Forge fluids have a default viscosity 1000. Create's honey and chocolate have their viscosity set to 500, which I find quite counter-intuitive: honey and chocolate are evidently more viscous than water.

I know this property is not used by Forge in any meaningful way. But some other fluid-related mod might actually make use of this property. Since it is explicitly set by Create, I suppose we should have a reasonable value here.

P.S. Just for reference, Tinker's Construct have viscosity of slime fluids (which I suppose are comparably to honey when it comes to viscosity) set to 1400~1900, and all hot fluids (e.g. molten metal) to 10000.