Best Hydraulic Fluid Additives of 2026

David Davis Avatar
David Davis
Last Updated: Jan 11, 2026

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Hydraulic fluid additives are chemical compounds that are added to hydraulic fluids to enhance their performance and extend their lifespan. These additives are designed to improve the lubrication properties of hydraulic fluids, prevent corrosion and wear, reduce foam formation, and improve the overall efficiency of hydraulic systems. Some common hydraulic fluid additives include anti-wear agents, viscosity improvers, anti-foam agents, and rust inhibitors. By using hydraulic fluid additives, users can improve the performance and longevity of their hydraulic systems, ultimately reducing maintenance costs and downtime.

At a Glance: Our Top Picks

B3C Mechanic In A Bottle Hydraulic Oil Fix 24 oz Cover #TOP 1
B3C Mechanic In A Bottle Hydraulic Oil Fix 24 oz
ftb score rating icon 9.9
Mobil 102570 Automotive Accessories Cover #TOP 2
Mobil 102570 Automotive Accessories
ftb score rating icon 9.8
Liqui Moly Hydraulic Lifter Additive Cover #TOP 3
Liqui Moly Hydraulic Lifter Additive
ftb score rating icon 9.6

Top 10 Hydraulic Fluid Additives

#TOP 1

B3C Mechanic In A Bottle Hydraulic Oil Fix 24 oz

B3C Mechanic In A Bottle Hydraulic Oil Fix 24 oz Cover
Mechanic in A Bottle Hydraulic Oil Fix - 24 oz by B3C Fuel Solutions

B3C Hydraulic Oil Fix is designed to improve your hydraulic fluid's performance in multiple ways. It adds lubricity, which helps reduce friction and wear inside your machinery, extending its life. The product also provides anti-corrosion protection, keeping metal parts safe from rust and damage. Additionally, it neutralizes acids that can build up in hydraulic systems, preventing harmful effects and maintaining system health. This fix also encapsulates water in tiny particles, which helps reduce moisture-related issues in your hydraulic oil. Using this additive can help you keep your equipment running smoothly and avoid costly repairs.

What We Like
Improves lubrication
Protects against corrosion
Neutralizes harmful acids
Encapsulates water for moisture control
#TOP 2

Mobil 102570 Automotive Accessories

102570
Multicolor
Mobil 102570 Automotive Accessories Cover
Mobil 102570 Automotive Accessories, 5 gal.

This 5-gallon container of Mobil 102570 Automotive Accessories is perfect for auto and truck maintenance. The hydraulic fluid additive is made in the United States by MOBIL and includes a unit and instruction guide. It falls under the category of hydraulic fluid additives.

What We Like
Made in the United States by MOBIL
Includes a unit and instruction guide
5-gallon container is perfect for auto and truck maintenance
#TOP 3

Liqui Moly Hydraulic Lifter Additive

2770
Liqui Moly Hydraulic Lifter Additive Cover
Liqui Moly 20004 Hydraulic Lifter Addtive (12 Pack)

The Liqui Moly Lifter Additive is designed to enhance the performance of your vehicle's hydraulic lifters, ensuring smooth operation. Each package includes twelve 1-liter bottles, making it convenient for multiple uses. This additive is particularly beneficial for automotive applications, helping to restore and maintain optimal function in your engine. The bottles come with secure caps, allowing for easy storage and preventing spills, so you can keep your workspace neat while using this effective solution.

What We Like
Smooth engine operation
Convenient packaging
Ideal for automotive use
Prevent spills
#TOP 4

Duragard Arctic Blue Hydraulic Fluid - 2.5 Gallon Jug

DURARCBLUEJ
2.5 GALLON
Duragard Arctic Blue Hydraulic Fluid - 2.5 Gallon Jug Cover
Duragard Arctic Blue Hydraulic Fluid - 2.5 Gallon Jug

Duragard Arctic Blue Hydraulic Fluid is designed for extreme cold temperatures, providing smoother operation and reducing downtime by protecting against wear, rust, corrosion, sludge, and foaming. It also has excellent low temperature properties for use in arctic conditions and high dielectric strength making it ideal for electric service bucket trucks.

