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Best additives - August 2025

Last Updated - August 11, 2025

1
Best Choice
26% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Hot Shot's Secret
26% Off

Hot Shot's Secret Everyday Diesel Treatment 1 Gallon, 6-in-1 Diesel Additive - Injector Cleaner, Fuel System Cleaner, Fuel Additive Boosts Cetane (HSSEDT01G)

Hot Shot's Secret

$66.52

$89.99
(26% Off)

More Details
Main highlights
- PREVENTS RUST & CORROSION: While demulsifying moisture & adding stability to fuel by preventing oxidation & degradation, it also provides a reliable solution for protecting fuel systems from the damaging effects of rust & corrosion.
- POWERED BY SCIENCE: Our products are engineered to resolve issues, make equipment last longer and improve efficiency. Nothing leaves our building with our name on it unless we know it is absolutely the BEST it can be.
- FUEL INJECTOR CLEANER: Cleans both internal & external injector deposits, enhances the lubricity of fuel to safeguard the fuel system components, such as the pump & injectors to increase engine longevity while also acting as a fuel system cleaner.
- EVERYDAY TREATMENT: Keep your diesel engine in top condition with our EDT that is designed to improve performance & maintain engine health. With regular use, you can ensure your engine runs smoothly & efficiently giving you peace of mind on the road.
- EASY TO USE: Use at every fill-up, 1 oz. or 2oz. (for more cetane and lubricity boost) for every 25 gallons of diesel, this product is easy to use! Just pour it into your diesel fuel tank during your next fill up.
- BOOST FUEL ECONOMY: Enhance your vehicle performance with our diesel additive that boosts cetane levels by up to 7 points resulting in better fuel economy & reduced maintenance costs. Say goodbye to poor acceleration & frequent trips to the mechanic.
$66.52
$89.99 (26% Off)
2
Best Value
16% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Oxyfresh
16% Off

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 2 Pack

Oxyfresh

$29.95

$35.90
(16% Off)

More Details
Main highlights
- 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 – If you've tried everything else, you might as well try something that 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.
- 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.
$29.95
$35.90 (16% Off)
3

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

YGDMD

YGDMD 2025 Upgraded Magnetic Diesel Additive Holder,Leak-Proof & Portable Magnetic Bottle Holder for Secure Fixing,Universal Car Organizer for Diesel Additive for Most Vehicles (Magnetic Type)

YGDMD

$16.49

More Details
Main highlights
- SCREW STYLE: This diesel fuel additive holder comes with 4 pre-drilled mounting screw holes on the back, which can be firmly fixed in the mounting position without shifting or falling off, etc., locking the diesel fuel additive firmly for you
- ORGANIZED CAR STORAGE: Fuel bottle holder allows you to place all kinds of additives, so that it is no longer in the trunk roll around, use to look for half a day or emergency braking splash leakage. Make your maintenance work more efficient and faster
- MAGNETIC STYLE: Diesel additive holder comes with 4 strong magnets on the back, the adsorption force is far more than ordinary magnets, it can be firmly affixed to the metal surface, and it will not fall off or spill out on bumpy roads
- DURABLE MATERIAL: This diesel additive holder is made of impact-resistant material with excellent durability, drop-proof, the maximum load capacity reaches about 7 pounds, not easy to deform and break, providing a long service life
- BUYER'S NOTE: We offer you 2 diesel additive holders, one magnetic (size: 5.11 x 2.86 x 2.76 inch) and one screw type (size: 4.72 x 3.55 x 3.17 inch). Please measure your additive's bottle carefully to see if it fits this size before ordering
$16.49
4

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

TropiClean

TropiClean Fresh Breath Water Additive for Dogs, Dog Breath Freshener and Teeth Cleaning Solution, No Toothpaste or Toothbrush Required, 33.8oz.

TropiClean

$22.94

More Details
Main highlights
- VOHC Accepted: This product is VOHC (Veterinary Oral Health Council) recognized.
- HAPPY & HEALTHY — Dogs with sensitive stomachs or new to Fresh Breath for Dogs should start with 1/2 the recommended dose.
- Freshens Breath: Combat bad dog breath with tasteless dog mouthwash that lasts up to 12 hours.
- Ease of Use: Forget the struggle of dog toothpaste and brushes. Try this stress-free alternative.
- Cleans Beyond Teeth: Actively contributes to a clean mouth by reducing plaque and tartar build-up in 14 days or less.
$22.94
5

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Skyhorse

Badditives!: The 13 Most Harmful Food Additives in Your Diet?and How to Avoid Them

Skyhorse

$14.99

More Details
Main highlights
$14.99

Best additives - August 2025

Hot Shot's Secret Everyday Diesel Treatment 1 Gallon, 6-in-1 Diesel Additive - Injector Cleaner, Fuel System Cleaner, Fuel Additive Boosts Cetane (HSSEDT01G)

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 2 Pack

YGDMD 2025 Upgraded Magnetic Diesel Additive Holder,Leak-Proof & Portable Magnetic Bottle Holder for Secure Fixing,Universal Car Organizer for Diesel Additive for Most Vehicles (Magnetic Type)

TropiClean Fresh Breath Water Additive for Dogs, Dog Breath Freshener and Teeth Cleaning Solution, No Toothpaste or Toothbrush Required, 33.8oz.

Badditives!: The 13 Most Harmful Food Additives in Your Diet?and How to Avoid Them

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