Motor Oil Info

In order to pass the requirements of MERCON V, automatic transmission fluids must not exceed a 25 percent viscosity increase following 300 hours of testing. AMSOIL Synthetic Automatic Transmission Fluid easily passed the 300-hour ABOT test, exhibiting no viscosity increase. The test was allowed to continue for 1,106 hours, over three times the standard test length. Even after 1,106 hours, AMSOIL Synthetic Automatic Transmission Fuild exhibited a minimal 6.45 percent viscosity increase, still easily passing MERCON V requirement for 300 hours.

Texaco Havoline Automatic Transmission Fluid did not fare as well. Although it passed the 300-hour test requirement with a 10.66 percent viscosity increase, viscosity increased significantly as the test was allowed to continue. It exceeded the 25 percent viscosity increase mark after 500 hours, then soared to a 3,539.04 percent viscosity increase after 1,012 hours.