Quote:
Originally Posted by DMS Racing
Losi - because it is colour coded, used on LOTS of set up sheets by top drivers, a large range from 10wt to 100wt, and the bottles are conveniently numbered on top for easy indentifacation in the pit box too 
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Ditto and the 2.5 aspects too

aka 30 32.5 35 37.5 etc