Best Engine & Oil Fluid Additives (Aug. 2026) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

Rislone High Mileage 4 6 8 Compression Repair, 16.9 oz.

9.9
CPR Score
Top 2

Rislone 4405 Engine Oil Supplement Concentrate with Zinc Treatment - 11 oz, Y...

9.7
CPR Score
Top 3

Bar's Leaks High Mileage Engine Repair, 16.9 oz

9.6
CPR Score
Tips


Below is a list of the top 30 best Engine & Oil Fluid Additives. Our team has selected the top products by analyzing and evaluating 306 products of different Oils & Fluids brands, including Generic, Lucas Oil, Liqui Moly, Bar's Leaks, Motul, STP, Rislone, REV X, Marvel Mystery Oil And Slick 50. Hope this listing can make your shopping choice much easier.

* CherryPicks.Reviews is reader-supported, Our editor review, and recommend the best products based on extensive data analysis, if you click on the product links, we may earn a commission through qualifying products purchased.

The Best Engine & Oil Fluid Additives Rated by CherryPicks

Market Overview
Engine & Oil Fluid Additives Reviewed
  • Reviews Analyzed: 81,502 Items
  • CPR Avg. Rating: 8.5 / 10
30 Products Evaluated
  • Highest Price: $65.95
  • Lowest Price: $4.98
  • Avg. Price: $21.77
Price Disclaimer

Top 30 Engine & Oil Fluid Additives on Amazon (Verified You can Buy)

Rislone High Mileage 4 6 8 Compression Repair, 16.9 oz.

Bar's Leaks
4447
2.6 x 2.6 x 7.4 inches
0.35 Pounds

Ratings for Bar's Leaks (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
VerSure 160

Features

Restores lost compression
Repairs blow-by
Show More

Rislone 4405 Engine Oil Supplement Concentrate with Zinc Treatment - 11 oz, Yellow

Rislone
4405
1.8 x 3.0 x 6.6 inches

Ratings for Rislone (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Prevents Camshaft Wear
Reduces Piston Scuffing
Show More

Bar's Leaks High Mileage Engine Repair, 16.9 oz

Bar's Leaks
1000
7.41 x 2.85 x 1.35 inches
1.05 pounds

Ratings for Bar's Leaks (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Increases Oil Pressure
Reduces Friction
Show More

Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise, Vibration - Boosts Fuel Economy & Horsepower - Works on Transmissions & Differentials (1QT)

Prolube

Ratings for Prolube (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Prolube Oil LLC -

Features

POWER UP ENGINE, CUT THE NOISE: Maximize your engine’s overall performance with Prolube oil additive. It increases horsepower, reduces engine noise, smooths vibrations, and ensures your engine runs quieter and more efficiently under daily driving or heavy-duty conditions.
SAVE ON FUEL COST: Reduce fuel consumption and improve efficiency with Prolube oil treatment. Its advanced formula decreases friction between engine components, optimizes performance, prevents overheating, and allows your engine to run smoother while saving on fuel over time.
Show More

Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart

Lucas Oil
10001
10.12 x 3.14 x 2.67 inches
0.9 pounds

Ratings for Lucas Oil (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Extends oil and engine life
Virtually eliminates dry starts and excessive wear
Show More

Certified Auto Pro Oil and Fuel System UV Dye Leak Detection for Cars & Trucks & More, 1 Oz, 374CS, Universal

A/C Pro
374CS
0.0 x 0.0 x 0.0 inches
0.1 pounds

Ratings for A/C Pro (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Contains one application of oil and fuel system UV leak detection dye
For use in engine oil transmissions power steering systems and gas and diesel fuel systems
Show More

Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise, Vibration - Boosts Fuel Economy & Horsepower - Works on Transmissions & Differentials (6oz)

Prolube

Ratings for Prolube (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Prolube Oil LLC -

Features

POWER UP ENGINE, CUT THE NOISE: Maximize your engine’s overall performance with Prolube oil additive. It increases horsepower, reduces engine noise, smooths vibrations, and ensures your engine runs quieter and more efficiently under daily driving or heavy-duty conditions.
SAVE ON FUEL COST: Reduce fuel consumption and improve efficiency with Prolube oil treatment. Its advanced formula decreases friction between engine components, optimizes performance, prevents overheating, and allows your engine to run smoother while saving on fuel over time.
Show More
Top 8

