[Rufton]

I would consider mineral oil for mild performance applications if entire system is brand new. Dot 3 exposed seals will be damaged by mineral oil. Not fond of Dot 5 because condensed H2O can pool and cause corrosion and performance issues. I use Dot 3 and change fluid every few years to avoid corrosion. Fresh Dot 3 has corrosion inhibitors. Dot 3 can damage paint. Quickly remove Dot 3 from paint w/ H20 or dish soap + H2O. Dot 5 can cause fish eyes when repainting. Not easy to completely flush system before changing to incompatible fluid.