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ZMAX 51-306 - Transmission Formula - for Automatic and Manual Transmissions - Reduces Carbon Build-Up - Lubricates Metal and Gears - Keeps Seals Supple - Improves Shifting Performance - 6 oz.

4.7 4.7 out of 5 stars 700 ratings
$13.69 $2.28 per Ounce
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Purchase options and add-ons

Brand zMAX
Liquid Volume 6
Item Weight 7.97 Ounces

About this item

  • PROTECT YOUR VEHICLE: zMAX Transmission Formula is easy to use! Micro-lubrication soaks into metal surfaces improving lubrication to reduce gear wear and varnish buildup. Keeps seals supple, preventing leaks and improving shifting.
  • TRANSMISSION EFFICIENCY: Improve performance by adding the formula to your transmission fluid to reduce slippage and rough shifting. Brings back smooth shifting gears resulting in an improved response. Add every time you change your transmission fluid.
  • TRANSMISSION LUBRICANT: Cleans varnish for smoother shifting and lubricates bearings, gears, and the hydraulic system. Perfect for both automatic or manual transmissions. Not for use in CVT transmissions. Does not void manufacturer's warranties.
  • ECONOMICAL PREVENTATIVE MAINTENANCE: Pour into transmission fluid to keep the gears lubricated and in top condition. The eco-friendly formula is industry tested, mechanic trusted and improves the performance and the driving experience.
  • TRUSTED QUALITY AND PERFORMANCE: zMAX is proud to be the Official Micro-lubricant of Speedway Motorsports. Trusted for over 80 years, the USA made Transmission Formula saves money at the pump and extends the engine life of all your vehicles.
› See more product details

Frequently bought together

ZMAX 51-306 - Transmission Formula - for Automatic and Manual Transmissions - Reduces Carbon Build-Up - Lubricates Metal and
$13.69 ($2.28/Ounce)
Get it as soon as Monday, May 13
In Stock
Sold by GlobalEcom and ships from Amazon Fulfillment.
+
zMAX 51-011 - Engine & Fuel Formula Kit - Easy to Use - Reduces Carbon Build-Up & Lubricates Metal Extending Life of Car or T
$36.30
Get it as soon as Monday, May 13
In Stock
Sold by GlobalEcom and ships from Amazon Fulfillment.
+
zMAX 51-106 Fuel Formula - Easy to Use - Engine Treatment Reduces Carbon Build-Up & Lubricates Metal Extending Life of Car or
$14.99
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In Stock
Sold by GlobalEcom and ships from Amazon Fulfillment.
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Product Description

Close-up of zMAX Transmission Formula bottle with visible product details.
Transmission system infographic detailing how zMAX improves gear lubrication
Zmax
Transmission Formula

Gear Up Your Ride

Transmission

Application Area

Multi-Purpose

6 oz

Volume (oz)

32 oz

Automatic/Manual

Type of Use

A/M + Power Steering

Gas/Diesel

Engine Type

Gas/Diesel

Improves Efficiency

Carbon Reduction

Lubricates Metal

Transmission

Application Area

Engine

6 oz

Volume (oz)

12 oz

Automatic/Manual

Type of Use

Engine

Gas/Diesel

Engine Type

Gas/Diesel

Improves Efficiency

Carbon Reduction

Lubricates Metal

Transmission

Application Area

Small Engine

6 oz

Volume (oz)

12 oz

Automatic/Manual

Type of Use

2/4-cycle Engines

Gas/Diesel

Engine Type

Gas/Diesel

Improves Efficiency

Carbon Reduction

Lubricates Metal

Transmission

Application Area

Fuel Treatment

6 oz

Volume (oz)

12 oz

Automatic/Manual

Type of Use

Fuel System

Gas/Diesel

Engine Type

Gas/Diesel

Improves Efficiency

Carbon Reduction

Lubricates Metal

Learn More
Learn More
Learn More
Learn More

Smooth, Sustainable, and Smart Solutions with zMAX Transmission Formula

Product information

Technical Details

Additional Information

Warranty & Support

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Product Warranty: For warranty information about this product, please click here

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ZMAX 51-306 - Transmission Formula - for Automatic and Manual Transmissions - Reduces Carbon Build-Up - Lubricates Metal and Gears - Keeps Seals Supple - Improves Shifting Performance - 6 oz.

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What's in the box

  • zMAX 51-306 - Transmission Formula - for Automatic and Manual Transmissions - Reduces Carbon Build-Up - Lubricates Metal and Gears - Keeps Seals Supple - Improves Shifting Performance - 6 oz.