STP High Viscosity Oil Treatment (15 fluid ounces)

STP
65148
6.2992 x 3.1496 x 8.2677 inches
0.8688 Pounds

Ratings for STP (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Contains zinc anti-wear agent ZDDP that fights metal-to-metal friction
Reduces oil consumption
Show More

Lucas Oil 10130 Pure Synthetic Oil Stabilizer - 1 Quart

Lucas Oil
LUC10130
12.0 x 3.3 x 3.3 inches
1.96 Pounds

Ratings for Lucas Oil (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

World’s #1 synthetic oil additive
Light, slick, and long-lasting with exceptional film strength
Show More

REV X ZDDP Oil Additive - Zinc & Phosphorus

REV X
ZINC0201
1.25 x 1.25 x 4.25 Inches
0.15 pounds

Ratings for REV X (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Rev X Products, Inc. -

Features

Creates an anti-wear layer at friction points to prevent metal-to-metal contact and eliminate wear.
Engine break-in where the new camshaft and lifters need extra protection, and ZDDP is perfect for that.
Show More
Top 11

REV X Stiction Fix Oil Treatment - Two 4 fl. oz. Bottles

REV X
REV0402
3.5 x 2.0 x 3.75 inches
0.5 pounds

Ratings for REV X (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Rev X Products, Inc. -

Features

Two 4 fl. oz. bottles of REV X High Performance Oil Additive in our stiction fix retail box. Will treat up to 12 quarts of oil.
Quiets engine noise while cleaning harmful deposits, varnish and sludge in all engines. Reduces friction by creating a microscopic friction reduction layer on all treated components to reach areas standard oils can not.
Show More
Top 12

Rislone 4102 Xtreme LUBE® Maximum Performance Engine Treatment, 16.9 oz, 5-Pack

Rislone
4102-5PK
7.6 x 3.4 x 1.9 inches

Ratings for Rislone (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

REDUCES FRICTION AND WEAR: Multi-grade formula allows the oil to flow freely and provides protection over a broader temperature range
REMOVES AND PREVENTS SLUDGE: XTREME LUBE Maximum Performance removes sludge and other harmful deposits within engines that can alter tolerances, stick rings, cause noisy valves & lifters, and plug oil passages and screens
Show More
Top 13

Graphenoil Graphene Engine Treatment – Friction Modifier, Wear Protection, Heat Reduction – High Performance Lubrication (16 oz)

Graphenoil
LM16
1.5 x 5.0 x 8.5 inches

Ratings for Graphenoil (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Graphenoil -

Features

ADVANCED GRAPHENE TECHNOLOGY – Graphenoil uses cutting-edge graphene to reduce friction at the molecular level, helping protect critical engine components and improve lubrication performance.
REDUCES WEAR & EXTENDS ENGINE LIFE – Creates a protective layer that minimizes metal-on-metal contact, helping extend engine life and reduce long-term wear.
Show More
Top 14

BestLine Racing Diamond Nano-Lube Engine Oil Treatment (12 ounce)

DNL
BLR-ETA-12SW
8.0 x 3.5 x 2.0 Inches

Ratings for DNL (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
BestLine -

Features

Reduces friction by approximately 60% compared to conventional engines, by forming an ultra-low friction film on top of the Diamond Nano-coating.
Use for any type of vehicle from go carts to commercial trucks and everything in between.
Show More
Top 15

Motul Engine Clean | Oil Additive & Flush for Gasoline & Diesel Engines | Helps Remove Sludge & Improve Oil Flow | Supports Emission System Care & Engine Protection | 300ml

Motul
112299
7.4803 x 2.0472 x 2.0472 inches
0.3968 pounds

Ratings for Motul (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Virgo_Premier -
DMPTradingCompany -

