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Sponsored
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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+
$20.95
COMP Cams 159: COMP Cams Engine Break-In Oil Additive
Summit Racing
246
$20.95
COMP Cams 159: COMP Cams Engine Break-In Oil Additive
Summit Racing
246
$25.99
Bars Leaks Oil Seal Engine Oil Burning & Leaking Repair, 16.9 Oz, OS-1
Advance Auto Parts
In store
15% Off*
Curbside
$25.99
Bars Leaks Oil Seal Engine Oil Burning & Leaking Repair, 16.9 Oz, OS-1
Advance Auto Parts
15% Off*
$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*
$9.99
Rislone High Mileage Oil Supplement Stabilizer, 16.9 Oz, 4400
Advance Auto Parts
In store
1
Curbside
$9.99
Rislone High Mileage Oil Supplement Stabilizer, 16.9 Oz, 4400
Advance Auto Parts
1
$19.99
Slick 50 Engine Treatment 15 Oz
Ace Hardware
263
$19.99
Slick 50 Engine Treatment 15 Oz
Ace Hardware
263
$12.97
Storage Defender - Oil Additive | 1
Driven Racing Oil LLC
$12.97
Storage Defender - Oil Additive | 1
Driven Racing Oil LLC
$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+
$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+
$56.99
Crower 86092: Crower Zddplus Motor Oil Additive
Summit Racing
20
$56.99
Crower 86092: Crower Zddplus Motor Oil Additive
Summit Racing
20
$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
$79.90
Archoil AR6500 Diesel Treatment (40 Oz) Two Pack - Treats 800 Gallons - Additive For All Diesel Vehicles
Amazon.com
1K+
Free shipping
$79.90
Archoil AR6500 Diesel Treatment (40 Oz) Two Pack - Treats 800 Gallons - Additive For All Diesel Vehicles
Amazon.com
1K+
$147.52
True Brand Engine Max Treatment & Oil Stabilizer
Santie Wholesale Oil Company
$147.52
True Brand Engine Max Treatment & Oil Stabilizer
Santie Wholesale Oil Company
$112.95
Zmax 55-128 - Heavy Duty Multi-Purpose Formula For Engine & Fuel Systems - Easy To Use - Reduces Carbon Build-Up - Lubricates Metal - Improves Gas &
Amazon.com
445
Free shipping
$112.95
Zmax 55-128 - Heavy Duty Multi-Purpose Formula For Engine & Fuel Systems - Easy To Use - Reduces Carbon Build-Up - Lubricates Metal - Improves Gas &
Amazon.com
445
$32.99
Prolube Oil Treatment 16 Oz, Increases Horsepower, Lowers Operating
eBay
$32.99
Prolube Oil Treatment 16 Oz, Increases Horsepower, Lowers Operating
eBay
$50.39
Hot Shot's Secret HSS64Z: Hot Shot's Secret Stiction Eliminator Oil Additive
Summit Racing
4
$50.39
Hot Shot's Secret HSS64Z: Hot Shot's Secret Stiction Eliminator Oil Additive
Summit Racing
4
$33.13
$44.40
Tribotex Small Oil Additive Engine Treatment: Add To Engine Oil - Makes High New
shedfriends
25% off
$33.13
$44.40
Tribotex Small Oil Additive Engine Treatment: Add To Engine Oil - Makes High New
shedfriends
$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
$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
$5.99
STP Oil Treatment 15.73 Oz
Ace Hardware
249
$5.99
STP Oil Treatment 15.73 Oz
Ace Hardware
249
$15.99
Lucas Oil Products Heavy Duty Oil Stabilizer Oil Stabilizer 32 Oz
Ace Hardware
741
$15.99
Lucas Oil Products Heavy Duty Oil Stabilizer Oil Stabilizer 32 Oz
Ace Hardware
741
$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
$73.75
LW-16702 Lycoming Oil Additive Kit (6 Oz.)
AircraftSpruce.com
$73.75
LW-16702 Lycoming Oil Additive Kit (6 Oz.)
