I have found that 30% caster works well for me 8 - 10 percent oil. and 30% of oil is caster. I have found that the first press thick caster works really well and is cheap, I used degummed before. If you running shorter tracks go with 20% caster, its still safe, longer tracks you can up the caster 30%. If your motor is a little on the old side you can further up the caster content to increase compression 40% to 50% off total oil is caster. How do you find AAC motors?
All the best mate!
RX8 - Savox - Reds Racing - Ko - Contact - Enneti