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$10.99
Seafoam Sea Foam Motor Treatment, Size 16 Oz | Overton's
Overton's
5K+
$10.99
Seafoam Sea Foam Motor Treatment, Size 16 Oz | Overton's
Overton's
5K+
$118.69
Tribotex Nano Oil Additive Car Engine Treatment: Add To Engine Lube - Makes High Mileage Cars Like New With A Synthetic Material (Treats One Regular
Amazon.com
1K+
Free shipping
$118.69
Tribotex Nano Oil Additive Car Engine Treatment: Add To Engine Lube - Makes High Mileage Cars Like New With A Synthetic Material (Treats One Regular
Amazon.com
1K+
$31.64
$38.95
Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment, 32-Ounce, Single, Black
Amazon.com
2K+
18% off
$31.64
$38.95
Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment, 32-Ounce, Single, Black
Amazon.com
2K+
$13.90
Acdelco GM Original Equipment 10-4003 Limited Slip Axle Lubricant Additive - 4 Oz
Amazon.com
867
$13.90
Acdelco GM Original Equipment 10-4003 Limited Slip Axle Lubricant Additive - 4 Oz
Amazon.com
867
$31.49
Hot Shot's Secret - HSSTSE32Z Shift Restore Automatic Transmission Additive 32 Fluid Ounce Bottle
Amazon.com
1K+
$31.49
Hot Shot's Secret - HSSTSE32Z Shift Restore Automatic Transmission Additive 32 Fluid Ounce Bottle
Amazon.com
1K+
$17.97
$21.99
Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce
Amazon.com
1K+
18% off
$17.97
$21.99
Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce
Amazon.com
1K+
$66.15
$89.99
Hot Shot's Secret Everyday Diesel Treatment 1 Gallon, 6-In-1 Diesel Additive - Injector Cleaner, Fuel System Cleaner, Fuel Additive Boosts Cetane (
Amazon.com
5K+
Free shipping
26% off
$66.15
$89.99
Hot Shot's Secret Everyday Diesel Treatment 1 Gallon, 6-In-1 Diesel Additive - Injector Cleaner, Fuel System Cleaner, Fuel Additive Boosts Cetane (
Amazon.com
5K+
$13.12
Lucas Oil Fuel Treatment | 10003LUC
Peterbilt Parts
$13.12
Lucas Oil Fuel Treatment | 10003LUC
Peterbilt Parts
$99.03
Motorkote MK-HL01G-04 Heavy Duty Hyper Lubricant, 1-Gallon, Single
Amazon.com
3K+
Free shipping
$99.03
Motorkote MK-HL01G-04 Heavy Duty Hyper Lubricant, 1-Gallon, Single
Amazon.com
3K+
$70.19
$99.99
Hot Shot's Secret LX4 Lubricity Extreme 1 Gallon, Fuel Treatment For All Engines, Gasoline & Diesel Additive, Fuel Additive Increases Lubricity,
Amazon.com
49
Free shipping
29% off
$70.19
$99.99
Hot Shot's Secret LX4 Lubricity Extreme 1 Gallon, Fuel Treatment For All Engines, Gasoline & Diesel Additive, Fuel Additive Increases Lubricity,
Amazon.com
49
$32.99
LIQUI MOLY Cera Tec Friction Motor Oil Additive, 300 Ml, 20002
Advance Auto Parts
In store
15% Off*
Curbside
$32.99
LIQUI MOLY Cera Tec Friction Motor Oil Additive, 300 Ml, 20002
Advance Auto Parts
15% Off*
$15.99
Hot Shot's Secret Gasoline Extreme 12 Oz, Concentrated Fuel System Cleaner, Fuel Additive For Gasoline Engines, Fuel Injector Cleaner - Increases Fuel
Amazon.com
598
$15.99
Hot Shot's Secret Gasoline Extreme 12 Oz, Concentrated Fuel System Cleaner, Fuel Additive For Gasoline Engines, Fuel Injector Cleaner - Increases Fuel
Amazon.com
598
$74.99
Zmax 58-011 - Engine & Fuel Formula Kit - Easy To Use - Reduces Carbon Build-Up & Lubricates Metal Extending Life Of Car Or Truck - Runs Efficiently,
Amazon.com
1K+
Free shipping
$74.99
Zmax 58-011 - Engine & Fuel Formula Kit - Easy To Use - Reduces Carbon Build-Up & Lubricates Metal Extending Life Of Car Or Truck - Runs Efficiently,
