Chevron’s Delo brand has expanded to include Delo Synthetic Gear ... 75W-90. The new product, said to offer outstanding thermal and oxidation stability and meet all OEM warranty requirements, is ...

While old-timers may rely on the old standard SAE 90 weight gear oil, newer multi-weight oils, such as Amsoil’s 75W-140 synthetic, maintain their viscosity at temperatures from -31 degrees to ...