What We Like
Provides excellent frictional control for quiet and efficient hydraulic system operation.
Protects against wear, rust, corrosion, sludge, and foaming, reducing downtime.
Designed for use in extreme cold temperatures and arctic conditions.
#TOP 5

Lucas Oil Hydraulic Oil Booster and Stop Leak - 32 oz (Case of 12)

10019
Lucas Oil Hydraulic Oil Booster and Stop Leak - 32 oz (Case of 12) Cover
Lucas Oil 10019 Hydraulic Oil Booster & Stop Leak - 1 Quart (Pack of 12)

Introducing the Lucas Oil Hydraulic Booster - the perfect solution for your hydraulic fluid needs. This powerful formula is designed to stop leaks and prevent major overhauls, saving you time and money. With its advanced technology, it also reduces heat, ensuring optimal performance and extending the life of your equipment. Whether you're dealing with a small leak or a major issue, the Lucas Oil Hydraulic Booster has got you covered. Say goodbye to costly repairs and hello to a more efficient and reliable hydraulic system. Trust Lucas Oil to deliver the quality and performance you need.

What We Like
Stop leaks
Prevent major overhauls
Reduce heat
#TOP 6

OTC 4131A Hydraulic Ram

OTC
4131A
Blue
OTC 4131A Hydraulic Ram Cover
OTC 4131A Single Acting Hydraulic Ram (10-Ton)

The OTC Hydraulic Ram is designed for heavy-duty push and pull tasks in industries such as construction and mining. Its center hole allows you to easily extend screws or cables, providing added versatility for various applications. The chrome-plated piston rods are built to resist wear, ensuring durability during use. Additionally, the superior packing and seals help maintain a high cycle life without any leakage, which means you can rely on this tool for consistent performance. With a 10-ton capacity and a compact design, this hydraulic ram is an essential tool for handling heavy equipment maintenance.

What We Like
High load capacity
Versatile application
Durable construction
Leak-free operation
#TOP 7

Hapco Rack & Pinion Formula (2 Pack)

8542053490
Pack of 2
Hapco Rack & Pinion Formula (2 Pack) Cover
Hapco Products - Rack & Pinion Formula (Pack of 2)

The Hapco Steering Formula is designed to make your steering smoother by reducing stiffness with just one use, so you can enjoy easier control of your vehicle. It also protects your power steering system from damage caused by heat and wear, helping to extend the life of your car’s components. This product works with all types of power steering fluids, giving you the flexibility to use it regardless of your current setup. Plus, it’s made without petroleum distillates, which means it won’t harm the seals in your system, keeping everything safe and running well.

What We Like
Reduces steering stiffness
Protects against heat damage
Compatible with all fluids
Seal-friendly formula
#TOP 8

Liqui Moly Hydraulic Lifter Additive 2 Pack

20004
Liqui Moly Hydraulic Lifter Additive 2 Pack Cover
Hydraulic Lifter Addtive (2 Pack)

The Liqui Moly Lifter Additive helps reduce annoying hydro tappet noise, making your driving experience quieter. It also cleans the small lubrication channels in your engine’s oil system, ensuring smooth oil flow and better engine health. This additive supports the proper function of your hydraulic lifters, which helps maintain your engine’s performance. Overall, using Liqui Moly Lifter Additive can improve your vehicle’s reliability and provide a more comfortable ride, giving you peace of mind while on the road.

