So how many stars are there in the Universe? It is easy to ask this question, but difficult for scientists to give a fair answer! Stars are not scattered randomly through space, they are gathered together into vast groups known as galaxies. The Sun belongs to a galaxy called the Milky Way.
Reverse osmosis. Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water.
A quality oil filter has a metal interior with holes to allow the oil to flow through it. This metal cyclinder supports the paper filter element. The eco design uses a plastic grid with large openings. This does not fully support the filter and allows pieces of the filer element to pass into the engine.