Best Deals This Week

Best Additives Deals Online in the US (10 deals found)

Last Updated - March 15, 2026 Sort By:

Best Choice

New
Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise, Vibration - Boosts Fuel Economy & Horsepower - Works on Transmissions & Differentials (16oz)
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.

$28.99
New
STA-BIL Storage Fuel Stabilizer | Keeps Fuel Fresh for 24 Months, Prevents Corrosion, Gasoline Treatment Fuel Additive that Protects Fuel System, Gas Stabilizer for Fuel Storage, 32 oz.
Replaces: Cub Cadet 22216, 22287

$12.48
New
STA-BIL Storage Fuel Stabilizer | Keeps Fuel Fresh for 24 Months, Prevents Corrosion, Gasoline Treatment Fuel Additive that Protects Fuel System, Gas Stabilizer for Fuel Storage, 32 oz.
Replaces: Cub Cadet 22216, 22287

$12.48
Best Value

New
Hot Shot's Secret Everyday Diesel Treatment (HSSEDT16ZS) 6-in-1 Diesel Fuel Additive - Treats 400 Gallons, Diesel Injector Cleaner, Diesel Fuel System Cleaner, Diesel Additive Boosts Cetane, 16oz
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.

$18.97 $19.99
New
Hot Shot's Secret Everyday Diesel Treatment (HSSEDT16ZS) 6-in-1 Diesel Fuel Additive - Treats 400 Gallons, Diesel Injector Cleaner, Diesel Fuel System Cleaner, Diesel Additive Boosts Cetane, 16oz
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.

$18.97 $19.99
New
Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009
Motor oil additive - Liqui Moly MoS2 anti-friction (300 ml. Can).Fit Type: Universal

$9.99
New
Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009
Motor oil additive - Liqui Moly MoS2 anti-friction (300 ml. Can).Fit Type: Universal

$9.99
13% Off

New
STP Ceramic Oil Treatment, Protective Coating and Anti-Friction Technology, 15 Oz (19387)
Ceramic coating remains after oil changes to protect your engine for up to 15,000 miles

$12.50 $14.29
17% Off

New
STP Ceramic Oil Treatment, Protective Coating and Anti-Friction Technology, 15 Oz (19387)
Ceramic coating remains after oil changes to protect your engine for up to 15,000 miles

$11.87 $14.29
New
Hot Shot's Secret Everyday Diesel Treatment 16 oz. (5 Pack) Squeeze Bottle, 6-in-1 Diesel Additive - Injector Cleaner, Fuel System Cleaner, Fuel Additive Boosts Cetane, Packaging May Vary
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.

$70.13

10 Additives deals are available from: Amazon stores, starting from $9.99.
The biggest discount we found is 17% on STP Ceramic Oil Treatment, Protective Coating and Anti-Friction Technology, 15 Oz (19387) at Amazon.
The lowest price we found is $9.99 while the highest is $70.13.
Prices for the best Additives deals average at $20.64.
Last updated on March 15, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Additives.