[IowaSmart451]

Synthetic GL-4

Amazon.com: Ultra1Plus SAE 75W-90 Synthetic Gear Oil, API GL-4 (3 Pack QT) : Automotive

Buy Ultra1Plus SAE 75W-90 Synthetic Gear Oil, API GL-4 (3 Pack QT): Gear Oils - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

 

[IowaSmart451]

Mobil 1 Delvac 50
90 weight gear oil

Mobil Delvac 1™ Transmission Fluid 50 | Mobil Delvac™ Transmission Fluids

Learn how Mobil Delvac 1™ Transmission Fluid 50, a full synthetic, manual transmission fluid, was designed to provide maximum engine protection.

www.mobil.com

Why would you use a straight viscosity gear oil? SAE 50 is about the same as 90, but the 75w is equivalent to SAE 15 when cold.