This oil pressure gauge is engineered to provide extremely accurate readings under harsh conditions and measures the pressure of oil circulating through the engine. This oil pressure gauge has a 270° sweep, 0-100 PSI range, and has a backlit dial face. This gauge is easy to hook-up and mount in your car and gives an advanced warning of incorrect oil pressure, low oil level, defective oil pump, restricted oil lines, clogged oil filter, and low oil level.