Fluid spec is "SHELL DONAX YB DOT4
ESL FLUID", which is not standard DOT4. I would not use DOT4, although it may work ok, but that's just me.
AFAICT that spec is for a low-viscosity DOT4 fluid. What appears to be a reasonable explanation is at
this thread.
"I looked up the specs for this ESL thing. As per Shell, ESL stands for (Extended System Life), but really it is a lower viscosity fluid. Here is Shell’s description of the product :
A high performance, low viscosity brake and clutch fluid with superior materials compatibility ideal for ABS, electronic stability and traction control systems – suitable for OEM applications.
In fact, the viscosity is half of the Super Dot 4! Roughly 700 [max 750] vs. 1440 mm2/s [max 1800 mm2/s]. (Kinematic Viscosity at -40C (mm2/s) to be more technical.)"