I run 35wt oil all round, don't think it matters too much what sort, mine is a mixture of Associated, Losi and Schumacher depending on what was available at the time. Springs are either Associated blues (front) and silver (rear) or Tamiya whites (no paint dots) on both ends. No noticeable problems with slap running a Trakpower 4900 lipo. To some degree it depends how severe your jumps are I guess.
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