[s-cars] Red Line transmission oil

[Igor Kessel]

Folks,
I am confused. The Red Line site states:
"Red Line Oil's MTL and MT-90 are designed to provide excellent 
protection and improved shiftability for manual transmissions and 
transaxles, having cured the problem of hard shifting in thousands of 
transmissions with shifting troubles. How? They have the appropriate 
coefficient of friction for most manual transmission synchronizers (many 
gear oils, engine oils, and ATFs are too slippery for proper synchro 
engagement). And, the wide viscosity of MTL and MT-90 allow proper 
shifting over the entire temperature range which the transmission will 
experience. The synthetic base oils used have a very high viscosity 
index which provides relatively constant viscosity as temperature 
changes. MTL is a low 70W at very low temperatures and a high 80W, 
nearly an 85W, at elevated temperatures, providing adequate viscosity to 
prevent wear and deaden gear noise. MT-90 is a thicker 75W90 version of 
MTL. The shear stability and oxidation stability of these products are 
excellent, thus the physical characteristics of Red Line MTL and MT-90 
will change little with use. "

I think I had used MT90 in my 200TQ in the past. A few days ago I 
stopped by Zygmund Motors in Doylestown and to picked up some  MTL SAE 
70W80 API GL-4.

OTOH ETKA calls for 75W90.

Should I return it and get the MTL instead?
Also, should I get the "special additive BG116 BG E.P.C." from the 
dealer or is it not really necessary?

-- 
Igor Kessel
two turbo quattros