i used schumacher for years but always found it coming out dirty dark colour with any shocks i used it with..went to "ultimate" oils and felt a massive difference, more consistant. It always comes out clear..but i seem to be 5-10wt more then the other guys i pit with, they use losi,schm,ae etc. Or i always feel the car needs to be stiffer. either way...go with what you know.
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