A process for producing an API Group I base oil, comprising: blending a lower quality base oil that does not meet API Group I specifications with a Fischer-Tropsch derived distillate fraction having defined pour point, viscosity index and Oxidator B, and isolating an API Group I base oil that has improved defined properties. In the unlocked mode, the laser unit is configured to provide at least one of a level line or a plumb line when the pendulum assembly is free to settle to a point of equilibrium. The encoder performs adaptive filtering of at least one reference picture to respectively obtain at least one filtered reference picture, and predictively codes the at least one picture using the at least one filtered reference picture. The upper end further comprises a spring-loaded mechanism to allow the hooks to ride up and down the pole, thus allowing them to engage trash containers of different sizes, especially those of large wheeled totes. The present invention is more specifically directed to a bioassay system incorporating the materials listed above. An output portion outputs the corrected tightening torque measurement value.