When I used to calibrate viscometers we used a different oil for the higher viscosities, silicone is the best for temperature stability, but does shear thin. I can't however remember the other type of oil! I do know it was a bugger to clean off though.
I'd suggest trying some high viscosity 8th silicone diff fluids first - not 100% sure where to start though, I have hydra fluid at home so may be able to try and match it up by eye to my 8th oils?
IF you think the drive is changing during the run, then the silicone oil is probably shear thinning. However, thinking about it, another type of oil would probably be more affected by the temperature from the slipper part...
mmmmmmm
Perhaps the Schumacher one was better as it could use lower viscosity silicone oil, that wouldn't be as prone to shear thinning.....
I'm sort of thinking out loud here!
G
10-02-2010
Team Losi Racing
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