  We study the Effective Field Theory of Large Scale Structure for cosmic
density and momentum fields. We show that the finite part of the two-loop
calculation and its counterterms introduce an apparent scale dependence for the
leading order parameter $c_\text{s}^2$ of the EFT starting at k=0.1 h/Mpc.
These terms limit the range over which one can trust the one-loop EFT
calculation at the 1 % level to k<0.1 h/Mpc at redshift z=0. We construct a
well motivated one parameter ansatz to fix the relative size of the one- and
two-loop counterterms using their high-k sensitivity. Although this one
parameter model is a very restrictive choice for the counterterms, it explains
the apparent scale dependence of $c_\text{s}^2$ seen in simulations. It is also
able to capture the scale dependence of the density power spectrum up to
k$\approx$ 0.3 h/Mpc at the 1 % level at redshift $z=0$. Considering a simple
scheme for the resummation of large scale motions, we find that the two loop
calculation reduces the need for this IR-resummation at k<0.2 h/Mpc. Finally,
we extend our calculation to momentum statistics and show that the same one
parameter model can also describe density-momentum and momentum-momentum
statistics.
