Oil change intervals even today are determined empirically and oil changes are realized without taking into consideration the real quality of the lubricant. This causes unnecessary costs. If an oil change is realized too early, a still flawless lubricant is thrown away; if an oil change is realized too late, machine damages can occur. The ideal case would be to realize oil changes depending on the condition. The highest reliability is provided by a laboratory analysis realized with a correctly taken oil sample. With the KLEENOIL oil analysis equipment oil contamination or changes in the oil condition can be determined on site, before and during operation. For this purpose we offer various equipment or oil analysis sensors.