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Old 11-06-2012, 01:31 PM   #121
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Motorcraft synthetic MTF
Show us UOA results.
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Old 11-08-2012, 01:10 AM   #122
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Here's an additive you can try. A friend of mine knows the inventor of the stuff. I added some to my Amsoil MTG and it seems to have helped a bit with a notchy cold 3rd gear shift.

Anti friction metal treatment lubricants and additives for engines, gear bearings, etc. - MaxiLube.com
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Old 11-08-2012, 09:14 AM   #123
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Originally Posted by wannafbody View Post
Here's an additive you can try. A friend of mine knows the inventor of the stuff. I added some to my Amsoil MTG and it seems to have helped a bit with a notchy cold 3rd gear shift.

Anti friction metal treatment lubricants and additives for engines, gear bearings, etc. - MaxiLube.com
Synchronizers, how do they work?
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Old 11-08-2012, 10:54 AM   #124
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Synchronizers, how do they work?
I think they work by friction. However, under the slideshow portion of the website Maxilube recommends using 5 ounces in a manual transmission.
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Old 11-08-2012, 11:08 AM   #125
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I think they work by friction. However, under the slideshow portion of the website Maxilube recommends using 5 ounces in a manual transmission.
Right, so reducing friction makes them shift slower and grind typically.

I'm sure Maxilube also believes their product cures AIDS.
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Old 11-08-2012, 12:38 PM   #126
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I'm putting amsoil MTG in my 6 speed since my 5 speed grenaded with MTL in it under stock power.
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Old 11-08-2012, 12:43 PM   #127
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I'm putting amsoil MTG in my 6 speed since my 5 speed grenaded with MTL in it under stock power.
Stock 5 speeds just like to grenaded at any power level. Stick to MTG in the 6 speed and you will be good.
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Old 11-08-2012, 01:46 PM   #128
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Stock 5 speeds just like to grenaded at any power level. Stick to MTG in the 6 speed and you will be good.
Sounds about right, this was my third 5 speed.

Hopefully my 6 speed swap goes without a hitch.
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Old 01-12-2013, 02:29 PM   #129
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We have been using MTG off an on in our street cars as well as the race cars for a few years now. Good when cold but best when hot. For a gently driven, high mileage, low power daily, redline MTL still works well. MTL is too thin for any performance use though.

The MTG seems to last 20-30hrs on track. Keep in mind our endurance cars keep the oil hot so our temp histogram would have a lot more hours in the 260+ range than most. IOW, we spend very little time coming up to temp in relation to time at peak temp. What that means is our 20-30 hrs would probably translate to 30-50hrs for an HPDE/TT guys, maybe more for all street drivers.

SVG for Torsen.

We're still using the Redline heavy shockproof for Crusher but Andrew is right, it doesn't last nearly as long as the MTG we had been using the last few years. I keep breaking shift forks in the 6 speeds and the Heavy Shockproof has been an attempt to curtail those failures. It hasn't so we'll switch back to MTG as we had been using.
No oil is going to keep shift forks from breaking. They are braking because there is no stops on the shifter and the forks and other internals take all the overshifting force. There us a company called Race Roots that sells a bolt on shifter stop kit (they call it Synchro Saver) for the Aisin RX8 6 spd. I had numerous trans blow ups until finally moving into a class that allowed me to use it. You might try to see if it will retrofit onto the Miata 6 spd or at least show you how to make an equivalent one specifically for it.

Fwiw I run heavy shockproof, but don't recommend it for street use. Some RX8 owners swear by the Eneos trans fluid.

And not all GL5 oils are the same or bad for synchro gear box use. Thats a general misleading statement that just won't seem to die or go away. Technology doesn't stand still, but sage advice from times past keeps on perpetuating itself no matter how irrelevant.
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Old 01-12-2013, 02:38 PM   #130
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You guys are noobs.


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Old 01-12-2013, 07:56 PM   #131
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Redline doesn't recommend Heavy Duty Shockproof in transmissions as it may be too slippery.
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Old 01-12-2013, 08:11 PM   #132
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That's what people said when I started using it back in 2006 ....
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Old 01-13-2013, 02:45 PM   #133
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We have seen wear on the Miatas AZ-6 aluminum shift forks that we thought might be alleviated by using a lube more suited to EP conditions than specific trans lube, like the Redline HD shockproof. It didn't. So we went back to the MTG we had been using. My sincere apologies for not being relevant Team RX8.
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Old 01-16-2013, 03:48 PM   #134
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Emilio, would you recommend the MTG in the 5 speeds also? (pardon the derail from 6 speeds.)
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Old 01-16-2013, 06:53 PM   #135
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Quote:
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Emilio, would you recommend the MTG in the 5 speeds also? (pardon the derail from 6 speeds.)
Yup
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Old 01-28-2013, 10:46 PM   #136
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Guys, I cant get the Amsoil MTG in New Zealand.

So I have tried to find the motrocraft....our useless dealers here have no idea what the product is...

So further research found it to be apparently a Castrol product called "Castrol Syntrans Multivehicle 75W-90 Fully Synthetic MTF" that we can get in our little country.

Can you confirm the Motorcraft/Amsoil is what you use in the NB torsens as well....I THINK I read that correct in this thread....?

Car is a 1600 turbo with 6 speed and NB 3.9 (out of a 99) for track and soon to be race use...
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Old 01-29-2013, 12:38 AM   #137
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Having re read the thread I am not sure why I thought it was mentioned to use in the diff as well.

Nevermind...im losing it
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Old 02-09-2013, 03:20 PM   #138
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I went from factory to Mobil 1, could tell a big difference (could be attributed to 70k on the odometer not changed) and then to redline didn't notice anything different.
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Old 02-22-2013, 10:10 PM   #139
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I've been using the Motorcraft stuff for several years with excellent success.
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Old 04-14-2013, 09:06 AM   #140
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Need to change fluid in my 6spd, where can I buy Amsoil MTG?
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