I'm using their 75w90 synthetic gear oil in my 5-speed, and this morning, after sitting out in the cold all night, it was shifting like nothing was wrong. Didn't have to warm it up or anything. It was incredible.

Haven't tried Redline MT-90, but I have a feeling I won't really have to for the forseeable future (unless someone charitable feels like funding my next tranny flush )

 

I am going to have to agree and i have been meaning to post this myself. I have used Redline MT90 and The Amsoil gear oil and I can tell the amsoil is superior. The other morning it was 9 degrees and the tranny shifted like butter. I have a B&M short shifter as well. I can't wait to try their motor oil.
A+ for ED

 

And I'll be the third to chime in. I could not be happier with all of the Amsoil products I have tried. I would really like to get their bypass filter though!!!!

 

There are two kinds of GL-4 from Amsoil on the market right now, the new and the old one. How can I tell the difference?

 

Both GL-4 products are new, but you should be using AMSOIL Manual Transmission & Transaxle Gear Oil, product code MTG. The other GL-4 product is a reformulated marine gear oil and this formulation is not recommended for automotive applications.

See my ad in the Group Deals section for discounted pricing.

 

Good guy to deal with, that talkinghorse guy.

 

yup Amsoil gets my vote.