Seriously, what is this all about? This person has asked nice questions, & each time I have tried to answer them. I've read a zillion posts on this topic, and my conclusion is that Redline MTL may be the best option for manual users to consider. Since it's relatively thin and a Mirage shifts well in cold weather already, I see no reason for going thinner.
From research I have done in the past - Ravenol J1C1002 SAE 75W-80 Manual Transmission Fluid - MTF-2 Full Synthetic API GL-4 (1 Liter) is another excellent product, but it is more expensive than the Redline MTL. The Ravenol product is sold in liters vs. quarts, which is a little less product/bottle, too. 1 quart = 0.946353 liters.
https://www.amazon.com/Ravenol-J1C10.../dp/B00FGXB15O
I realize Eggman's posts & opinions are way more important than mine apparently, but I hope that what I have shared is helpful to this person & others just the same.