I have a Losi LST2 with partly exposed CVD's (no boots, can't fit them) and since I run in dry, dusty condition, or any conditions for that matter, they collect a lot of gunk because of the light oiling I've given them. Obviously oil is good but would I be better off running them dry? Basically, should they be an oily, mud pie or dry with minimal dust/dirt build up? Which method causes the least wear? Opinions? Tom.