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Sponsored
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$96.46
Slick 50 Supercharged Synthetic Engine Treatment | 15 Oz., 6-Pack
Amazon.com
19
Free shipping
$96.46
Slick 50 Supercharged Synthetic Engine Treatment | 15 Oz., 6-Pack
Amazon.com
19
$45.35
$65.94
Rislone 4405-6PK Hy-Per Lube Zinc ZDDP Supplement, 11 Oz, 6-Pack | Real ZDDP Zinc Additive
Amazon.com
1K+
Free shipping
31% off
$45.35
$65.94
Rislone 4405-6PK Hy-Per Lube Zinc ZDDP Supplement, 11 Oz, 6-Pack | Real ZDDP Zinc Additive
Amazon.com
1K+
$95.82
Dura Lube Engine Treatment | 32 Oz., 6-Pack
Amazon.com
437
Free shipping
$95.82
Dura Lube Engine Treatment | 32 Oz., 6-Pack
Amazon.com
437
$20.91
TKO Engine Oil Treatment 1 Pint
americanvaluesproducts.com
$20.91
TKO Engine Oil Treatment 1 Pint
americanvaluesproducts.com
$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*
$7.99
Rislone High Mileage Engine Treatment Conditioner And Cleaner, 16.9 Oz, 4102
Advance Auto Parts
In store
15% Off*
Curbside
$7.99
Rislone High Mileage Engine Treatment Conditioner And Cleaner, 16.9 Oz, 4102
Advance Auto Parts
15% Off*
$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+
$8.99
Restore Engine Restorer & Lubricant, 4 Cylinder Formula, 00009
Advance Auto Parts
In store
15% Off*
Curbside
$8.99
Restore Engine Restorer & Lubricant, 4 Cylinder Formula, 00009
Advance Auto Parts
15% Off*
$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
$57.99
Sta-Bil Fuel Stabilizer, 128 Oz | Overton's
Overton's
27K+
$57.99
Sta-Bil Fuel Stabilizer, 128 Oz | Overton's
Overton's
27K+
$111.95
Liqui Moly 20004 Hydraulic Lifter Additive 300Ml Engine Noise Reducer
eBay
106
$111.95
Liqui Moly 20004 Hydraulic Lifter Additive 300Ml Engine Noise Reducer
eBay
106
$109.95
1 Gallon Power Additive - Klotz Synthetic Nitro Power Additive | Klotz Synthetic Lubricants KL-640
Summit Racing
5
Free shipping
$109.95
1 Gallon Power Additive - Klotz Synthetic Nitro Power Additive | Klotz Synthetic Lubricants KL-640
Summit Racing
5
$56.98
$76.92
Bluengine Lubricant Treatment: Nanotechnology Engine Oil Additive - 260Ml
versactfit
25% off
$56.98
$76.92
Bluengine Lubricant Treatment: Nanotechnology Engine Oil Additive - 260Ml
versactfit
$56.98
$76.92
Bluengine Lubricant Treatment: Nanotechnology Engine Oil Additive - 260Ml
Seanluciwuss
25% off
$56.98
$76.92
Bluengine Lubricant Treatment: Nanotechnology Engine Oil Additive - 260Ml
Seanluciwuss
$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
$9.98
Start Your Engines! 2-Oz 2-Cycle Or 4-Cycle Engines Fuel Additive | 21214
Lowe's
$9.98
Start Your Engines! 2-Oz 2-Cycle Or 4-Cycle Engines Fuel Additive | 21214
Lowe's
$16.75
AVBLEND Engine Oil Additive 12 Oz
AircraftSpruce.com
$16.75
AVBLEND Engine Oil Additive 12 Oz
AircraftSpruce.com
$94.95
Maxmpg Diesel Additive - 1 Gallon Bottle For Maximum Performance
Industrial Injection Diesel Performance
$94.95
Maxmpg Diesel Additive - 1 Gallon Bottle For Maximum Performance
Industrial Injection Diesel Performance
$12.99
$17.99
Eastwood 4 Oz. ZDDP Oil Additive
Classic Muscle Parts
60-day returns (most items)
27% off
$12.99
$17.99
Eastwood 4 Oz. ZDDP Oil Additive
Classic Muscle Parts
60-day returns
$21.85
Camguard Sml Engine Oil Additive 8Oz
AircraftSpruce.com
$21.85
Camguard Sml Engine Oil Additive 8Oz
AircraftSpruce.com
$12.99
$17.99
Eastwood 4Oz. ZDDP Oil Additive
