The lattice gas simulations tend to be very noisy. This is overcome, to some extent, by averaging the density and velocity over a cell, typically containing at least 16 by 16 sites. The results of such averaging are still significantly noisy and frequently much larger cells are used and ensemble averaging is also employed. The cellular automaton structure of the lattice gas model makes it suitable for parallel computer implementation. If, however, a significant amount of averaging is required before acceptable results are obtained this can more than outweigh any advantages the model has when computer resources are considered. For example consider a simulation which requires cell averaging in 32 by 32 cells and ensemble averaging over 10 simulations. This evolves using a grid with 1024 times larger than the resolution required and running the same simulation, with different random seeds, 10 times. This is clearly wasteful of computer resources.