Amazon.com
1K+
$97.99
Tribotex Oil Additive: Treatment For Engine & Oil Automotive, With
eBay
55
$97.99
Tribotex Oil Additive: Treatment For Engine & Oil Automotive, With
eBay
55
$10.99
$13.99
Sea Foam High Mileage Motor Treatment Fuel And Oil Additive, For Gas Engines Over 75,000 Miles, 16 Oz., HM16
Advance Auto Parts
In store
6
Curbside
$10.99
$13.99
Sea Foam High Mileage Motor Treatment Fuel And Oil Additive, For Gas Engines Over 75,000 Miles, 16 Oz., HM16
Advance Auto Parts
6
$10.49
STP Synthetic Automotive Oil Treatment - 15 Fl. Oz. Bottle, 18413B
Advance Auto Parts
In store
15% Off*
Curbside
$10.49
STP Synthetic Automotive Oil Treatment - 15 Fl. Oz. Bottle, 18413B
Advance Auto Parts
15% Off*
$19.49
Hot Shot's Secret STICTION ELIMINATOR Engine Oil Additive- 16 OZ
D&J Precision Machine
3K+
$19.49
Hot Shot's Secret STICTION ELIMINATOR Engine Oil Additive- 16 OZ
D&J Precision Machine
3K+
$89.68
1 Gallon Power Additive - Klotz Synthetic Nitro Power Additive | Klotz Synthetic Lubricants KL-640
Summit Racing
5
$89.68
1 Gallon Power Additive - Klotz Synthetic Nitro Power Additive | Klotz Synthetic Lubricants KL-640
Summit Racing
5
$24.64
32 Oz. Cetane Boost - VP Racing Madditive Cetanium Cetane Concentrate | VP Racing Fuels 2865
Summit Racing
1
$24.64
32 Oz. Cetane Boost - VP Racing Madditive Cetanium Cetane Concentrate | VP Racing Fuels 2865
Summit Racing
1
$24.64
32 Oz. Octane Boost - VP Racing Madditive Octanium Unleaded Concentrate | VP Racing Fuels 29505
Summit Racing
8
$24.64
32 Oz. Octane Boost - VP Racing Madditive Octanium Unleaded Concentrate | VP Racing Fuels 29505
Summit Racing
8
$59.99
Hot Shot's Secret STICTION ELIMINATOR Engine Oil Additive - 64 OZ
D&J Precision Machine
3K+
$59.99
Hot Shot's Secret STICTION ELIMINATOR Engine Oil Additive - 64 OZ
D&J Precision Machine
3K+
$22.95
$25.00
Mishimoto MMRA-LC Mustang Coolant Additive Liquid Chill 4 Oz 1965
CJ Pony Parts
60-day returns (most items)
$22.95
$25.00
Mishimoto MMRA-LC Mustang Coolant Additive Liquid Chill 4 Oz 1965
CJ Pony Parts
60-day returns
$35.67
Lucas Hydraulic Oil Additive Booster | 10018
Peterbilt Parts
$35.67
Lucas Hydraulic Oil Additive Booster | 10018
Peterbilt Parts
$378.34
Motorcraft Total Air/Fuel/Oil Service Kit & Additives For 11-16 6.7L
eBay
Free shipping
$378.34
Motorcraft Total Air/Fuel/Oil Service Kit & Additives For 11-16 6.7L
eBay
Free shipping
$8.09
$15.99
DEI Heater Hotter 16 Oz. Performance Coolant Additive
CJ Pony Parts
60-day returns (most items)
49% off
$8.09
$15.99
DEI Heater Hotter 16 Oz. Performance Coolant Additive
CJ Pony Parts
60-day returns
$17.99
Liqui Moly Mos2 Anti-Friction Engine Treatment | 300 Ml | Oil Additive
eBay
Free shipping
$17.99
Liqui Moly Mos2 Anti-Friction Engine Treatment | 300 Ml | Oil Additive
eBay
Free shipping
$22.95
$25.00
Mishimoto Liquid Chill® Radiator Coolant Additive MMRA-LC
Mishimoto Automotive
$22.95
$25.00
Mishimoto Liquid Chill® Radiator Coolant Additive MMRA-LC
Mishimoto Automotive
$8.99
$14.99
DEI Radiator Relief Cooling Additive 16-Oz 2000
CJ Pony Parts
60-day returns (most items)
40% off
$8.99
$14.99
DEI Radiator Relief Cooling Additive 16-Oz 2000
CJ Pony Parts
60-day returns
$49.20
$82.00
Opti-Lube XPD All-Season Diesel Fuel Additive - Gallon (1 Gallon (Treats 512 Gallons))(1 Gallon (Treats 512 Gallons))
