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expiredphoinix | Staff posted Jul 19, 2024 10:22 AM
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expiredphoinix | Staff posted Jul 19, 2024 10:22 AM

[S&S] $18.76: 6-Pack 1-Quart Castrol Transmax DEX/MERC Automatic Transmission Fluid at Amazon ($3.13 each)

$19

$41

53% off
Amazon
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Amazon [amazon.com] has 6-Pack 1-Quart Castrol Transmax DEX/MERC Automatic Transmission Fluid for $19.75 - 5% when you check out via Subscribe & Save = $18.76. Shipping is free with Prime or on $35+ orders.

Price:
$22.16 lower (54% savings) than the list price of $40.92

Subscribe & Save:
Tier5%15%
Price$18.76$16.79
Unit$3.13$2.80
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Customer reviews:
4.6⭐ / 80 global ratings
100+ bought in past month

amazon.com/dp/B008MISAXQ [amazon.com]

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Product Info
Community Notes
About the Poster
Amazon [amazon.com] has 6-Pack 1-Quart Castrol Transmax DEX/MERC Automatic Transmission Fluid for $19.75 - 5% when you check out via Subscribe & Save = $18.76. Shipping is free with Prime or on $35+ orders.

Price:
$22.16 lower (54% savings) than the list price of $40.92

Subscribe & Save:
Tier5%15%
Price$18.76$16.79
Unit$3.13$2.80
S&S deals / fillers [amazon.com]

Customer reviews:
4.6⭐ / 80 global ratings
100+ bought in past month

amazon.com/dp/B008MISAXQ [amazon.com]

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Model: Castrol Transmax DEX/MERC Automatic Transmission Fluid, 1 Quart, Pack of 6

Current Prices

Sort: Lowest to Highest | Last Updated 9/17/2025, 11:07 PM
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Amazon$43.02

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14 Comments

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Jul 20, 2024 02:43 PM
811 Posts
Joined May 2006
hbasavarJul 20, 2024 02:43 PM
811 Posts
Does this have the Toyota WS rating? If yes, then it would be ok to be put on any toyotas.
Jul 20, 2024 03:36 PM
163 Posts
Joined Jun 2017
bt8484Jul 20, 2024 03:36 PM
163 Posts
Quote from hbasavar :
Does this have the Toyota WS rating? If yes, then it would be ok to be put on any toyotas.
Do not use this in the WS world standard Toyota transmission!!!
Jul 20, 2024 04:20 PM
811 Posts
Joined May 2006
hbasavarJul 20, 2024 04:20 PM
811 Posts
Quote from bt8484 :
Do not use this in the WS world standard Toyota transmission!!!
Thank you... helps someone looking at this. I didn't think so either. Better off looking at Valvoline ATF which is on sale currently at $51 for 3 pack of 1 gallon. It is WS rated.
Jul 20, 2024 05:40 PM
188 Posts
Joined Mar 2019
DavidL1996Jul 20, 2024 05:40 PM
188 Posts
Quote from hbasavar :
Thank you... helps someone looking at this. I didn't think so either. Better off looking at Valvoline ATF which is on sale currently at $51 for 3 pack of 1 gallon. It is WS rated.
I've been using Valvoline in Toyotas and Lexus for years, zero issues.
Jul 20, 2024 05:43 PM
811 Posts
Joined May 2006
hbasavarJul 20, 2024 05:43 PM
811 Posts
Quote from DavidL1996 :
I've been using Valvoline in Toyotas and Lexus for years, zero issues.
Same here ... Easily available and rated clearly Toyota/Lexus vehicles and whole lot cheaper than the stealership branded oils which are really not from Toyota but contracted with Warren oil or some place to manufacture to some specs.
Last edited by hbasavar July 20, 2024 at 10:45 AM.
Jul 20, 2024 07:07 PM
43 Posts
Joined Jan 2015
dansu55Jul 20, 2024 07:07 PM
43 Posts
What vehicles can we use for this fluid?
Jul 20, 2024 07:33 PM
2,553 Posts
Joined Dec 2008
Marlin1975Jul 20, 2024 07:33 PM
2,553 Posts
Quote from dansu55 :
What vehicles can we use for this fluid?

