Nowhere does this say that this oil is a 75W – 80 GL-4. That’s what my car requires.
Help me find a good manual transmission oil
- Thread starter Maxfli81
- Start date
Seems to be in the same class as Honda MTF2
A.These MTL fluids are closest to a Kinematic Viscosity of 6.X cSt@100C (About the same viscosity as Dexron VI ATF) and SAE 70 or so:
1. Castrol Syntrans FE 75W,
2. BMW (Pentosin) MTF-LT-3,
3. Honda MTII or MTF 2.
4. Ford FML-XT-11-QDC
5. Volvo Manual Transmission Fluid (6.4 cSt) [Recommended for: type M655-speed with 6-cyl. engine, M66, MTX75 and MMT6 and of the type M56, M58 and M59 from and including model year 1996. Meets Ford specification WSSM2C200-D2]
7. Redline MT-LV SAE Viscosity Grade 70W/75W Vis 6.5cst@100°C
JHZR2
Staff member
Use a viscosity chart:
Viscosity Charts - Bob is the Oil Guy
Viscosities can be related horizontally only Viscosities based on 96 VI single grade oils. ISO are specified at 40°C AGMA are specified at 40°C SAE 75w, 80w, 85, 5w, & 10w specified at low temperature. Equivalent viscosities for 100° & 210°F are shown SAE 90 to 250 and 20 to 50 specified at...
bobistheoilguy.com
10.8cSt at 100 is on the cusp of an 80-85 wt gear oil. So the synchromesh product should be about right.
We ran this in our VW Rabbit with great success. I have some posts from probably 2010 on here about it.
GL-4 verified it is yellow metal safe. Any MTL sold as such will be unless stated otherwise. Amsoil specifically states that it is.
Well, what others are saying is don't get hung up too much on that and peek under the covers.
Amsoil MTF is in the viscosity range of 75W-80 at 10.1cSt@100°C. That is covered.
GL-4 is not a hard labeling requirement for best transmission life and shifting feel. Mazda says Mazda Long Life Gear Oil G7. The MTF is a good fit.
NOW - I will say shift feel can be extremely user dependent. Notchy to one person is oh so awesome to another.
Just for clarity, I tried Valvoline Syncromesh, Ford synthetic MTF and Redline MTL in the skyactiv 6spd before settling on the Amsoil fluid. If you dig deep enough amsoil has yellow metal test information and it passes gl-4 without issue. I'm not an amsoil fanboi but for this application it works better than the others I've tried.
Used redline in my manual Corolla back in the day and my synchros went out with no warning. I’ll never use another redline product in my life. And I know many use it and say it’s amazing. Currently I’m using Ravenol in my Getrag manual transmission (car is Focus ST) and I have used Motul in the past, which felt extremely smooth. You can’t go wrong with Amsoil.