atpeventdecor.com
39% off
$49.20
$82.00
Opti-Lube XPD All-Season Diesel Fuel Additive - Gallon (1 Gallon (Treats 512 Gallons))(1 Gallon (Treats 512 Gallons))
atpeventdecor.com
$36.95
Rev-X Oil Additive 4 Oz Bottle
Diesel Auto Power - July 7th 2025
30-day returns (most items)
$36.95
Rev-X Oil Additive 4 Oz Bottle
Diesel Auto Power - July 7th 2025
30-day returns
$35.99
Hot Shots Secret FR3 Oil Additive
Mark DeCola Diesel Performance LLC
$35.99
Hot Shots Secret FR3 Oil Additive
Mark DeCola Diesel Performance LLC
$18.97
Carb Defender - Carburetor Cleaner Fuel Additive | 1
Driven Racing Oil LLC
$18.97
Carb Defender - Carburetor Cleaner Fuel Additive | 1
Driven Racing Oil LLC
$16.25
Motor Medic M1815 Engine Treatment Additive 14 Oz
Voomi Supply
30-day returns (most items)
$16.25
Motor Medic M1815 Engine Treatment Additive 14 Oz
Voomi Supply
30-day returns
$7.95
Liqui Moly Engine Oil Additive 80Ml - 20196 | Speedaddicts.Com
Speed Addicts
90-day returns (most items)
$7.95
Liqui Moly Engine Oil Additive 80Ml - 20196 | Speedaddicts.Com
Speed Addicts
90-day returns
$114.00
Power Service Diesel 911 - 64Oz | 8064-06
Peterbilt Parts
18
$114.00
Power Service Diesel 911 - 64Oz | 8064-06
Peterbilt Parts
18
$22.49
Liqui Moly Oil Additive, 20284
Carparts.com
Free shipping
$22.49
Liqui Moly Oil Additive, 20284
Carparts.com
Free shipping
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    Shop automotive additives

    Sponsored
    About our ads
    $10.99
    Seafoam Sea Foam Motor Treatment, Size 16 Oz | Overton's
    Overton's
    5K+
    $10.99
    Seafoam Sea Foam Motor Treatment, Size 16 Oz | Overton's
    Overton's
    5K+
    $118.69
    Tribotex Nano Oil Additive Car Engine Treatment: Add To Engine Lube - Makes High Mileage Cars Like New With A Synthetic Material (Treats One Regular
    Amazon.com
    1K+
    Free shipping
    $118.69
    Tribotex Nano Oil Additive Car Engine Treatment: Add To Engine Lube - Makes High Mileage Cars Like New With A Synthetic Material (Treats One Regular
    Amazon.com
    1K+
    $31.64
    $38.95
    Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment, 32-Ounce, Single, Black
    Amazon.com
    2K+
    18% off
    $31.64
    $38.95
    Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment, 32-Ounce, Single, Black
    Amazon.com
    2K+
    $13.90
    Acdelco GM Original Equipment 10-4003 Limited Slip Axle Lubricant Additive - 4 Oz
    Amazon.com
    867
    $13.90
    Acdelco GM Original Equipment 10-4003 Limited Slip Axle Lubricant Additive - 4 Oz
    Amazon.com
    867
    $31.49
    Hot Shot's Secret - HSSTSE32Z Shift Restore Automatic Transmission Additive 32 Fluid Ounce Bottle
    Amazon.com
    1K+
    $31.49
    Hot Shot's Secret - HSSTSE32Z Shift Restore Automatic Transmission Additive 32 Fluid Ounce Bottle
    Amazon.com
    1K+
    $17.97
    $21.99
    Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce
    Amazon.com
    1K+
    18% off
    $17.97
    $21.99
    Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce
    Amazon.com
    1K+
    $66.15
    $89.99
    Hot Shot's Secret Everyday Diesel Treatment 1 Gallon, 6-In-1 Diesel Additive - Injector Cleaner, Fuel System Cleaner, Fuel Additive Boosts Cetane (
    Amazon.com
    5K+
    Free shipping
    26% off