CJ Pony Parts
60-day returns (most items)
27% off
$12.99
$17.99
Eastwood 4Oz. ZDDP Oil Additive
CJ Pony Parts
60-day returns
$21.84
SEA FOAM SEASF16 Engine Treatment Additive, 16 Oz, Engine Cleaner, Lubricates & Deposit Removal
Voomi Supply
30-day returns (most items)
$21.84
SEA FOAM SEASF16 Engine Treatment Additive, 16 Oz, Engine Cleaner, Lubricates & Deposit Removal
Voomi Supply
30-day returns
$101.90
Rev-X Diesel Kits | Distance/Rev-X Oil Additive/Fuel Additive
Diesel Power Products
30-day returns (most items)
$101.90
Rev-X Diesel Kits | Distance/Rev-X Oil Additive/Fuel Additive
Diesel Power Products
30-day returns
$12.24
SY3112 MOTOR AID OIL TREATMENT - 12 OZ
Intella Parts Company
$12.24
SY3112 MOTOR AID OIL TREATMENT - 12 OZ
Intella Parts Company
$201.48
Red Line Engine Break-In Additive 16 Oz Red81403 (Comes In Case Of 12 Units)
Extreme Power House
$201.48
Red Line Engine Break-In Additive 16 Oz Red81403 (Comes In Case Of 12 Units)
Extreme Power House
$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
$97.88
LIQUI MOLY 300Ml Mos2 Anti-Friction Engine Treatment
Extreme Power House
$97.88
LIQUI MOLY 300Ml Mos2 Anti-Friction Engine Treatment
Extreme Power House
$22.50
1 Pint Power Additive - Klotz Synthetic Nitro Power Additive | Klotz Synthetic Lubricants KL-600
Summit Racing
90-day returns (most items)
$22.50
1 Pint Power Additive - Klotz Synthetic Nitro Power Additive | Klotz Synthetic Lubricants KL-600
Summit Racing
90-day returns
$13.99
Lucas Oil Tb Zinc Plus Engine Break-In Oil Additive 2017-2021 6.7L Ford Powerstroke -16Oz. Bottle
Blessed Performance
$13.99
Lucas Oil Tb Zinc Plus Engine Break-In Oil Additive 2017-2021 6.7L Ford Powerstroke -16Oz. Bottle
Blessed Performance
$10.08
ALLIANT POWER-Fuel Additive | AP0506
FleetPride
60-day returns (most items)
$10.08
ALLIANT POWER-Fuel Additive | AP0506
FleetPride
60-day returns
$17.70
Camguard Auto Oil Additive 8Oz
AircraftSpruce.com
$17.70
Camguard Auto Oil Additive 8Oz
AircraftSpruce.com
$49.99
Northstar Maintenance Kit For Northstar 420CC Engines, 2 Qts. 10/30W Oil, 8-Oz. Fuel Additive, Funnel, Filter And Spark Plug, Model 805644
Northern Tool
$49.99
Northstar Maintenance Kit For Northstar 420CC Engines, 2 Qts. 10/30W Oil, 8-Oz. Fuel Additive, Funnel, Filter And Spark Plug, Model 805644
Northern Tool
$28.95
Johnson / Evinrude Carbon Guard Fuel Additive 12 Oz. 775629
Trailer Parts Superstore
30-day returns (most items)
$28.95
Johnson / Evinrude Carbon Guard Fuel Additive 12 Oz. 775629
Trailer Parts Superstore
30-day returns
$49.99
Northstar Maintenance Kit For Northstar 300CC Engine, 2 Qts. 10/30W Oil, 12-Oz. Fuel Additive, 1 Filter, 1 Spark Plug, Model 805643
Northern Tool
$49.99
Northstar Maintenance Kit For Northstar 300CC Engine, 2 Qts. 10/30W Oil, 12-Oz. Fuel Additive, 1 Filter, 1 Spark Plug, Model 805643
Northern Tool
$11.78
Audi A4 Quattro B6 1.8T - Genuine Volkswagen Audi Fuel Additive: 90ML Gasoline Additive Used To Clean Your VW Or Audi's Fuel System
ECS Tuning
$11.78
Audi A4 Quattro B6 1.8T - Genuine Volkswagen Audi Fuel Additive: 90ML Gasoline Additive Used To Clean Your VW Or Audi's Fuel System
ECS Tuning
$13.12
Lucas Oil Fuel Treatment | 10003LUC
Peterbilt Parts
$13.12
Lucas Oil Fuel Treatment | 10003LUC
Peterbilt Parts
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    Shop engine additives

    Sponsored
    About our ads
    $96.46
