Ford Genuine Ford Fluid XT-M5-QS Full Synthetic Manual Transmission Fluid - 1 Quart , black

After a clutch-job I refilled my 2000 Miata's transmission with a name-brand fluid that met the specification - but it never felt quite right.After some on-line research, this Ford fluid kept coming up as the best thing to put in my transmission.Known in the Miata community as "Unicorn Tears" due to its cost ($30 per quart at the time of this writing and we need to buy 3 because the transmission requires 2.1 qt), it turns out that this stuff does indeed perform very well.The change is subtle but noticeable - particularly when shifting into first gear at a stop sign. I don't know how to describe it other than to say that it feels like the synchronizers are operating better than they did on the other fluid.Don't take this to mean that it's going to fix a worn out old transmission. It won't. Again, the difference is subtle.But if you're finding it slightly difficult to get in gear, this may help.

when it comes to transmissions I stick to OEM. This is what my car came with from the factory and this is what I put it in now .

Works great in my 2017 Miata ND - Butter smooth shifts!

My first experience with the magic of this fluid was in my 1991 Miata 5MT. The car was super low miles when I bought it in 2012 (36K miles) and all the major mechanical parts were as good as new. Initially, I opted for redline MTL in the transmission and got a noticeable improvement in shifting when hot, but cold shifting into 1st and 2nd was still overly notchy and inconsistent. If you're really ripping it and doing rev match downshifting at high rpm, it would occasionally grind into 2nd.After getting fed up with it, I did further research and found tons of folks singing the praises of this fluid. It's relatively pricey, but most Mazda manual transmissions rarely take more than two quarts so it's about 50-$60 upgrade, which is cheap in the car world. After buying some and changing out my redline fluid with 10K miles on it, the difference was IMMEDIATE!Shifting into 1st and 2nd cold was absolutely buttery smooth. Rev-match downshifting at high-rpm is perfect with no grinding or excessive resistance. I eventually put 35K miles on this Ford fluid and it was good the whole way through. I changed it again in 2018 and I can say that shifting has always been a joy in that car.In 2020, I purchased my sensible daily driver, a 2017 Mazda 3 2.0L with the 6 speed manual. Right off the hop, the car's cable shifter is very easy to shift into almost every gear at nearly every temperature. However, sometimes it would refuse to go into 1st unless I did some modulation of the clutch. The car only had 30K miles and is mechanically perfect. So I had a brainwave and checked to see if any Mazda 3 owners tried this fluid in their cars. Sure enough, they had, and with great results!I ordered some (again only 2QTs needed) and wasted no time changing out the really clean OEM fluid with the secret sauce. Right away, the already smooth and easy shifting got smoother and easier. I'd say about 10% less effort on average to shift up and down to any gear. Best of all, my difficulty shifting back into 1st completely vanished. It's just like going into any other gear now and I couldn't be happier. MPG is still fantastic, with about 42MPG on the highway and 35MPG in the city unless I'm really ripping it. I don't know what special blend of 11 herbs and spices this fluid contains, but Mazda manual gearboxes seem to love it.SUMMARY:So it's settled then. If you have a Mazda made within the last 30 years and it's got a stick shift, it'll likely see a massive improvement in shift quality and consistency from factory fluid or even better stuff like redline. That said, you should still do your own research as some cars do call for specific fluids for a good reason. Competent forum posters will be your best friends. I hope this fluid stays in production for a while, because I have no intention of ever switching to something else in the future.

Definitely use this if you own a 6 speed Miata. I replaced the clutch, flywheel, bearings, clutch lines, master and slave cylinders, (it really only needed the clutch and flywheel...but whatever) and I'm still in the "break in" stage, but it shifts like a blazing hot knife through warm butter now.This transmission didn't shift this smooth when it was new!Too bad it has doubled in price.

Supposedly this is the 'Unicorn Tears' I was needing for my NA Miata shifter rebuild/diff refill. Hasn't disappointed. Thanks Unicorn

This transmission oil is said to work miracles in Mazda MX-5/Miata manual transmissions. I have had it in mine for about 3 months. It works well but I don't notice any difference in the way the gears shift and feel as compared with other transmission oils I have used. Pricey, as compared with most other transmission oils.Edit review

I use it on my track Miata and the race shop I work at (specializing in Miatas) uses it exclusively on all their race cars. Never had a problem. Great product but expensive.