[yaya23]

UOA analyzes are something precise, in any case which needs to be precise to mean a semblance of something,
What is the procedure for collecting a sample to make a UOA ?
When we see how quickly the particles are deposited at the bottom of the containers by gravity, imagining that it must be the same in the crankcases of the car.
I find it hard to believe that this does not distort the results, not to mention the presence of the oil filter for the engine oil and the magnetic plugs for the diff and sometimes the gearbox.

 

[yaya23]

Join me in the unicorn tears club next

Did you have a problem with the Ford Motorcraft ?

 

[CasualGuy]

I just put the Motorcraft "unicorn tears" in my '24 a few weeks ago. I've only done a little street driving since then (<100 miles), but it feels as least as good as OEM and maybe a little better. I'll be hitting the track June 14-16 and 22-23, so that will be the real test.

 

[balucipher]

I just put the Motorcraft "unicorn tears" in my '24 a few weeks ago. I've only done a little street driving since then (<100 miles), but it feels as least as good as OEM and maybe a little better. I'll be hitting the track June 14-16 and 22-23, so that will be the real test.

Yesss, looking forward to you reporting back. I'm gonna run MT90 for two track days and then drain/refill in August with unicorn tears so if you like it on track I'm stoked to swap.

 

[yaya23]

Yesss, looking forward to you reporting back. I'm gonna run MT90 for two track days and then drain/refill in August with unicorn tears so if you like it on track I'm stoked to swap.

I misunderstood your message from before I thought that you already had the Ford oil and that ironically you were talking about tears because you had had a problem with it.

 

[ruturaj1989]

I just put the Motorcraft "unicorn tears" in my '24 a few weeks ago. I've only done a little street driving since then (<100 miles), but it feels as least as good as OEM and maybe a little better. I'll be hitting the track June 14-16 and 22-23, so that will be the real test.

Gotta do UOA as well to get a full picture.

 

[ruturaj1989]

I misunderstood your message from before I thought that you already had the Ford oil and that ironically you were talking about tears because you had had a problem with it.

Ford oil is called "unicorn tears" in miata community due to difference it makes when using.

 

[balucipher]

I misunderstood your message from before I thought that you already had the Ford oil and that ironically you were talking about tears because you had had a problem with it.

Haha whoops. No that stuff is called unicorn tears because of how good it is in everything it goes in. Miata people swear by it

 

[DylanJZA]

Supra people (A70/A80) have also used it and the Motorcraft diff oils as well with success for the same reasons; the stuff works well for quieting things down and improving feel in many cases.

 

[Mcgiiver]

Trans oil:
Both are GL-4. MT-LV 70W/75W matches the OEM viscosity. Some have said that the OEM viscosity is so thin for fuel economy etc. at the expense of better feel. My question is, has anyone used the thicker MT-90 75W90 after break in and had good experiences with it? I'm sure it takes longer to warm up, but does it improve feel after warm up? I live in a SoCal. Thanks.

Same question for the Diff:
75W85 GL-5 gear oil would be the Redline recommended diff oil
but would a better choice be for better protection and less wear be the thicker: 75W90 GL-5 gear oil?

I swapped the OEM trans oil to Redline MT-90. I was shocked at how watery the OEM oil was. However, the MT-90 makes the 1-2 shift tricky until it gets warmed up, so I am thinking MT-90 is a bit too thick. My next trans oil change will be to MTL75w-80, which I think will be ideal. In the diff, I use Valvoline 75w-90 and noticed no difference from the OEM oil.

 

[las27563481]

No worries, here is my whole table

	Vis@40°C	Vis@100°C
Toyota LV 75W MT	30	5.7
MOTUL GEAR POWER FE 75W	30.7	5.8
Redline MT-LV 70W/75W	29.8	6.5
MOTUL MULTI DCTF	34.7	7.1
Royal purple SYNCHROMAX	39	7.5
Pentosin MTF2 75w80	38.3	7.7
AMSOIL Synchromesh 5W-30	49.4	10.1
Redline MTL 75W80	50.8	10.4
MOTUL GEAR POWER 75W-80	69.4	10.5
Redline MT-85 75W85	62	12
AMSOIL Manual Transmission Gear Lube 75W-90	80.3	14
MOTUL GEAR 300 75W-90	86.2	14.2
LIQUI MOLY High Performance Gear Oil GL4+ 75W-90	81.5	14.3
PENNZOIL PLATINUM GEAR 75W-90	108	15.3
Ford Motorcraft XT-M5-QS 75W-90	76	15.4
Redline MT-90 75W90	82	15.5
Penrite PRO GEAR GL-4 75W-90	105	17.4

Super Helpful! Thanks.

 

[las27563481]

Interesting, That table appears to be sorted by 100°C kinematic. The Pennzoil Platinum 75W-90 has higher 40°C than all others, but near the middle @ 100°C. It must be super thick when cold. More often the 40C and 100c follow one another more closely, except in diluted samples.
Chart of Viscosities from table: (resolution isn't great because of difference of scale.)