What We Like
Noise reduction
Oil circuit cleaning
Improved lifter performance
Enhanced vehicle reliability
Better travel comfort
#TOP 9

MechLink Hydraulic Quick Coupler for John Deere Models

AH225668 AH171017
MechLink Hydraulic Quick Coupler for John Deere Models Cover
MechLink 2pcs Hydraulic Quick Coupler AH225668 AH171017 AH225669 for John Deere 625D 630D 630FD 635D 635FD 640D 640FD 645FD 725D 730D 730FD 735D 735FD 740D 740FD 745FD New Aftermarket Parts

The MechLink Quick Coupler is designed to offer you a dependable and easy-to-use solution for your John Deere equipment. It provides stable performance, ensuring that your hydraulic connections remain secure during operation. You can count on its high reliability to reduce downtime and maintenance needs. The product includes one hydraulic quick coupler, making it convenient to replace or upgrade your current part. Plus, with a free repair, return, or exchange service under warranty, you get peace of mind knowing MechLink stands behind its product. Just be sure to check your part number before ordering to get the right fit for your machine.

What We Like
Stable performance
High reliability
Includes one coupler
Free repair or exchange
#TOP 10

Amwecwas 101-1323 Hydraulic Motor for Eaton Series

101-1323-009 101-1323 1011323009 1011323
Amwecwas 101-1323 Hydraulic Motor for Eaton Series Cover
101-1323-009 101-1323 1011323009 1011323 Hydraulic Motors Fits for Eaton Series Motor Replace

The Amwecwas Hydraulic Motor is designed to fit Eaton Series motors, making it an excellent replacement part for your hydraulic system. This motor comes with multiple part numbers to ensure compatibility, so you can easily verify if it matches your needs or contact the seller for assistance. It provides a reliable solution for maintaining or upgrading your equipment. Additionally, the product includes a 180-day warranty, giving you peace of mind and protection against defects. If you’re looking for a dependable hydraulic motor replacement, the Amwecwas Hydraulic Motor offers convenience and assurance for your machinery.

What We Like
Compatible with Eaton Series
Multiple part numbers available
Easy part verification
180-day warranty coverage
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are additives used in hydraulic fluids?

Additives commonly used in hydraulic fluids include hindered alkylphenols and alkyl substituted diarylamines. These additives serve as antioxidants to enhance the effectiveness of the fluid. Similar types of antioxidants are also utilized in other lubricants like crankcase and driveline oils.

2. What is one of the most important additives in hydraulic oil?

One of the most important additives in hydraulic oil is zinc dialkyl dithiophosphate (ZDDP). It is a common antiwear additive used in engine and hydraulic oils. However, it may not be ideal for certain metals or oil filtration systems.

3. Can I use ATF instead of hydraulic fluid?

In most cases, hydraulic systems can operate satisfactorily with various fluids. These include engine oil, automatic transmission fluid (ATF), and oils specifically formulated for hydraulics. However, it's important to check the manufacturer's recommendations for the specific hydraulic system.

4. What helps hydraulic oil to flow smoothly?

The viscosity of hydraulic fluid plays a crucial role in determining its flow characteristics and lubrication properties. The viscosity of the fluid affects how smoothly it flows through the hydraulic system.

5. Can you use WD 40 on hydraulics?

Using water displacement chemicals like WD-40 or CRC on hydraulic systems, specifically on rods or cylinders, is not recommended. These chemicals can cause swelling of urethane seals, leading to premature seal failure or cylinder jamming. If necessary, it is best to use a suitable soluble wax rust preventer.

Editor's Notes

During our hydraulic fluid additive research, we found 24 hydraulic fluid additive products and shortlisted 10 quality products. We collected and analyzed 3,144 customer reviews through our big data system to write the hydraulic fluid additives list. We found that most customers choose hydraulic fluid additives with an average price of $202.89.

The hydraulic fluid additives are available for purchase. We have researched hundreds of brands and picked the top brands of hydraulic fluid additives, including B3C Fuel Solutions, Mobil, Liqui Moly, Duragard, Lucas Oil. The seller of top 1 product has received honest feedback from 1,142 consumers with an average rating of 4.9.

Written by
David Davis Avatar

David Davis has rich experience as a mechanic and a general repairman in the automotive industry. It has given him plenty of knowledge in automobile repair, auto parts, and all kinds of tools. In his spare time, he enjoys assembling and disassembling parts for cars.