AircraftSpruce.com
$15.05
Part LVU11673: OIL ADDITIVE | John Deere
ModernEquipmentParts.com
$15.05
Part LVU11673: OIL ADDITIVE | John Deere
ModernEquipmentParts.com
$54.85
$60.82
Hot Shot's Secret Diesel Extreme 1 Gallon, Concentrated Fuel System Cleaner, Diesel Fuel Additive, Injector Cleaner - Increases MPG & Restores Engine
Amazon.com
4K+
Free shipping
$54.85
$60.82
Hot Shot's Secret Diesel Extreme 1 Gallon, Concentrated Fuel System Cleaner, Diesel Fuel Additive, Injector Cleaner - Increases MPG & Restores Engine
Amazon.com
4K+
$34.89
$41.87
Tribotex Small Oil Additive Engine Treatment: Add To Engine Oil - Makes High New
Peppytrend US
16% off
$34.89
$41.87
Tribotex Small Oil Additive Engine Treatment: Add To Engine Oil - Makes High New
Peppytrend US
$44.99
Oil Treatment - Engine Oil Additive For Gas & Diesel Engines - Reduces
eBay
Free shipping
$44.99
Oil Treatment - Engine Oil Additive For Gas & Diesel Engines - Reduces
eBay
Free shipping
$8.33
$9.25
STA-BIL Fogging Oil-Dirtbike Engine Oil Additive 22001
Motosport
$8.33
$9.25
STA-BIL Fogging Oil-Dirtbike Engine Oil Additive 22001
Motosport
$54.79
$82.19
Lucas 10063 Engine Break-In Oil Additive
hardclikk.com
33% off
$54.79
$82.19
Lucas 10063 Engine Break-In Oil Additive
hardclikk.com
$17.70
Camguard Auto Oil Additive 8Oz
AircraftSpruce.com
$17.70
Camguard Auto Oil Additive 8Oz
AircraftSpruce.com
$9.95
Xdp X Factor High Performance Oil Additive (For All Diesel Engines, 8 Oz. Bottle | Treats 5 Quarts)
Blessed Performance
$9.95
Xdp X Factor High Performance Oil Additive (For All Diesel Engines, 8 Oz. Bottle | Treats 5 Quarts)
Blessed Performance
$379.99
Cera Tec Engine Oil Additive (Case Of 12) - Liqui Moly
GenRacer
$379.99
Cera Tec Engine Oil Additive (Case Of 12) - Liqui Moly
GenRacer
$9.95
$13.23
High Performance Oil Additive Diesel Engines 8 Oz. Bottle Treats 5 Quarts X-Factor XD275 XDP
Norcal Diesel Performance
30-day returns (most items)
24% off
$9.95
$13.23
High Performance Oil Additive Diesel Engines 8 Oz. Bottle Treats 5 Quarts X-Factor XD275 XDP
Norcal Diesel Performance
30-day returns
$27.85
Camguard Aviation Oil Additive Pint
AircraftSpruce.com
$27.85
Camguard Aviation Oil Additive Pint
AircraftSpruce.com
$47.81
1 Gal. Oil Additive
Northern Safety Co., Inc.
30-day returns (most items)
$47.81
1 Gal. Oil Additive
Northern Safety Co., Inc.
30-day returns
$31.00
HKS ADD-II Engine Oil Additive 200Ml
Berry Performance Sales Ads
30-day returns (most items)
$31.00
HKS ADD-II Engine Oil Additive 200Ml
Berry Performance Sales Ads
30-day returns
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    Shop engine oil 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+
    $20.95
    COMP Cams 159: COMP Cams Engine Break-In Oil Additive
    Summit Racing
    246
    $20.95
    COMP Cams 159: COMP Cams Engine Break-In Oil Additive
    Summit Racing
    246
    $25.99
    Bars Leaks Oil Seal Engine Oil Burning & Leaking Repair, 16.9 Oz, OS-1
    Advance Auto Parts
    In store
    15% Off*
    Curbside
    $25.99
    Bars Leaks Oil Seal Engine Oil Burning & Leaking Repair, 16.9 Oz, OS-1
    Advance Auto Parts
    15% Off*
    $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*
    $9.99
    Rislone High Mileage Oil Supplement Stabilizer, 16.9 Oz, 4400
    Advance Auto Parts
    In store
    1
    Curbside
    $9.99
    Rislone High Mileage Oil Supplement Stabilizer, 16.9 Oz, 4400
    Advance Auto Parts
    1
    $19.99
    Slick 50 Engine Treatment 15 Oz
    Ace Hardware
    263
    $19.99
    Slick 50 Engine Treatment 15 Oz
    Ace Hardware
    263
    $12.97
    Storage Defender - Oil Additive | 1
    Driven Racing Oil LLC
    $12.97
    Storage Defender - Oil Additive | 1
    Driven Racing Oil LLC
    $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+
    $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+
    $56.99
    Crower 86092: Crower Zddplus Motor Oil Additive
    Summit Racing
    20
    $56.99
    Crower 86092: Crower Zddplus Motor Oil Additive
    Summit Racing
    20
    $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
    $79.90
    Archoil AR6500 Diesel Treatment (40 Oz) Two Pack - Treats 800 Gallons - Additive For All Diesel Vehicles
    Amazon.com
    1K+
    Free shipping
    $79.90
    Archoil AR6500 Diesel Treatment (40 Oz) Two Pack - Treats 800 Gallons - Additive For All Diesel Vehicles
    Amazon.com
    1K+
    $147.52
    True Brand Engine Max Treatment & Oil Stabilizer
    Santie Wholesale Oil Company
    $147.52
    True Brand Engine Max Treatment & Oil Stabilizer
    Santie Wholesale Oil Company
    $112.95
    Zmax 55-128 - Heavy Duty Multi-Purpose Formula For Engine & Fuel Systems - Easy To Use - Reduces Carbon Build-Up - Lubricates Metal - Improves Gas &
    Amazon.com
    445
    Free shipping
    $112.95
    Zmax 55-128 - Heavy Duty Multi-Purpose Formula For Engine & Fuel Systems - Easy To Use - Reduces Carbon Build-Up - Lubricates Metal - Improves Gas &
    Amazon.com
    445
    $32.99
    Prolube Oil Treatment 16 Oz, Increases Horsepower, Lowers Operating
    eBay
    $32.99
    Prolube Oil Treatment 16 Oz, Increases Horsepower, Lowers Operating
    eBay
    $50.39
    Hot Shot's Secret HSS64Z: Hot Shot's Secret Stiction Eliminator Oil Additive
    Summit Racing
    4
    $50.39
    Hot Shot's Secret HSS64Z: Hot Shot's Secret Stiction Eliminator Oil Additive
    Summit Racing
    4
    $33.13
    $44.40
    Tribotex Small Oil Additive Engine Treatment: Add To Engine Oil - Makes High New
    shedfriends
    25% off
    $33.13
    $44.40
    Tribotex Small Oil Additive Engine Treatment: Add To Engine Oil - Makes High New
    shedfriends
    $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