Features

Simple and Effective Deep Cleaning for Any Engine: Transform your regular oil change with Motul Engine Clean. This additive-based engine flush works with gasoline, diesel, turbocharged, naturally aspirated, and hybrid engines. Simply pour it in before draining your oil, let your engine idle for 15 minutes, and help loosen years of deposits, sludge, and varnish. Ideal for daily drivers, motorcycles, or high-mileage vehicles. This proactive treatment resets internal engine conditions for smooth performance without changing your routine.
Engine Sludge Treatment for Maximum Efficiency: Motul Engine Clean’s detergent-based formula helps dissolve stubborn residues, oil sludge, and combustion by-products. It improves fuel economy, supports consistent compression, and helps maintain smooth engine operation. By cleaning components like piston rings, lifters, and turbo oil lines, it promotes oil flow and reduces friction - key factors in enhancing engine longevity and oil temperature stability.
Show More

Bar's Leaks Oil Seal Engine Oil Burning and Leak Repair

Bar's Leaks
OS-1
10.0 x 11.0 x 4.0 inches
1.1 Pounds

Ratings for Bar's Leaks (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
VerSure 160
Amazon Resale -

Features

This Premium Quality Synthetic Blend Works With All Types Of Motor/Engine Oil Including Regular Petroleum, High Mileage, Synthetic Blends And Fully Synthetic Formulas
Works In All Gasoline And Diesel Engines Including Turbocharged, Eco Boost, Hybrid And Even Racing Engines, Including 3, 4, 5, 6, 8 And 10 Cylinder Engines In All Cars, Trucks, Vans And Suv'S
Show More
Top 17

REV-X Zinc ZDDP Oil Additive - 2 fl. oz. (5 Pack)

REV X
ZINC0201
1.25 x 1.25 x 4.25 inches
0.15 Pounds

Ratings for REV X (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Rev X Products, Inc. -

Features

Creates an anti-wear layer at friction points to prevent metal-to-metal contact and eliminate wear.
Engine break-in where the new camshaft and lifters need extra protection, and ZDDP is perfect for that.
Show More

Marvel Mystery Oil 53835 Synthetic Motor Treatment, Removes and Prevents Sludge Build Up and Leaks, Increases Life of Engine, Extends Oil Change Intervals and Mileage, 16 oz. (Pack of 1)

Marvel Mystery Oil
53835

Ratings for Marvel Mystery Oil (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Advanced Engine Protection - A motor treatment additive for synthetic oils that provides superior protection on vital components, reducing wear and tear to extend the life and reliability of your engine, minimizing costly repairs and maintenance over time
Enhanced Performance - Actively dissolves sludge deposits and prevents future build up for smoother, more efficient engine performance
Show More

Rislone High Mileage Engine Treatment

Rislone
4102
1.9 x 3.4 x 7.6 inches

Ratings for Rislone (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Bicyclingfanatic -
cookie's store LLC -

Features

Reduces friction and wear
Quiets noisy lifters and valves
Show More
Top 20

Marvel Mystery Oil Original Motor Treatment, Engine Oil & Fuel Treatment Additive, Cleans and Lubricates Fuel System, Prevents Leaks, Improves Engine Performance and Fuel Economy, 32 oz. (Pack of 6)

Marvel Mystery Oil
50095-6PK
4.5 x 2.25 x 10.25 inches
2.01 pounds

Ratings for Marvel Mystery Oil (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

TRUSTED FOR 100 YEARS: Working as both a fuel additive & oil additive, our original formula cleans, lubricates and protects critical engine components to keep your car running smoother and longer
ENGINE CLEANER & PROTECTOR: Delivers a protective lubricating film that reduces friction, wear and corrosion inside your engine, extending the life of pistons, cylinders and valves
Show More

Slick 50 Original Classic Engine Treatment with Ceramic Cerflon PTFE, SL-750017, 32 fl. oz, 1 Pack, White

Slick 50
SL-750017
3.0 x 4.0 x 9.0 inches
2.0 pounds

Ratings for Slick 50 (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
DealsDelivered 9,591
Fretail, LLC -

Features

Protects against power robbing friction and heat
Enhances oil durability
Show More
Top 22

LIQUII MOLY 20004 Hydraulic Lifter Additive 300 ml - (2 Pack)

