Product Review

Synthetic D6 Automatic Transmission Fluid is a lower viscosity version of the D4 Automatic Transmission Fluid and is designed for better fuel efficiency in CAFE testing. Dexron VI requires a different approach to a conventional Automatic Transmission Fluid formulation. Rather than beginning with a 7.5 cSt fluid and allowing a viscosity loss in use to drop to 5.5 cSt, the Dexron VI fluid requires a starting viscosity of less than 6.4 and a final drop to no less than 5.5 cSt. Red Line D6 will drop to no less than 6.1 cSt. Since the final viscosity after use of these fluids are similar, Dexron VI fluids can be used where Dexron III fluids were previously recommended (with the exception of some manual transmission applications, our customers report). D6 Automatic Transmission Fluid also provides significantly improved gear protection and will provide a GL-4 level of gear protection. The balanced frictional characteristics provide smooth and consistent shifts for extended drain intervals. The superior stability compared to petroleum Automatic Transmission Fluids allows high-temperature operation without varnishing valves and clutches which leads to transmission failure.