10 Best Additives of 2025
Last updated on 09/26/2025
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Best Choice
1
Oxyfresh Premium Pet Dental Care Solution Pet Water Additive: Best Way to Eliminate Bad Dog Breath and Cat Bad Breath - Fights Tartar & Plaque - So Easy, Just Add to Water! Vet Recommended 16 oz.
Oxyfresh
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Oxyfresh
Oxyfresh Premium Pet Dental Care Solution Pet Water Additive: Best Way to Eliminate Bad Dog Breath and Cat Bad Breath - Fights Tartar & Plaque - So Easy, Just Add to Water! Vet Recommended 16 oz.
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Why we love it
- Freshens pet breath effectively.
- Cleans teeth without brushing.
- Picky pets love it too.
Main Highlights
- FRESH PET BREATH – Finally say good-bye to dog and cat bad breath with our fast-acting pet bad breath treatment for dogs and cats. It’s the best, quick & easy cat & dog breath freshener.
- CLEAN TEETH AND GUMS – The easiest way to clean your pet's teeth! Our veterinarian recommended cat and dog oral care water additive helps fight plaque and tartar for healthy teeth and gums.
- SKIP THE BRUSHING – That’s right, no more wrestling with pet toothpaste and toothbrushes; just add a capful of our cat and dog dental care liquid to their water bowl each day – it’s that easy!
- PICKY PET APPROVED – We don't mask with mint or tea tree that can be harmful to dogs and cats. Our Pet Dental Water Additive is odorless and tasteless, so they don't even know it's there.
- IT WORKS – Trusted by pet parents, our cat and dog dental water additive is made in the U.S.A. with only the highest quality ingredients, and is a pet bad breath eliminator that actually works.
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Value for Money
2
Archoil AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles
Archoil
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Archoil
Archoil AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles
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Why we love it
- Treats 400 gallons efficiently.
- Restores diesel performance and MPG.
- Cleans and protects fuel systems.
Main Highlights
- 40 oz bottle treats 400 gallons - Use at every fill-up
- Formulated to address issues with modern diesel fuels to restore and maximize performance and fuel economy (MPG)
- The only diesel treatment to clean the post-combustion system (turbo, DPF) to prevent premature failure and reduce regeneration frequency
- Incorporates Archoil's proven combustion modifier technology and a strong cetane boost to increase power and response
- Cleans, lubricates and protects your fuel system (including HPCR systems)
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3
LIQUI MOLY Oil Additive Cera Tec 20002 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Performance, Less Friction & Lower Fuel Consumption 300 ml
Liqui Moly
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Liqui Moly
LIQUI MOLY Oil Additive Cera Tec 20002 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Performance, Less Friction & Lower Fuel Consumption 300 ml
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Why we love it
- Compatible with all motor oils.
- Stable under extreme conditions.
- No deposits or filter issues.
Main Highlights
- Mixable with all commercially available motor oils
- Stable even under high thermal and dynamic permanent loads
- No deposits and absolutely compatible with all commonly used filter systems
- Resists extremely high and low temperatures
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4
Badditives!: The 13 Most Harmful Food Additives in Your Diet?and How to Avoid Them
Skyhorse
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Skyhorse
Badditives!: The 13 Most Harmful Food Additives in Your Diet?and How to Avoid Them
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5
Liqui Moly 20004 Hydraulic Lifter Additive 300 ml
Liqui Moly
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Liqui Moly
Liqui Moly 20004 Hydraulic Lifter Additive 300 ml
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Why we love it
- Enhances oil lubrication properties.
- Cleans and maintains valve bores.
- Compatible with turbo and catalytic.
Main Highlights
- Improves the lubrication properties of the oil
- Cleans valve bores
- Suitable for use in vehicles with turbochargers and vehicles with catalytic converters
- Prevents engine noises caused by hydraulic tappets
- Flash point: 60.0 degrees_celsius
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6
Hot Shot's Secret Everyday Diesel Treatment 16 Ounce Squeeze Bottle (HSSEDT16ZS)
Hot Shot's Secret
12% OffFree Shipping
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Hot Shot's Secret
Hot Shot's Secret Everyday Diesel Treatment 16 Ounce Squeeze Bottle (HSSEDT16ZS)
12% OffFree Shipping
Why we love it
- Boosts Cetane For Better Performance.
- Enhances Fuel Economy And Power.
- Prevents Rust And Stabilizes Fuel.
Main Highlights
- Boosts Cetane Up To 7 Points
- Increases Power, Performance, And Fuel Economy
- Stabilize Fuel & Disperse Moisture
- Increases Lubricity & Prevent Rust And Corrosion
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7
Vetradent® Water Additive for Dogs and Cats, 17 oz
Vetradent
39% OffFree Shipping
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Vetradent
Vetradent® Water Additive for Dogs and Cats, 17 oz
39% OffFree Shipping
Why we love it
- Promotes healthy dental hygiene.
- Reduces tartar effectively.
- Safe for both dogs and cats.
Main Highlights
- Helps maintain and promote good dental hygiene
- Scientifically formulated to reduce tartar
- For dogs and cats
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8
A Consumer's Dictionary of Food Additives, 7th Edition: Descriptions in Plain English of More Than 12,000 Ingredients Both Harmful and Desirable Found in Foods
Harmony Books
13% OffFree Shipping
Harmony Books
A Consumer's Dictionary of Food Additives, 7th Edition: Descriptions in Plain English of More Than 12,000 Ingredients Both Harmful and Desirable Found in Foods
13% OffFree Shipping
9
A Consumer's Guide to Toxic Food Additives: How to Avoid Synthetic Sweeteners, Artificial Colors, MSG, and More
Skyhorse
13% OffFree Shipping
Skyhorse
A Consumer's Guide to Toxic Food Additives: How to Avoid Synthetic Sweeteners, Artificial Colors, MSG, and More
13% OffFree Shipping
10
Lucas Oil 10003 Fuel Treatment - 1 Quart
Lucas Oil
11% OffFree Shipping
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Lucas Oil
Lucas Oil 10003 Fuel Treatment - 1 Quart
11% OffFree Shipping
Why we love it
- World’s #1 fuel additive.
- Great tune-up in a bottle.
- Cleans and lubricates fuel systems.
Main Highlights
- The world’s #1 fuel additive for both gasoline and diesel engines
- A great tune-up in a bottle – treats gasoline, diesel fuel and increases MPG
- Cleans and lubricates the fuel system, including fuel injectors, carburetor and combustion chamber
- Improves fuel economy by burning excess exhaust emissions
- Increases power and acceleration by improving fuel flow and reducing deposit buildup
- Neutralizes sulfur and other harmful contaminants present in the fuel system
- Increases the life of pumps and injectors
- Prevents rust and corrosion, prolonging the life of engine and fuel system components
- Complies with federal low sulfur content requirements for diesel motor vehicles and non-road, locomotive and marine diesel equipment engines
- Safely replaces the need for lead in older engines without causing harmful effects
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