Frequently asked questions

As temperatures drop, the same cold temperature viscosity phenomenon occurs with drivetrain lubricants as it does with engine oils. Following the engine warmup procedures mentioned above will also allow for sufficient oil circulation to your drivetrain components. For general-service transmissions used in on-highway Class 8 vehicles where ambient temperatures of -15 degrees Fahrenheit or below exist, a heat exchanger is recommended to make warm-up times faster. Fully synthetic SAE 50 transmission and SAE 75W-90 gear oil lubricants, such as Mobil Delvac 1™ Transmission Fluid 50 and Mobil Delvac 1™ Gear Oil 75W-90, will provide better low-temperature fluidity than conventional oils, as well as help reduce wear, leading to longer equipment life and allowing for easier gear shifting while operating cold.