    Slick 50 Supercharged Synthetic Engine Treatment | 15 Oz., 6-Pack
    Amazon.com
    19
    Free shipping
    $96.46
    Slick 50 Supercharged Synthetic Engine Treatment | 15 Oz., 6-Pack
    Amazon.com
    19
    $45.35
    $65.94
    Rislone 4405-6PK Hy-Per Lube Zinc ZDDP Supplement, 11 Oz, 6-Pack | Real ZDDP Zinc Additive
    Amazon.com
    1K+
    Free shipping
    31% off
    $45.35
    $65.94
    Rislone 4405-6PK Hy-Per Lube Zinc ZDDP Supplement, 11 Oz, 6-Pack | Real ZDDP Zinc Additive
    Amazon.com
    1K+
    $95.82
    Dura Lube Engine Treatment | 32 Oz., 6-Pack
    Amazon.com
    437
    Free shipping
    $95.82
    Dura Lube Engine Treatment | 32 Oz., 6-Pack
    Amazon.com
    437
    $20.91
    TKO Engine Oil Treatment 1 Pint
    americanvaluesproducts.com
    $20.91
    TKO Engine Oil Treatment 1 Pint
    americanvaluesproducts.com
    $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*
    $7.99
    Rislone High Mileage Engine Treatment Conditioner And Cleaner, 16.9 Oz, 4102
    Advance Auto Parts
    In store
    15% Off*
    Curbside
    $7.99
    Rislone High Mileage Engine Treatment Conditioner And Cleaner, 16.9 Oz, 4102
    Advance Auto Parts
    15% Off*
    $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+
    $8.99
    Restore Engine Restorer & Lubricant, 4 Cylinder Formula, 00009
    Advance Auto Parts
    In store
    15% Off*
    Curbside
    $8.99
    Restore Engine Restorer & Lubricant, 4 Cylinder Formula, 00009
    Advance Auto Parts
    15% Off*
    $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
    $57.99
    Sta-Bil Fuel Stabilizer, 128 Oz | Overton's
    Overton's
    27K+
    $57.99
    Sta-Bil Fuel Stabilizer, 128 Oz | Overton's
    Overton's
    27K+
    $111.95
    Liqui Moly 20004 Hydraulic Lifter Additive 300Ml Engine Noise Reducer
    eBay
    106
    $111.95
    Liqui Moly 20004 Hydraulic Lifter Additive 300Ml Engine Noise Reducer
    eBay
    106
    $109.95
    1 Gallon Power Additive - Klotz Synthetic Nitro Power Additive | Klotz Synthetic Lubricants KL-640
    Summit Racing
    5
    Free shipping
    $109.95
    1 Gallon Power Additive - Klotz Synthetic Nitro Power Additive | Klotz Synthetic Lubricants KL-640
    Summit Racing
    5
    $56.98
    $76.92
    Bluengine Lubricant Treatment: Nanotechnology Engine Oil Additive - 260Ml
    versactfit
    25% off
    $56.98
    $76.92
    Bluengine Lubricant Treatment: Nanotechnology Engine Oil Additive - 260Ml
    versactfit
    $56.98
    $76.92
    Bluengine Lubricant Treatment: Nanotechnology Engine Oil Additive - 260Ml
    Seanluciwuss
    25% off
    $56.98
    $76.92
    Bluengine Lubricant Treatment: Nanotechnology Engine Oil Additive - 260Ml
    Seanluciwuss
    $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
    $9.98
    Start Your Engines! 2-Oz 2-Cycle Or 4-Cycle Engines Fuel Additive | 21214
    Lowe's
    $9.98
    Start Your Engines! 2-Oz 2-Cycle Or 4-Cycle Engines Fuel Additive | 21214
    Lowe's
    $16.75
    AVBLEND Engine Oil Additive 12 Oz
    AircraftSpruce.com
    $16.75
    AVBLEND Engine Oil Additive 12 Oz
    AircraftSpruce.com
    $94.95
    Maxmpg Diesel Additive - 1 Gallon Bottle For Maximum Performance
    Industrial Injection Diesel Performance
    $94.95
    Maxmpg Diesel Additive - 1 Gallon Bottle For Maximum Performance
    Industrial Injection Diesel Performance