Audi_in_Van

Ok, as far as I've searched, the only aftermarket Transmission oil that's recommended is Motul 300. Now, from the following specs that I've gathered through search, WHY would anyone consider Motul an upgrade (apart from cost)?

I am trying to find an oil that is better for tracking and Motul don't look to be better at least based on the specs, unless I am not seeing something?

<b>Motul Gear 300:</B>
Viscosity grade SAE J306 75W-90
Density at 15°C (59°F) ASTM D1298 0.900
Viscosity at 40°C (104°F) ASTM D445 72.6 mm²/s
Viscosity at 100°C (212°F) ASTM D445 15.2 mm²/s
Viscosity index VIE ASTM D2270 222
Flash point ASTM D92 200°C / 392°F
Pour point ASTM D97 -60°C / -76°F


<b>OEM:</B>
SAE 75w90
API GL-4/5
VW 501.50

Density at 15?C (59?F) 0.864
Viscosity at 40?C (104?F) 76.0
Viscosity at 100?C (212?F) 14.0
Viscosity index VIE 200
Flash point 224C
Pour point -51C

sj6sp

I really don't know them myself but there was discussion that OEM fluid for S4s is a slightly lighter weight (70w-80).

FWIW, I run Motul 300. Cold weather shifting is troublesome with this stuff until you get it warmed up. I'm thinking of going back to OEM fluid.

The_Jerbel (Jordan)

Why not consider Redline MTL or MT90?

Audi_in_Van

<ul><li><a href="https://forums.audiworld.com/s4/msgs/2180229.phtml">https://forums.audiworld.com/s4/msgs/2180229.phtml</a</li></ul>

Audi_in_Van

cause they are not meant for our cars, we need GL4/5...

The_Jerbel (Jordan)

Both MTL and MT90 are GL4...they certainly are meant for our cars.

Audi_in_Van

just search forums, don't have time to explain things... we need GL4/5, or GL4+ as some call it

The_Jerbel (Jordan)

that use Redline. I've never heard of a single problem. My tranny shifts (well, it did before I ruined the 1-2 shift collar) like butter with MTL.

nadrealista

you just used MTL or MT90 MTL mix?

jettatoS4 (Chad)

How are you defining good? You want higher viscosity at higher temps to prevent wear or lower viscosity to reduce drag?