Viscosity is the most important indicator of an oil

It is fundamental to maintaining the integrity of a lube oil film, in preventing metallic contact, scuffing, microwelding and wear of sliding surfaces.

The CMT Viscotube uses a falling ball technique to measure the viscosity of oil in centistokes. The tube is inverted and the time the ball needs to fall down will be manually measured. With the time, ball size and temperature of the oil when measured the viscosity can be calculated. 

The CMT Viscotube comes supplied in a case with multiple balls for increased accuracy, a digital thermometer and a stop watch.

The CMT Viscosity Oil Test Kit gives a simple go / no-go result for viscosity. Typically it will detect 5-10% distillate fuel dilution of an SAE 30 to 40 engine oil as well as increases in viscosity due to oil contamination. It can not be used to get an actual viscosity but you will get an idea whether the viscosity is greater or smaller than the compared oil viscosity. It is essential that both oil measured do have the same temperature.