less wheelspin whereas thinner oil = more cornering traction)

I'll do the same, I have 1K,2K and 10K oils that I use fort he 8ight. The track I run on is indoor clay, medium traction.