This is for older transmissions that use Dex3 fluid, think around early 2000's and older.
You can use in newer vehicles for steering fluid, except Honda.

Even then I like their HM version for older Dex3 trans.

https://www.amazon.com/Castrol-03...6Q91A?th=1
Last edited by Marlin1975 July 20, 2024 at 12:36 PM.

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Jul 20, 2024 11:52 PM
2,165 Posts
Joined Apr 2006
Vinny2006Jul 20, 2024 11:52 PM
2,165 Posts
Quote from DavidL1996 :
I've been using Valvoline in Toyotas and Lexus for years, zero issues.
Same. Used in Highlander and multiple Lexus RX350. Never an issue and it is synthetic too. Peeps should go read up in Bob is the Oil Guy before telling people not to use Valvoline ATF with Toyota WS approval in their Toyota and Lexus..
1
Jul 21, 2024 04:54 AM
3,877 Posts
Joined Oct 2011
racebumJul 21, 2024 04:54 AM
3,877 Posts
Quote from hbasavar :
Does this have the Toyota WS rating? If yes, then it would be ok to be put on any toyotas.
This is a GM product. If you need WS you can get aisin ws fluid. Toyota ws or the only aftermarket general fluid that has been used successfully in WS transmissions for over a decade is Valvoline max life. It has the correct rating and it also has the history
Jul 21, 2024 09:28 PM
323 Posts
Joined Oct 2013
GoldenDadJul 21, 2024 09:28 PM
323 Posts
One thing I've learned in 30 years of working on cars: always use oem tranmission fluid.
I tried to get by with using cheaper aftermarket fluid and it lead to slipping/odd shift behavior. Then you have to flush it out and replace it with oem. Twice the work and expense. Not worth the risk.
I'll use aftermarket filters, oil, parts etc but trans fluid is the one thing that I'm convinced needs oem in modern vehicles.
Jul 22, 2024 02:13 AM
615 Posts
Joined Jan 2015
LongnskinnyJul 22, 2024 02:13 AM
615 Posts
Quote from dansu55 :
What vehicles can we use for this fluid?
American cars
Jul 23, 2024 05:11 PM
64 Posts
Joined Dec 2021
RevolukasJul 23, 2024 05:11 PM
64 Posts
Can i use this in a power steering system that requires ATF Dexron VI?
Jul 23, 2024 06:43 PM
488 Posts
Joined Nov 2017
drzkJul 23, 2024 06:43 PM
488 Posts
Quote from GoldenDad :
One thing I've learned in 30 years of working on cars: always use oem tranmission fluid.
I tried to get by with using cheaper aftermarket fluid and it lead to slipping/odd shift behavior. Then you have to flush it out and replace it with oem. Twice the work and expense. Not worth the risk.
I'll use aftermarket filters, oil, parts etc but trans fluid is the one thing that I'm convinced needs oem in modern vehicles.
Toyota WS is unusual as an OEM fluid which is inferior in blend. There are a handful of superior WS rated synthetics. Valvoline just happens to be easy to find.
Jul 24, 2024 07:44 AM
1,677 Posts
Joined Aug 2007
munkleJul 24, 2024 07:44 AM
1,677 Posts
Quote from GoldenDad :
One thing I've learned in 30 years of working on cars: always use oem tranmission fluid.
I tried to get by with using cheaper aftermarket fluid and it lead to slipping/odd shift behavior. Then you have to flush it out and replace it with oem. Twice the work and expense. Not worth the risk.
I'll use aftermarket filters, oil, parts etc but trans fluid is the one thing that I'm convinced needs oem in modern vehicles.
A lot of the cars this goes in probably don't even have OEM fluid still available. I know for two of my cars that use this the OEM fluid is discontinued, and the newer OEM fluids that superspeed the original fluid are lower viscosity fluids than the original.

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