 

[BRZerker]

No worries, here is my whole table

	Vis@40°C	Vis@100°C
Toyota LV 75W MT	30	5.7
MOTUL GEAR POWER FE 75W	30.7	5.8
Redline MT-LV 70W/75W	29.8	6.5
MOTUL MULTI DCTF	34.7	7.1
Royal purple SYNCHROMAX	39	7.5
Pentosin MTF2 75w80	38.3	7.7
AMSOIL Synchromesh 5W-30	49.4	10.1
Redline MTL 75W80	50.8	10.4
MOTUL GEAR POWER 75W-80	69.4	10.5
Redline MT-85 75W85	62	12
AMSOIL Manual Transmission Gear Lube 75W-90	80.3	14
MOTUL GEAR 300 75W-90	86.2	14.2
LIQUI MOLY High Performance Gear Oil GL4+ 75W-90	81.5	14.3
PENNZOIL PLATINUM GEAR 75W-90	108	15.3
Ford Motorcraft XT-M5-QS 75W-90	76	15.4
Redline MT-90 75W90	82	15.5
Penrite PRO GEAR GL-4 75W-90	105	17.4

Thanks for posting that chart! If you want to add another option, Ravenol MTF-2 75w80 is 35.1 cst at 40 C and 7.4 cst at 100 C.

 

[ruturaj1989]

Interesting, That table appears to be sorted by 100°C kinematic. The Pennzoil Platinum 75W-90 has higher 40°C than all others, but near the middle @ 100°C. It must be super thick when cold. More often the 40C and 100c follow one another more closely, except in diluted samples.
Chart of Viscosities from table: (resolution isn't great because of difference of scale.)
View attachment 48584

Thank you for making this, I had a rough picture in my mind but this is much better. No wonder ford motorcraft is smoothest at low temperatures among 75w90 fluids.

Yes, it is sorted by 100°C kinematic.

Thanks for posting that chart! If you want to add another option, Ravenol MTF-2 75w80 is 35.1 cst at 40 C and 7.4 cst at 100 C.

Thanks, will add it.

	Vis@40°C	Vis@100°C
Toyota LV 75W MT	30	5.7
MOTUL GEAR POWER FE 75W	30.7	5.8
Redline MT-LV 70W/75W	29.8	6.5
MOTUL MULTI DCTF	34.7	7.1
Ravenol MTF-2	35.1	7.4
Royal purple SYNCHROMAX	39	7.5
Pentosin MTF2 75w80	38.3	7.7
AMSOIL Synchromesh 5W-30	49.4	10.1
Redline MTL 75W80	50.8	10.4
MOTUL GEAR POWER 75W-80	69.4	10.5
Redline MT-85 75W85	62	12
AMSOIL Manual Transmission Gear Lube 75W-90	80.3	14
MOTUL GEAR 300 75W-90	86.2	14.2
LIQUI MOLY High Performance Gear Oil GL4+ 75W-90	81.5	14.3
PENNZOIL PLATINUM GEAR 75W-90	108	15.3
Ford Motorcraft XT-M5-QS 75W-90	76	15.4
Redline MT-90 75W90	82	15.5
Penrite PRO GEAR GL-4 75W-90	105	17.4

 

[las27563481]

This list makes me wonder the naming conventions of these oils. AMSOIL Synchromesh 5W-30 in the middle of the viscosity values of 75W(75-90) oils? SAE xW20-40 engine oils have similar kinematic values as these, again 75W(75-90) oils, explanation????? 5w30 range is 9.1-11.3, 0w20 is 6-9.7 (100°C cSt.) Are gear oils evaluated and classified differently or to different standards than engine oils? And the Pennzoil I mentioned earlier looks like a straight SAE XX weight oil.... to me.

 

[ruturaj1989]

This list makes me wonder the naming conventions of these oils. AMSOIL Synchromesh 5W-30 in the middle of the viscosity values of 75W(75-90) oils? SAE xW20-40 engine oils have similar kinematic values as these, again 75W(75-90) oils, explanation????? 5w30 range is 9.1-11.3, 0w20 is 6-9.7 (100°C cSt.) Are gear oils evaluated and classified differently or to different standards than engine oils? And the Pennzoil I mentioned earlier looks like a straight SAE XX weight oil.... to me.

Yes, it's a different standard for engine and transmission oils. Pennzoil is conventional (not synthetic) oil.

 

[ruturaj1989]

Interesting, That table appears to be sorted by 100°C kinematic. The Pennzoil Platinum 75W-90 has higher 40°C than all others, but near the middle @ 100°C. It must be super thick when cold. More often the 40C and 100c follow one another more closely, except in diluted samples.
Chart of Viscosities from table: (resolution isn't great because of difference of scale.)
View attachment 48584

Thinking more about the graph, may be we should make one with 100c values on right side with different scale (0-20) for better interpretation of those values going up, but it can get confusing.

 

[las27563481]

Thinking more about the graph, may be we should make one with 100c values on right side with different scale (0-20) for better interpretation of those values going up, but it can get confusing.

Rough Draft (scales:40°C on left, 100°C on right): edit: Leaving it as is.

 

[Pyrenees]

This thread has perfect timing, was thinking about doing mine.

 

[ruturaj1989]

This thread has perfect timing; I was thinking about doing the manual trans and diff fluids over the summer @23k mi on my '22. Just for the sake of warranty purposes, I assume that all of the fluids discussed here so far meet the minimum requirements as far as Toyota is concerned? Part of me was a little paranoid and wanted to get the stuff from the Toyota/Subaru parts dept counters, but part of me realizes that's probably silly...

Not all of these match exact specs. If you want to follow specs in manual, you need GL4 75w fluid in transmission and GL5 75w85 or 75w90 fluid in diff.