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    ZMAX 51-306 - Transmission Formula - for Automatic and Manual Transmissions - Reduces Carbon Build-Up - Lubricates Metal and Gears - Keeps Seals Supple - Improves Shifting Performance - 6 oz.
    ZMAX 51-306 - Transmission Formula - for Automatic and Manual Transmissions - Reduces Carbon Build-Up - Lubricates Metal and Gears - Keeps Seals Supple - Improves Shifting Performance - 6 oz.
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    Added to Cart
    Price$13.69$13.85-52% $13.98
    List: $29.18    		$15.95$22.32$35.93
    Delivery
    Get it as soon as Monday, May 13
    Get it as soon as Saturday, May 11
    Get it as soon as Saturday, May 11
    Get it as soon as Saturday, May 11
    Get it as soon as Saturday, May 11
    Get it as soon as Saturday, May 11
    Customer Ratings
    4.74.7 out of 5 stars700
    4.74.7 out of 5 stars994
    4.64.6 out of 5 stars6,041
    4.54.5 out of 5 stars2,645
    4.64.6 out of 5 stars1,334
    4.74.7 out of 5 stars290
    Value for money
    4.7
    4.6
    4.5
    4.6
    4.2
    4.7
    Mileage
    4.5
    4.6
    4.4
    4.3
    4.2
    4.7
    Easy to use
    —
    4.8
    4.6
    4.8
    4.6
    5.0
    Sold By
    GlobalEcom
    Amazon.com
    Amazon.com
    B and S Supply
    Amazon.com
    G.P.S.
    liquid volume
    —
    1 fluid ounces
    24 fluid ounces
    2 fluid ounces
    0.24 liters
    2 fluid ounces
    form
    —
    Oil
    Liquid
    Liquid
    —
    Liquid
    weight
    7.97 ounces
    0.55 pounds
    0.72 kilograms
    4.5 ounces
    8 ounces
    0.11 pounds

    Looking for specific info?

    Customer reviews

    4.7 out of 5 stars
    4.7 out of 5
    700 global ratings

    Customers say

    Customers like the performance, smoothness, quality and value of the machine lubricant. They mention that it works well in all vehicles, makes shifting smoother and is worth the purchase.

    AI-generated from the text of customer reviews

    35 customers mention35 positive0 negative

    Customers are satisfied with the performance of the lubricant. They mention that it works well in a manual transmission, and in all vehicles. Some say that it helps the transmission a lot, and that it runs better.

    "Helps to slick up transmission to send more revolutions to the wheels . Helps smooth out transmission...." Read more

    "Seems to work, no transmission issues, when cold I've noticed that the slightly harsh shift from 1st up to second has all but disappeared...." Read more

    "...it runs better!" Read more

    "...this product in a ls4 front wheel drive gm w body lacrosse and it works great!" Read more

    26 customers mention26 positive0 negative

    Customers like the smoothness of the lubricant. They say it makes the transmission shift smoother instantly. Some customers also mention that the hard shifting has stopped and the car shifts beautifully now.

    "...Helps smooth out transmission. I have been using zmax for years and have only had good results like the engine runs about 15 degrees cooler." Read more

    "After adding Z-Max transmission fluid to my Lexus it began to shift smoother and quicker than before...." Read more

    "...I put this stuff in and now it just slips into gear smooth as a baby's bottom. Highly recommend this product!!!!" Read more

    "...The results were almost immediate. The car runs smooth and gets better mileage. My best mistake." Read more

    18 customers mention18 positive0 negative

    Customers are satisfied with the quality of the machine lubricant. They mention it's an outstanding, proven product that performs great. Some customers also say that the tips are cheaply made.

    "...Good product, one of the few additives I would recommend. Most don't work but this product does." Read more

    "...Great product." Read more

    "Proven product, preserves transmission reliability, keeps seals reliable from leaking." Read more

    "...100% no B.S. just good quality products!!" Read more

    12 customers mention12 positive0 negative

    Customers appreciate the value of the machine lubricant. They say it works well, is great for a good price, and is easy to maintain.

