---
product_id: 253544437
title: "03520C Transmax Dex/Merc Atf, 1 Gallon, Automatic, Black"
brand: "castrol"
price: "$241.49"
currency: USD
in_stock: true
reviews_count: 5
category: "Castrol"
url: https://www.desertcart.us/products/253544437-03520c-transmax-dex-merc-atf-1-gallon-automatic-black
store_origin: US
region: United States of America
---

# High-temp oxidation resistance Enhanced friction durability Copper corrosion protection 03520C Transmax Dex/Merc Atf, 1 Gallon, Automatic, Black

**Brand:** castrol
**Price:** $241.49
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into the future with Castrol’s ultimate transmission fluid!

## Quick Answers

- **What is this?** 03520C Transmax Dex/Merc Atf, 1 Gallon, Automatic, Black by castrol
- **How much does it cost?** $241.49 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/253544437-03520c-transmax-dex-merc-atf-1-gallon-automatic-black)

## Best For

- castrol enthusiasts

## Why This Product

- Trusted castrol brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Withstand Heat:** Superior high-temperature protection keeps your transmission fluid stable under pressure.
- • **One Fluid, Many Vehicles:** Broad vehicle compatibility streamlines your workshop inventory and boosts efficiency.
- • **Smooth Shifts, Every Time:** Experience seamless transmission performance with enhanced friction durability.
- • **Corrosion? Not on Our Watch:** Unrivaled copper corrosion defense extends transmission life.
- • **Trusted by Pros, Loved by Drivers:** Highly rated with 4.8 stars and proven performance in real-world driving conditions.

## Overview

Castrol 03520C Transmax Dex/Merc ATF is a premium automatic transmission fluid designed for superior friction durability, high-temperature oxidation resistance, and exceptional copper corrosion protection. Compatible with a wide range of vehicles, it enhances transmission smoothness and longevity, making it a top choice for professionals and enthusiasts alike.

## Description

Buy Castrol 03520C Transmax Dex/Merc Atf, 1 Gallon, Automatic, Black online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: Fluid good. It was excellent.
Review: So far I am highly impressed. I used this fluid on a 2009 Mitsubishi Lancer ES with 109k on it. This CVT fluid is a fraction of what the OEM JT1 fluid would cost. I did this with a pan drop and filter change as well. Thank you for other reviewers who noted that transmission shifted roughly after the change. That way I didn't lose it the first few miles thinking I had killed my CVT. I observed this too. Mine took about 30 miles to finally even out and now the change is dramatic. I must note I just got this car and I am not sure if fluid or filter was ever done but the CVT is transitioning between ratios much smoother now. I did have a lot of whine in my CVT before the change and I have not noticed any yet but I really have yet to take a long trip to warm the CVT enough to get the whine. I will try to update on my next long trip or the next change at 140k Miles Edit 1: about 1200 miles in a things are going well. I wanted to update that the CVT whine is gone. took a 2-hour drive to get good and warm but no whine like before. CVT is nice and quiet. Will update again if anything major happens before 140k Edit 2: CVT strikes This fluid is done by 22k miles. about 8k before recommended service. On a longer trip the whine came back and got a temp warning for transmission. Slowed down and it went away but checking fluid color is pretty bad and I have about 22k on fluid so going to change at every 20k now. I don't believe this is the fluid's fault I think this is just the nature of the CVT. CVT is still shifting good and no chattering just fluid is broken down quicker than expected. I do live in Texas and high heat may have added to this but not sure. I will how ever be using Castrol again as I think its doing pretty good so far.