Generic
2770

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
STRATO HEALTH LIMITED -

Features

Improves the lubrication properties of the oil
Cleans valve bores
Show More
Top 23

Liqui Moly 20288 Hybrid Additive, 1 L, 1 Pack

Liqui Moly
20288
6.75 x 4.0 x 4.0 inches

Ratings for Liqui Moly (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
World Brands 305 -
The Collectors Spot -
Amazon.com -

Features

Removes deposits and protects against corrosion
Stabilizes the fuel and protects against aging and oxidations
Show More
Top 24

Lucas Oil 11100 Engine Oil Stop Leak - Top Off Additive - 1 Quart

Lucas Oil
11100
4.35 x 2.42 x 9.0 inches
0.0006 pounds

Ratings for Lucas Oil (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Vera Tools 5,312

Features

Long lasting
Conditions seals and o-rings to stop oil leaks
Show More

LIQUI MOLY Oil Additive Cera Tec 3721 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Performance, Less Friction & Lower Fuel Consumption 300 ml

Liqui Moly
03721
2.5 x 1.0 x 3.0 inches
0.6614 Pounds

Ratings for Liqui Moly (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Onogo US 3,039
Amazon.com -
Impart Auto Parts -
Edo Performance -
Mabits -
Amazon Resale -
STRATO HEALTH LIMITED -
TRADEGROUP-USA -
SSM Pharma -
VanMark Deals 6,895
HappyHarryUS -

Features

Mixable with all commercially available motor oils
Stable even under high thermal and dynamic permanent loads
Show More
Top 26

Lucas Oil 10599 Anti-Squawk/Anti-Shudder Additive - 16 Ounce

Lucas Oil
10599
2.47 x 2.47 x 9.375 inches
1.0221 Pounds

Ratings for Lucas Oil (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
B and S Supply 6,012
Amazon Resale -
Amazon.com -

Features

For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
Excellent on track performance
Show More

LIQUI MOLY Motor Oil Saver | 300 ml | Oil additive | SKU: 2020

Liqui Moly
2020
0.0 x 0.0 x 0.0 inches
0.72 pounds

Ratings for Liqui Moly (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
VerSure 160
Amazon.com -
AD Distribution. -

Features

Reduces oil consumption via the piston rings and valve guides
Prevents blue, smoky exhaust fumes
Show More
Top 28

Bardahl 10208 B1 Oil Supplement Additive - Motor Oil Enhancement to Increase Lubrication and Reduce Friction in New Vehicles - 12 fl. oz. (Pack of 1)

Bardahl
10208
2.5 x 2.5 x 7.25 inches
0.7688 Pounds

Ratings for Bardahl (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Bardahl -

Features

Reduces engine friction and wear and improves fuel economy
Restores power and enhances performance in cars, trucks, farm vehicles and industrial equipment
Show More
Top 29

Tracer Products TP-3090-0601 Gas Engine Oil dye, 1 Pack

TRACER
TP-3090-0601
3.7 x 2.7 x 3.4 inches
0.2 Pounds

Ratings for TRACER (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
JBTools 308
Amazon.com -
Tooldom Tools -
Amazon Resale -

Features

Gasoline engine oil dye, 1 oz. bottle, 6 pack
Produced with the highest grade materials
Show More
Top 30

LiquiMoly 3721 Engine Oil Additive

Liqui Moly
3721
7.0079 x 0.0 x 0.0 inches
1.4991 Pounds

Ratings for Liqui Moly (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
SSM Pharma -
Mabits -
Smash It -

Features

Single Quantity
No Core Charge Req
Show More

Top 10 Engine & Oil Fluid Additives - Verified to Buy (August 2026)

Top 10 Engine & Oil Fluid Additives Brands on Amazon

Here is the list of top-rated brands that were evaluated by CherryPicks.

  • Bar's Leaks
  • Rislone
  • Prolube
  • Lucas Oil
  • A/C Pro
  • STP
  • REV X
  • Graphenoil
  • DNL
  • Motul

Top 10 Engine & Oil Fluid Additives Sellers: CPR Seller Rank List

CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.