    "Great product good price point for what it does!!" Read more

    "...This stuff is amazing. I also use it in my oil and fuel periodically. Interesting fact, all Zmax is the same, just color coded for different uses...." Read more

    "Great product for a good price" Read more

    "Well worth the money. Made a,huge difference" Read more

    Always use it and continue to use it Zmax for life
    5 Stars
    Always use it and continue to use it Zmax for life
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    Top reviews from the United States

    James M.
    5.0 out of 5 stars Better performance
    Reviewed in the United States on April 22, 2024
    Size: Pack 1Verified Purchase
    Helps to slick up transmission to send more revolutions to the wheels . Helps smooth out transmission. I have been using zmax for years and have only had good results like the engine runs about 15 degrees cooler.
    Helpful
     Report
    K1manbmw
    5.0 out of 5 stars Smoother shifting
    Reviewed in the United States on April 16, 2024
    Size: Pack 1Verified Purchase
    After adding Z-Max transmission fluid to my Lexus it began to shift smoother and quicker than before. The car has 145,000 miles and it shifts like new again.
    Helpful
     Report
    Michelle L Edwards
    5.0 out of 5 stars Great!!
    Reviewed in the United States on May 1, 2024
    Size: Pack 2Verified Purchase
    I received them on time and in tact. I love Z-Max products for my cars!
    Helpful
     Report
    David Heidler
    4.0 out of 5 stars Works!!!!
    Reviewed in the United States on May 22, 2017
    Size: Pack 1Verified Purchase
    Seems to work, no transmission issues, when cold I've noticed that the slightly harsh shift from 1st up to second has all but disappeared. Once vehicle has warmed up you hardly notice the transmission shifting at all. Good product, one of the few additives I would recommend. Most don't work but this product does.
    5 people found this helpful
    Helpful
     Report
    Triipzz21
    5.0 out of 5 stars Really works!!!
    Reviewed in the United States on March 20, 2024
    Size: Pack 1Verified Purchase
    Bought a used car transmission fluid was never changed. Added this and all my shifting issues that was making the car sluggish worked changed the transmission fluid first!
    One person found this helpful
    Helpful
     Report
    Robert walker
    5.0 out of 5 stars Z- Max is the Best Treatment to Use
    Reviewed in the United States on February 19, 2024
    Size: Pack 1Verified Purchase
    I Put Z-Max in all of my Vehicles I Own. I do it every 6 Months
    One person found this helpful
    Helpful
     Report
    mario
    5.0 out of 5 stars Great stuff
    Reviewed in the United States on July 13, 2023
    Size: Pack 1Verified Purchase
    This really works one time I had a oil change the person forgot to put oil back in my truck. I when home with it all of a sudden the oil light came on. I pull over NO oil ! So I got oil and my engine was still perfect.
    2 people found this helpful
    Helpful
     Report
    Chris Osborne
    5.0 out of 5 stars Works great.
    Reviewed in the United States on July 15, 2021
    Size: Pack 1Verified Purchase
    We have a 2014 GMC Acadia with around 109k miles. We purchased it used and when i got it i noticed the trans fluid had yet to be replaced. So i did a flush and the transmission improved 90%. However, 1 to 2 and 2 to 3 was a little hard shifting, not bad but i knew it shifted smoother than what it was doing. So i got ZMAX which ive used before in my oil, but never in a transmission. Needless to say it cleaned the shift points up perfectly. After driving around for about 30 min it was already shifting snoother. After my wife drove it back and forth to work for a couple days its now like new. Super happy with this product. This is not a product thats going to fix mechanical issues. But i believed my issue was just a varnish issue around the solenoid actuators where the oil had not been replaced. GM recommends every 40k miles on trans oil. So yeah if your having a little harder shifts then your used too. Get this and it will clean it up. You dont need to pull any oil out, just add the product and drive, its that simple. In about 1000 miles the product will fully soak in to all the metal and clean and lubricate varnish points. This product is not designed to fix worn out trans parts. So dont bother because it will leave a bad taste in your mouth. It simply soaks into the metal, allowing varnish or carbon to not adhere to the metal services. Look into Prolong or Bestline products if you need to treat a worn out transmission.
    8 people found this helpful
    Helpful
     Report

    Top reviews from other countries

    marctbo
    5.0 out of 5 stars All Zmax additives are #1
    Reviewed in Canada on February 8, 2024
    Size: Pack 2Verified Purchase
    I use Zmax engine, trany and fuel additives all the time in my 2012 Dodge Ram with the Hemi which has over 264,000km on it! And this Hemi still runs and performs great! I've been using Zmax for years for all my vehicles and it has never let me down! My vehicles run forever! I add these additives every 2nd or 3rd oil change...I add every 2nd oil change since it rolled over 250,000km! This stuff doesn't just coat the metal like all other additives, it soaks into the metal which makes it last longer and run smoother!
    Report