Amsoil MTF fluid used, any harm? Wanted to try something different.....

[Blitz16v]

I used the search but did not find enough information regarding the weight difference, the manual calls for 10w-30 and the Amsoil is 5W-30 but it is a direct replacement per the Amsoil website.


My initial impressions is. This stuff shifts VERY smooth and very direct no more notchiness whatsoever and extremely quiet. This is how I feel this S2000 should shift and I am extremely pleased with the performance and quietness thus far. With that said am I doing any harm using this weight, I trust the shop that put it in [extremely reputable on these forums] and their recomendation but just want some more feedback.

TYPICAL TECHNICAL PROPERTIES
Revised as of 1/06
Synthetic Synchromesh Transmission Fluid 5W-30 (MTF)
Kinematic Viscosity @ 100°C, cSt (ASTM D-445) 9.6
Kinematic Viscosity @ 40°C, cSt (ASTM D-445) 47.1
Viscosity Index (ASTM D-2270) 194
Flash Point, °C (°F) (ASTM D-92) 150°C Min. 224 (435)
Pour Point, °C (°F) (ASTM D-97) -45 (-49)
4-Ball Wear 75°C, 1200 rpm, 40kg, 1 hr. 0.40mm
Brookfield Viscosity @ -40°C 38,273
Foam Stability (ASTM D-892) (20/50/20) 0/0/0
Copper Corrosion (3 hr, 121°C) (ASTM D-130) 1A

[ninja]

you'll be fine

[repiv]

You can always put in a magnetic drain plug and keep track of any particles that may stray onto it. Our trannies already have a magnet but you can't see how it's doing unless you take the tranny apart. Introduce another magnet and you should get some distribution of particles to it.
The only thing I might be concerned about would be extreme hot operating conditions. I've seen with engine oil that a 10W30 will generate just a bit better oil pressure than a 5W30 under the same hot conditions. I'm sure this is true of MTF.
Amsoil is a well known and proven product line even though some distributors market the product in a very annoying and "fiddly" way. Some will con you into doing the "full meal deal" and buy a series of products to flush, treat and condition the part first. I see this as purely a money making ploy and not necessary.
The biggest issue we've seen with MTF is that many simply don't last very long. This is where the Honda MTF shines above the rest for routine daily use, where there is no issues with the tranny's operation.
Of course, you can always run it for a few thousand miles and then get an oil analysis done to satisfy your own peace of mind.

[blownS]

I run the Amsoil MTF myself. Very pleased with the "feel."

[Jasonoff]

I love the stuff and I have tried pretty much everything in my car.

It's not as smooth as the the GM Synchromesh at first BUT it keeps its consistency. IE.. 2 months in and the GM stuff feels like garbage but the Amsoil MTF is the same as the day I put it in.

It also works very well in cold temps. Much better than OE.

It would be VERY hard to convince me to try something else.

[repiv]

It also works very well in cold temps. Much better than OE.
This makes sense and doesn't surprise me. If the OEM MTF is closely approximated by 10W30, then the 5W30 Amsoil, being a bit thinner, should work better in the cold. I think about the only thing to be concerned about, would be hot temp operations where it may not hold it's "30" quite as well as the OEM. That's why I thought it might be interesting to see what an oil analysis has to say. It would likely show good results (being Amsoil), but it would still be worthwhile to see it in a report.
Our trannies can get pretty hot in the summer and under hard usage. I think a tranny fluid cooler would be of great benefit to us, but in the absense of such a thing, the fluid has to hold up all on its own.

[rioyellows2k]

And this keeping consideration that Honda released a new MTF a few months ago? Again, Honda fluids FTW....

I just found out that Honda Type-2 Coolant in vehicles released after 2001 has a 10 year service interval....Holy Crap!

i'd never do it, but still....just that claim.....

[repiv]

I just found out that Honda Type-2 Coolant in vehicles released after 2001 has a 10 year service interval....Holy Crap!
That was my reaction, too, when I first saw this back in the '01 model. I'd at least have it checked annually beginning at the 6 year mark. Also, note that in many cases of original coolant, once it's first replaced (like at the 10 year interval), the next batch of coolant may not be good for the same amount of time. In the case of Type II, the second interval is only 5 years.

In the case of the coolant in the '00, the first interval is 3 years, then every 2 years thereafter. This is likely to keep the build up of deposits in check in an older vehicle.

[Jasonoff]

This makes sense and doesn't surprise me. If the OEM MTF is closely approximated by 10W30, then the 5W30 Amsoil, being a bit thinner, should work better in the cold. I think about the only thing to be concerned about, would be hot temp operations where it may not hold it's "30" quite as well as the OEM. That's why I thought it might be interesting to see what an oil analysis has to say. It would likely show good results (being Amsoil), but it would still be worthwhile to see it in a report.
Our trannies can get pretty hot in the summer and under hard usage. I think a tranny fluid cooler would be of great benefit to us, but in the absense of such a thing, the fluid has to hold up all on its own.

Synthetic Synchromesh Transmission Fluid 5W-30 (MTF)

Kinematic Viscosity @ 100°C, cSt (ASTM D-445)__9.6
Kinematic Viscosity @ 40°C, cSt (ASTM D-445) __47.1
Viscosity Index (ASTM D-2270) ______________194
Flash Point, °C (°F) (ASTM D-92) 150°C Min. ____224 (435)
Pour Point, °C (°F) (ASTM D-97) ______________-45 (-49)
4-Ball Wear 75°C, 1200 rpm, 40kg, 1 hr. _______0.40mm
Brookfield Viscosity @ -40°C ________________38,273
Foam Stability (ASTM D-892) (20/50/20) ________0/0/0
Copper Corrosion (3 hr, 121°C) (ASTM D-130)___1A

Anyone know what the flash point is of the honda mtf?

Below are the stats for Redline
http://www.redlineoil.com/pdf/6.pdf

Flash Point, °C MTL® = 232 MT 90 = 240
Flash Point, °F MTL® = 450 MT 90 = 465