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⚙️ Shift smarter, drive smoother — the secret sauce for your manual transmission.
Royal Purple Synchromax is a premium synthetic transmission fluid designed for manual gearboxes, transfer cases, and 2-cycle motorcycle gearboxes. Featuring proprietary Synerlec additive technology, it enhances shift quality, reduces gear noise, and provides superior wear, corrosion, and oxidation protection. Its 5W viscosity grade ensures optimal performance across a wide temperature range, making it a top choice for professionals seeking reliability and efficiency.


| ASIN | B001DKTG0G |
| Best Sellers Rank | #45,665 in Automotive ( See Top 100 in Automotive ) #550 in Automotive Oils |
| Brand | Royal Purple |
| Brand Name | Royal Purple |
| Container Type | Jug |
| Customer Reviews | 4.8 out of 5 stars 1,623 Reviews |
| Global Trade Identification Number | 00641330015120 |
| Included Components | Auto part, Automotive Accessories, Replacement and Performance parts |
| Item Form | Oil |
| Item Type Name | Synchromax Qt. Transfluid |
| Item Weight | 454 g |
| Item weight | 454 g |
| Liquid Volume | 1 Quarts |
| Liquid volume | 1 Quarts |
| Manufacturer | Royal Purple |
| Material | Synthetic |
| Model Number | ROY01512 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Package information | Jug |
| Part Number | 01512 |
| Recommended Uses For Product | Corrosion Inhibitor |
| Recommended uses for product | Corrosion Inhibitor |
| SAE J300 Viscosity Grade | 5W |
| Specific Uses For Product | Manual transmissions, transfer cases, 2-cycle motorcycle gear boxes, wide temperature range operation, friction material compatibility, corrosion and oxidation protection |
| UPC | 641330015120 |
| Unit Count | 32 Milliliters |
| Viscosity | 5w |
| Warranty Description | Manufacturer Warranty |
V**R
lubrificante
ottimo
A**】
冷寒時の柔らかさがある
e46m3で使っているが、燃費も良くなり、回りもスムーズです。 一般的な10W-60よりも、冷寒時の粘度が低くて、素晴らしい。 良い製品と感じます。
A**E
Bon produit
Super huile pour boîte
C**S
Normal, nada especial.
No he notado ninguna diferencia ni mejoría respecto al aceite de transmisión de la marca Honda. Esto quiere decir que es un producto caro para lo que ofrece. Probé un producto de una reconocida marca alemana y he notado una diferencia importante, las marchas entran mas suaves y no me cuesta meter la marcha atrás. Mi conclusión es que es un producto caro para lo que ofrece. El aceite de transmisión de la marca alemana es a mitad de precio y me va mucho mejor.
T**X
I was skeptical this would make any difference...but it did. And the difference was impressive. I'm sold!
Got this to replace the MTX fluid in my 1998 Contour SVT, which I'm sure was still running the original fluid. The tranny felt like the former owner got a little too happy with the power shifts into 2nd--the synchro was really feeling like it was going to need replacement...something I really didn't want to tackle this year. Figured changing the fluid probably wouldn't help, but it was way over due anyway so I figured I'd just go ahead and do it. I did a quick search to see what type of fluid to use in it, and I kept seeing people recommend this... Now, I've been wrenching for more than 20 years, and I'm HIGHLY skeptical of anything that smells like "rebuild in a can", but I also try to keep an open mind...and frankly there were so many people recommending this I thought it was at least worth a try. Even if it didn't help at all, I figured it was probably no worse than the factory stuff. Had to be better than the almost 20 year old stuff in the car anyway lol. Anyway, I did a quick drain a replace, and took it out for a test drive. Frankly I was shocked at the difference...the improvement was immediate and very noticeable. The car shifted MUCH smoother, and I was very pleasantly surprised at how much quieter the car was. Does it shift like new? No. I can still feel the wear on the 2nd and 1st gear synchronizers...BUT, it's soooo much better than it was. So much so that I'm not worried about tearing into the tranny any time soon. I don't care if I get better gas mileage or anything else, the fact that it works so much better than it did would easily be worth twice or even three times what I paid. I'm very pragmatic when it comes to my repairs...I just want something that works. And this really does work. I'd recommend this to anyone doing a fluid change.
Trustpilot
5 days ago
2 months ago