## Features

- Enhanced friction durability for smooth transmission performance
- Superior high temperature protection to effectively resist oxidation
- Unsurpassed protection against copper corrosion
- Broad scope of vehicle applications improves workshop efficiency and inventory management

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00DILUBL6 |
| Best Sellers Rank | #157,584 in Automotive ( See Top 100 in Automotive ) #3,018 in Oils & Fluids |
| Brand | Castrol |
| Customer Reviews | 4.8 4.8 out of 5 stars (4,886) |
| Date First Available | 21 June 2013 |
| Item Weight | 3.39 Kilograms |
| Item model number | 03520 |
| Manufacturer | Castrol |
| Manufacturer Part Number | 03520 |
| Model | 03520 |
| Product Dimensions | 11.73 x 24.13 x 29.26 cm; 3.39 kg |
| Viscosity | 4 to 6 cSt at 100°C |

## Product Details

- **Brand:** Castrol
- **Liquid volume:** 128 Fluid Ounces
- **Material:** Molybdenum Disulfide Calcium Sulfonate
- **Package information:** Bottle
- **Recommended uses for product:** Automotive

## Images

![03520C Transmax Dex/Merc Atf, 1 Gallon, Automatic, Black - Image 1](https://m.media-amazon.com/images/I/61aEVtXcf5L.jpg)

## Questions & Answers

**Q: Can I use it in a 2000**
A: Honda s2000?  2000 model year Ferrari? 2000 individual mini cooper's? Perhaps the answer isn't in the answer. Perhaps the answer is in the question. As in, why would you touch your vehicle if you can't ask an appropriate question?

**Q: will this work for a 98 jeep cherokee auto 4wd**
A: Here is a link to the list of approved vehicles from Castrol!!!

https://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/1BF017717048528380257EDC004D3B0A/$File/BPXE-9FT8RL.pdf

**Q: does this fluid replaces ATF-Z1?**
A: ATF-Z1 is Dex3 with a friction modifier. This will cover that spec. As the trans ages & wears you may be better served by using a higher viscosity fluid such as AMSOIL ATF. If you are doing a drain & refill, the ffirst one is about 44% new fluid replacement. The 3rd. one will take you to 85%. Think diloution rate vs. volume.

**Q: Can this work w/ toyota camry 1999 uses dexron iii? also, can i mix other brand dexron iii (not for hi mileage) w/ this castrol atf for high mileage?**
A: Yes and yes.  However, in my experience, Dexron VI (even in an old worn transmission) will dramatically improve shift quality even in transmissions rated for Dexron III or Toyota Type IV (which is rebranded Dexron IV).

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***I on 3 January 2026*

Fluid good. It was excellent.

### ⭐⭐⭐⭐⭐ Review
*by S***A on 12 February 2020*

So far I am highly impressed. I used this fluid on a 2009 Mitsubishi Lancer ES with 109k on it. This CVT fluid is a fraction of what the OEM JT1 fluid would cost. I did this with a pan drop and filter change as well. Thank you for other reviewers who noted that transmission shifted roughly after the change. That way I didn't lose it the first few miles thinking I had killed my CVT. I observed this too. Mine took about 30 miles to finally even out and now the change is dramatic. I must note I just got this car and I am not sure if fluid or filter was ever done but the CVT is transitioning between ratios much smoother now. I did have a lot of whine in my CVT before the change and I have not noticed any yet but I really have yet to take a long trip to warm the CVT enough to get the whine. I will try to update on my next long trip or the next change at 140k Miles Edit 1: about 1200 miles in a things are going well. I wanted to update that the CVT whine is gone. took a 2-hour drive to get good and warm but no whine like before. CVT is nice and quiet. Will update again if anything major happens before 140k Edit 2: CVT strikes This fluid is done by 22k miles. about 8k before recommended service. On a longer trip the whine came back and got a temp warning for transmission. Slowed down and it went away but checking fluid color is pretty bad and I have about 22k on fluid so going to change at every 20k now. I don't believe this is the fluid's fault I think this is just the nature of the CVT. CVT is still shifting good and no chattering just fluid is broken down quicker than expected. I do live in Texas and high heat may have added to this but not sure. I will how ever be using Castrol again as I think its doing pretty good so far.

### ⭐⭐⭐⭐⭐ Review
*by B***N on 29 May 2021*

2014 Nissan Rogue S (NS-3)had slipping issues. Complete drain and fill including flushing out the torque converter. Cycled the new fluid 400-500 km. Worked great! $35 quart at the stealership Yikes!

## Frequently Bought Together

- Castrol Transmax DEX/MERC ATF, 1 Gallon, Automatic, Black
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- Prestone AS401 DOT 3 Synthetic Brake Fluid - 32 oz.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-01-28*