Not timely replacement of oil and broken oil will reduce the lubrication, reduce the sealing effect, reduce the cooling effect, and reduce the cleaning effect. At this time, the oil detection instrument is very important. Characteristics: Mini portable, no need to take out the oil, accurate measurement, prolong the life of your car. One-button boot detection, higher accuracy. LED display can accurately display the results, clearer readings. Use the optical principle to check the condition of your engine oil and get the latest status of your oil anytime, anywhere. With the optical probe, you don't need to take the oil out, just put the probe into the oil dipstick to get the test results. Technical data: Material: ABS Yellow color Probe diameter: 5.3 mm Oil hole requirements: diameter 6mm, curvature 30 Hose Length: 800mm / 31.5in Detection type: turbine oil Overall height: 170mm / 6.7in Package Size: 250 * 210 * 60mm / 9.8 * 8.3 * 2.4in Package Weight: 405g / 0.9lb 1. Do not check if the engine temperature is higher than 60. Check the thermometer on the instrument panel. The test must be below 60. 2. Before testing, check that the probe is clean, and make sure that oil flooded the probe during the test. 3. New engine oil shows 100.0%, normal range is 30%100%. If the oil test result is less than 30.0%, the detector will alarm to change the oil. Package list: 1 * Engine Oil Tester 1 * Brush