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⚙️ Keep your transmission running like a dream—because smooth rides never go out of style!
Castrol Transmax DEX/MERC is a premium full-synthetic automatic transmission fluid engineered with Smooth Drive Technology. It delivers superior friction durability, high-temperature oxidation resistance up to 175°C, and unmatched copper corrosion protection. Designed for both stepped and continuously variable transmissions, it supports a wide range of vehicles globally, making it the go-to choice for professional-grade transmission maintenance.
| Asin | B00DILUBL6 |
| Best Sellers Rank | #9,194 in Automotive (See Top 100 in Automotive) #38 in Transmission Fluids |
| Brand Name | Castrol |
| Container Type | Bottle |
| Customer Reviews | 4.8 4.8 out of 5 stars (2,250) 4.8 out of 5 stars |
| Global Trade Identification Number | 00079191335208 |
| Included Components | 1 Gallon Jug of Automatic Transmission Fluid |
| Item Form | Liquid |
| Item Type Name | Automatic Transmission Fluid |
| Liquid Volume | 128 fluid ounces |
| Manufacturer | Castrol |
| Material | Calcium Sulfonate, Molybdenum Disulfide |
| Model Number | 03520 |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Part Number | 03520 |
| Recommended Uses For Product | Automotive |
| Sae J300 Viscosity Grade | 5W-30 |
| Specific Uses For Product | Automatic Transmission Maintenance, Vehicle Compatibility, Performance Improvement |
| Unit Count | 128 Fluid Ounces |
| Upc | 079191335208 |
| Upper Temperature Rating | 175 °C |
| Viscosity | 5w-30 |
| Warranty Description | 3 months |
User
It's Red
It's trans fluid, what else can be said !
User
A+
A+
User
Perfect in the Merc 722.n Gearbox.
This stuff meets the Dexron II and III requirements my Mercedes-Porsche auto gearbox demands. Many more modern "works in anything" fluids are nothing but problems for 'vintage' euro GT cars. This one works perfectly.I'm very happy that this is still available. A few local stores stock it, but at a cost premium. Thank goodness Jeff B. had an old Mercedes, and keeps bottles of this for me in his warehouse/garage.
User
Car part
Very useful.
User
2005 Honda Odyssey Touring
I used this for the transmission fluid flush on my 2005 Honda Odyssey Touring with 221k miles. Unknown when last transmission fluid change was, but it's part of Honda's maintenance schedule - so ~30-60k miles. I ran this fluid for a few weeks (~500 miles) before flushing it out and putting in the Honda OEM ATF. In the Odyssey, you cannot drain all of the fluid out the first drain (some left in cooler, lines, solenoids). The recommended total "flush" is to fill/drain 3x times (I only did 2x). On the 2x fill I used the Honda OEM ATF, since the cost is reasonable for my budget. I cannot tell a difference in shifting/drive-quality between Honda OEM ATF and this.
User
Great Trans Fluid
Great stuff!
User
good oil
Works well
User
Muy bueno
Muy bueno
Trustpilot
1 month ago
1 month ago