It is extremely essential to hold monitor of all oil additional to the compressor and cylinder lubrication techniques and evaluating it with all oil drained from the coalescing filters and the ASME stress vessels. The big difference in the two (oil in and oil drained out) is an indication of possible oil carryover into the autos getting fueled from the fueling station. This brings about car functionality problems and for that reason dissatisfied clients. For far more info on oil carryover, see our CNG Fueling Stations CNG Fueling Stations CNG Fueling Stations