<VV> My final gear oil note - can't speak for others!

[Joel McGregor]

I've been running Sta-Lube GL5 in my Corvairs for over 20 years since I didn't know any better and they have been working fine.  Not saying it's the best or that it hasn't caused more wear that it should...

-----Original Message-----
From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On Behalf Of Sethracer--- via VirtualVairs
Subject: <VV> My final gear oil note - can't speak for others!
But, seriously, Randy - Amsoil lists their own GL4 lube. Here are their listed "benefits": (Note #3)
 
Promotes Longevity in Front-Wheel-Drive  Transaxles Synthetic Manual Transmission Gear Lube meets 75W/80W-90  viscosity requirements and exceeds API GL-4 performance requirements for many front-wheel-drive vehicles. Its excellent gear protection, extreme-temperature performance and durability promote maximum longevity and reduced maintenance  costs.
 
    *   Protects against increased heat and pressure 
    *   Outstanding cold-flow properties 
    *   Protects brass synchronizers 
    *   Friction-modified 
    *   Excellent seal compatibility 
    *   Inhibits rust and corrosion 
    *   Long service life


But if you read their recommendations for their GL5 spec gear oil, Their product name: 75W-90 Long Life Synthetic Gear Lube,  it only recommends it for axles if GL4 was the  original spec.
 
"Use AMSOIL Long Life Synthetic Gear Lube in differentials, manual transmissions or other gear applications where one or more of the following standards are specified: API GL-5 & MT-1, MIL-PRF-2105E, Dana SHAES 234  (Formerly Eaton PS-037) for 250,000 miles, Dana SHAES 256 (Formerly Eaton  PS-163) for 500,000 miles, Dana SHAES 429A, Mack GO-J & GO-J+, Meritor 0-76N  (75W-90) & 0-80 (80W-140) plus hypoid gear oil specifications from ZF TE-ML  07A and
08 foreign and domestic manufacturers such as GM, Ford and Daimler Chrysler. It can also be used in rear axles where API Service GL-4  lubricant is recommended."
 
I added the bold above. So, if you wish to run Amsoil, why  not run their
GL4 product? It is what AMSOIL recommends. -  Seth