S2000 Under The Hood S2000 Technical and Mechanical discussions.

Gearbox oil recommendation?

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Old 04-30-2019, 04:44 PM
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Originally Posted by Mr.Matchbox
the honda mtf and mtf 3 viskosity in cst at 40°c and 100°c are:

mtf: 50,8 - 7,5
mtf3: 32,5 - 7,2

source: google search, oil analysis on bob is the oil guy and so on. you could do you own search.

these viskosity values are handy when you search for a alternative for the honda mtf. you could compare the honda mtf values with datasheets from oil manufacturers.
and yes, honda mtf is in the 75w-80 range. the mtf 3 is more in the 75w range.
Anybody knows to find the values for the Amsoil MTF to compare?
Old 04-30-2019, 06:17 PM
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Originally Posted by Mr.Matchbox
the honda mtf and mtf 3 viskosity in cst at 40°c and 100°c are:

mtf: 50,8 - 7,5
mtf3: 32,5 - 7,2

source: google search, oil analysis on bob is the oil guy and so on. you could do you own search.

these viskosity values are handy when you search for a alternative for the honda mtf. you could compare the honda mtf values with datasheets from oil manufacturers.
and yes, honda mtf is in the 75w-80 range. the mtf 3 is more in the 75w range.
We don't have Honda MTF3 in North America, we had Honda MTF in the early to mid 2000's then it switched to Honda MTF2. The original Honda MTF here was thicker than MTF2, somewhere along the lines of a 10w30 oil , the current Honda MTF2 is more along the lines of a 20 weight oil.
Old 04-30-2019, 06:20 PM
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Originally Posted by Chuck S
For grins I looked up the maintenance schedule for the gearbox. Had to use the 2005 owners manual 'cuz there's no schedule in my 2006 manual, it's all in the Maintenance Minder.

Replace manual transmission fluid. Every 120,000miles (192,000 km) or every 6 years, whichever comes first. Honda expects their MTF to last quite a while! Anyone run theirs that long? (Severe service would be half that.) I have no scientific data indicating my gearbox shifts better or even differently from whatever oil the prior owner had in it in 2014 to the Honda MTF I put in the next spring to the Royal Purple SyncroMax in there now. A lot of this stuff is perception -- we expect the gearbox to be smoother with an oil change. And since I just rolled the odometer over 60,000 I'm sure the oil change has met specs.

Just a line below it on the same page: Replace rear differential fluid. Every 30,000miles (48,000 km) or every 2 years, whichever comes first. The differential is the one to be concerned with as to wear. I'll be changing this next month along with the engine oil. Gearbox is a game time decision but since I'm under the car and oil is cheap...

-- Chuck
I always found Honda MTF2 started to feel worse around 7k-10k miles , it also shears over time with the meshing action of the gears so it gets thinner with use, likely to the point of being worse at some point in time. It likely can protect for a long time but at some point it starts to feel worse for some reason. Just my opinion here.
Old 05-01-2019, 02:35 AM
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@ simons: Technical Information -> Data Bulletin -> Open PDF

https://www.amsoil.com/shop/by-produ...?code=MTFQT-EA

The value for the synchromesh is 49.4 - 10.4. Compared with the Honda MTF, it´s the same when cold, but a little bit thicker when hot. Thats generally considerd as better for wear protetction.

@ zeroptzero: Thanks, i dont know that you dont have MTF 3 in the USA. But, being a international forum with members from all arund the world, it is maybe helpfull for others.

Do you have the values for the Honda MTF 2 ?
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Old 05-01-2019, 05:46 AM
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Originally Posted by Mr.Matchbox
@ simons: The value for the synchromesh is 49.4 - 10.4. Compared with the Honda MTF, it´s the same when cold, but a little bit thicker when hot. Thats generally considerd as better for wear protetction.
mtf: 50,8 - 7,5
mtf3: 32,5 - 7,2

So actually, the Honda mtf3 is much thinner when cold than the Amsoil. Amsoil 49,4 @40C vs mtf3 33,5.

Makes me wonder why people report smoother shifting when cold compared to Honda mtf. Not sure which version those people of mtf had used? As was posted that the mtf had become thinner when cold then early mtf formula.

Now wondering again if I should get the MTF3 or Amsoil!?
Old 05-02-2019, 12:21 AM
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With so many positiv reports in all Honda Forums, i would not overthink it and just give the Amsoil a try. If you live in Europe, i would recomend you to try the Ravenol MTF II 75w-80.

In my personal opinion, the viscositiy is important for the feeling when the oil is cold, after the start. But it´s also the additive package and Oil qualitiy that makes a difference in shift feeling when the oil is hot.
Old 05-03-2019, 02:08 PM
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Originally Posted by simons
How long do you keep it between changes? You change based on miles or years or when you feel the gear change is getting less smooth?
with other oils, including honda mtf, i changed when it didn't feel as smooth as new. for a lot of brands, it was very quick, 4-8 months.

with amsoil, i've honestly never felt it become not smooth. so i changed when i felt it had been a long time or many miles, around 2 years or 20,000 miles.

that's why i recommend the amsoil mtf so much, it lasts a long time as far as the smooth when new feeling.
Old 05-04-2019, 12:28 PM
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Whatever fluid you use, change it frequently. Once a year minimum.
Old 05-07-2019, 03:04 AM
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I use redline in my gearbox and diff, seems to work well.
Old 05-07-2019, 12:26 PM
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Dumb question: Is it better to change the transmission and gear oil while the fluid is warm? Like shortly after a drive?


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