Dominique Cormann wrote:

> <snip>
> http://www.amsoil.com/products/agr.html
> Product code AGT
> " AMSOIL 80W-90 GL-4 Gear Lube is recommended for marine outboard and
> stern drive lower unit gears and bearings. It is also recommended where
> the manufacturer specifies GL-4 performance. AMSOIL 80W-90 GL-4 Gear
> Lube is not recommended as a replacement for API GL-5 products. "
>
> The nice thing about the MTL is it is the viscousity that VW recommends
> for that transmission.

You must mean MT-90 which is GL-4. MTL is GL-5, I think.

Page 34.1a of the Bentley Manual specifies that, from 1/86 onward, the 091 transmission
should use GL-4, SAE 80W or 80W/90 gear oil.

> However if I was in a warm climate the 80w90 would probably be fine too. The MTL is a
> 75w80 which is what VW recommends.
> In cold climates I find it works slightly better (75w80 vs 80w90)

I live in Ontario, Canada where is can get cold from time to time. The AMSOIL "AGT"
100% Synthetic 80W/90 GL-4 gear oil works well in our '86 Syncro Westfalia. I plan on
using in our '86 Syncro Double Cab as well.

I take it back, AMSOIL is every bit as good as Redline. If it weren't, I'd be using
Redline instead.
Larry