Manual trans fluid?

[golfdave]

Quote from my how to guide:-
Guide here:-
https://www.golfmk7.com/forums/inde...250-5-speed-or-6-speed-manual-gearbox.348763/

QUOTE:-
All of these oils meet the recommendations of the G 052 512 A2, & G 052 527 A2 standards. I used Fuchs Titan Sintofluid FE SAE 75w, as it was easier for me to get hold of.

Fuchs Titan Sintofluid FE SAE 75w:-
Density at 15°C (DIN 51757) = 0,873g/ml
Kinematic viscosity at 40°C (DIN 51562-1) = 40.8mm²/s
Kinematic viscosity at 100°C (DIN 51562-1) = 6.7mm²/s
Viscosity index (DIN ISO 2909) = 119
Flash point, CoC (DIN ISO 2592) = 221°C
Pour point (DIN ISO 3016) = -44°C

ROWE Hightec Topgear FE SAE 75w80 S:-
Density at 15°C (ASTM D-7042) = 0,854g/ml
Kinematic viscosity at 40°C (ASTM D-7042) = 37.8mm²/s
Kinematic viscosity at 100°C (ASTM D-7042) = 7.5mm²/s
Viscosity index (ASTM D-7042) = 173
Flash point (ASTM D-92 / DIN EN ISO 2592) = 180°C
Pour point (ASTM D-97 / DIN EN ISO 3016) = -44°C

Febi Bilstein Gear Oil SAE 75w (GL-4):-
Density at 15°C (DIN 51757) = 0,87g/ml
Kinematic viscosity at 40°C (DIN 51562-1) = 40.8mm²/s
Kinematic viscosity at 100°C (DIN 51562-1) = ??
Viscosity index (DIN ISO 2909) = ??
Flash point, CoC (DIN ISO 2592) = 221°C
Pour point (DIN ISO 3016) = ??

Millers Oils XF Premium MTF 75w:-
Density at 15°C = 0,847g/ml
Kinematic viscosity at 40°C = ??
Kinematic viscosity at 100°C = 6.1cSt
Viscosity index = ??
Flash point, CoC = >200°C
Pour point = ??

Mobil 75w Multi-Vehicle MTF 75w:-
Density at 20°C = 0,848g/ml
Kinematic viscosity at 40°C = 37cSt
Kinematic viscosity at 100°C = 6.9cSt
Viscosity index = ??
Flash point, CoC = ??
Pour point (DIN ISO 3016) = -39°C

Comma MV MFT Plus 75w Fully Synthetic MFT (rebranded Mobil oil):-
Density at 20°C = 0,848g/ml
Kinematic viscosity at 40°C = 37cSt
Kinematic viscosity at 100°C = 6.9cSt
Viscosity index = ??
Flash point, CoC = ??
Pour point = -39°C

Castrol Transmax Manual V 75w80:-
Density at 15°C (DIN ISO12185) = 0,860g/ml
Kinematic viscosity at 40°C (ASTAM D445) = 40mm²/s
Kinematic viscosity at 100°C (ASTAM D445) = 8.1mm²/s
Viscosity index (DIN ISO 2909) = 151
Flash point, CoC (DIN ISO 2592) = 220
Pour point (DIN ISO 3016) = -60°C

What is very strange is that the Fuchs 75w80 does not meet either of the two standards required for our gearboxes & yet the ROWE is a 75w80 & does meet both standards!

So DO NOT go by the “W” rating, only go by the “recommendations” list on the oil bottle!!

List of other VW oil specs:-

https://www.oilspecifications.org/volkswagen.php

Edit October 2022:-

I am currently using this oil:-
Millers Oils Motorsport CRX 75w NT+
This is a fixed 75w to API GL-4 with their "Nanodrive" ester technology. It has NOT been sent to VAG for approval, as they don't do this for their motorsport oils, so "use at your own risk" is the legal answer! However, it has similar characteristics to their "normal" Millers Oils XF Premium MTF 75w which is approved to the VW specs 052 512 A2, & G 052 527 A2.

Initial observations:-

1. The car is even quieter, with less transmission noise generally, & especially under heavy acceleration in 3rd & 4th gears (when overtaking).
2. The car freewheels more when you come off the accelerator. In fact on a flat straight at 60mph there is little initial difference when you come off the accelerator & have the clutch depressed or not!
3. The gears slide in better. When moving from 2nd to 3rd or 4th to 5th, you would have to fully push the gearstick forwards into the higher gear from neutral. Now once the gearstick is out of the lower gear, across neutral & just edges into the higher gear…..it just drops straight in!