    $66.15
    $89.99
    Hot Shot's Secret Everyday Diesel Treatment 1 Gallon, 6-In-1 Diesel Additive - Injector Cleaner, Fuel System Cleaner, Fuel Additive Boosts Cetane (
    Amazon.com
    5K+
    $13.12
    Lucas Oil Fuel Treatment | 10003LUC
    Peterbilt Parts
    $13.12
    Lucas Oil Fuel Treatment | 10003LUC
    Peterbilt Parts
    $99.03
    Motorkote MK-HL01G-04 Heavy Duty Hyper Lubricant, 1-Gallon, Single
    Amazon.com
    3K+
    Free shipping
    $99.03
    Motorkote MK-HL01G-04 Heavy Duty Hyper Lubricant, 1-Gallon, Single
    Amazon.com
    3K+
    $70.19
    $99.99
    Hot Shot's Secret LX4 Lubricity Extreme 1 Gallon, Fuel Treatment For All Engines, Gasoline & Diesel Additive, Fuel Additive Increases Lubricity,
    Amazon.com
    49
    Free shipping
    29% off
    $70.19
    $99.99
    Hot Shot's Secret LX4 Lubricity Extreme 1 Gallon, Fuel Treatment For All Engines, Gasoline & Diesel Additive, Fuel Additive Increases Lubricity,
    Amazon.com
    49
    $32.99
    LIQUI MOLY Cera Tec Friction Motor Oil Additive, 300 Ml, 20002
    Advance Auto Parts
    In store
    15% Off*
    Curbside
    $32.99
    LIQUI MOLY Cera Tec Friction Motor Oil Additive, 300 Ml, 20002
    Advance Auto Parts
    15% Off*
    $15.99
    Hot Shot's Secret Gasoline Extreme 12 Oz, Concentrated Fuel System Cleaner, Fuel Additive For Gasoline Engines, Fuel Injector Cleaner - Increases Fuel
    Amazon.com
    598
    $15.99
    Hot Shot's Secret Gasoline Extreme 12 Oz, Concentrated Fuel System Cleaner, Fuel Additive For Gasoline Engines, Fuel Injector Cleaner - Increases Fuel
    Amazon.com
    598
    $74.99
    Zmax 58-011 - Engine & Fuel Formula Kit - Easy To Use - Reduces Carbon Build-Up & Lubricates Metal Extending Life Of Car Or Truck - Runs Efficiently,
    Amazon.com
    1K+
    Free shipping
    $74.99
    Zmax 58-011 - Engine & Fuel Formula Kit - Easy To Use - Reduces Carbon Build-Up & Lubricates Metal Extending Life Of Car Or Truck - Runs Efficiently,
    Amazon.com
    1K+
    $97.99
    Tribotex Oil Additive: Treatment For Engine & Oil Automotive, With
    eBay
    55
    $97.99
    Tribotex Oil Additive: Treatment For Engine & Oil Automotive, With
    eBay
    55
    $10.99
    $13.99
    Sea Foam High Mileage Motor Treatment Fuel And Oil Additive, For Gas Engines Over 75,000 Miles, 16 Oz., HM16
    Advance Auto Parts
    In store
    6
    Curbside
    $10.99
    $13.99
    Sea Foam High Mileage Motor Treatment Fuel And Oil Additive, For Gas Engines Over 75,000 Miles, 16 Oz., HM16
    Advance Auto Parts
    6
    $10.49
    STP Synthetic Automotive Oil Treatment - 15 Fl. Oz. Bottle, 18413B
    Advance Auto Parts
    In store
    15% Off*
    Curbside
    $10.49
    STP Synthetic Automotive Oil Treatment - 15 Fl. Oz. Bottle, 18413B
    Advance Auto Parts
    15% Off*
    $19.49
    Hot Shot's Secret STICTION ELIMINATOR Engine Oil Additive- 16 OZ
    D&J Precision Machine
    3K+
    $19.49
    Hot Shot's Secret STICTION ELIMINATOR Engine Oil Additive- 16 OZ
    D&J Precision Machine
    3K+
    $89.68
    1 Gallon Power Additive - Klotz Synthetic Nitro Power Additive | Klotz Synthetic Lubricants KL-640
    Summit Racing
    5
    $89.68
    1 Gallon Power Additive - Klotz Synthetic Nitro Power Additive | Klotz Synthetic Lubricants KL-640
    Summit Racing
    5