Rank Name Yearly Feedbacks Avg. Ratings
🥇 VerSure 208,191 4.9
🥈 JBTools 125,376 4.8
🥉 Onogo US 20,327 4.5
4 Vera Tools 12,377 4.8
5 B and S Supply 11,082 4.7
6 VanMark Deals 9,763 4.9
7 DealsDelivered 7,070 4.8
8 Edo Performance 6,666 4.8
9 Tooldom Tools 3,433 4.8
10 Bicyclingfanatic 2,762 4.7
View or download top Engine & Oil Fluid Additives seller & rating report
VerSure [208191] JBTools [125376] Onogo US [20327] Vera Tools [12377] B and S Supply [11082] VanMark Deals [9763] DealsDelivered [7070] Edo Performance [6666] Tooldom Tools [3433] Bicyclingfanatic [2762] VerSure 51% JBTools 31% Onogo US 5% Vera Tools 3% B and S Supply 3% VanMark Deals 2% DealsDelivered 2% Edo Performance 2% Tooldom Tools 1% Bicyclingfanatic 1%

[Get] Engine & Oil Fluid Additives Deals (✅Exclusively for Prime)

What does "Amazon Fulfilled" Mean?

Amazon Fulfilled refers to products handled by Amazon's logistics, which indicates that the product is stored, packed, and shipped by Amazon from one of its fulfillment centers.

When you order a product that is "Amazon Fulfilled," Amazon takes care of the storage, packing, shipping, and customer service for that product. This often ensures quicker delivery and better customer service compared to products that are not fulfilled by Amazon. It also means that the product is eligible for Amazon's return policy.

What does "Prime" Mean?

"Prime" refers to Amazon Prime Member (Join Amazon Prime Now), which indicates eligibility for Prime benefits. When you see "Prime" next to a product on Amazon, This generally means that if you are  an Amazon Prime member, you can get free two-day shipping on that product, and sometimes even same-day or one-day shipping depending on your location.

Prime members also have access to other benefits, including 2-Day ShippingExclusive Member DealsPrime VideoBuy With PrimeAmazon MusicPrime Gaming, and more.

Shop Prime Engine & Oil Fluid Additives Deals

What does "Free Shipping" Mean?

"Free Shipping" means that you will not be charged additional fees for the shipping of that product. However, unlike "Prime," which usually guarantees fast two-day shipping, "Free Shipping" doesn't necessarily mean fast shipping.

Sometimes there might be a minimum purchase requirement to qualify for free shipping if you are not a Prime member. For Prime members, the "Free Shipping" usually refers to the free two-day shipping that is one of the benefits of the Prime membership.


Why Should You Trust Us?

Now hundreds and thousands of Oils & Fluids supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best Engine & Oil Fluid Additives to buy for new August 2026?

CherryPicks’s Methodology for Evaluating Engine & Oil Fluid Additives

We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Oils & Fluids items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.

We collected and analyzed 306 of Engine & Oil Fluid Additives reviews based on our selection criteria. It helped us shortlist the top qualified and rated Engine & Oil Fluid Additives for Oils & Fluids, We found that most customers choose Engine & Oil Fluid Additives with an average price of $21.66, and the top brands are Generic, Lucas Oil, Liqui Moly, Bar's Leaks, Motul, STP, Rislone, REV X, Marvel Mystery Oil And Slick 50

Then our expert-level editors reviewed all those quality items and selected the top 30 Engine & Oil Fluid Additives for you, We have researched hundreds of sellers and picked the top sellers for Oils & Fluids, including Amazon Resale, VerSure, JBTools, Onogo US, Vera Tools, B and S Supply, VanMark Deals, DealsDelivered, Edo Performance, Tooldom Tools, Bicyclingfanatic And Impart Auto Parts. The Rislone High Mileage 4 6 8 Compression Repair, ... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 2,027 consumers with an average rating of 4.4.

We've helped a lot of satisfied users get the right Automotive product based on their needs, and save lots of time for them to pick Engine & Oil Fluid Additives to buy.


Written By Craig Hill

Christian Buccho is a mechanic in love with automotive repairs. He will be sharing his experience with us an automotive repairer over the years. He will not only provide us with informative articles, he would also be providing us with hands-on reviews on automotive parts.