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Sponsored
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$107.99
Slick 50 Original Engine Treatment | 32 Oz., 6-Pack
Amazon.com
Free shipping
$107.99
Slick 50 Original Engine Treatment | 32 Oz., 6-Pack
Amazon.com
Free shipping
$96.46
Slick 50 Supercharged Synthetic Engine Treatment | 15 Oz., 6-Pack
Amazon.com
Free shipping
$96.46
Slick 50 Supercharged Synthetic Engine Treatment | 15 Oz., 6-Pack
Amazon.com
Free shipping
$38.03
Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment, 32-Ounce, Single, Black
Amazon.com
2K+
Free shipping
$38.03
Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment, 32-Ounce, Single, Black
Amazon.com
2K+
$20.95
COMP Cams 159: COMP Cams Engine Break-In Oil Additive
Summit Racing
90-day returns (most items)
$20.95
COMP Cams 159: COMP Cams Engine Break-In Oil Additive
Summit Racing
90-day returns
$19.99
Slick 50 Engine Treatment 15 Oz
Ace Hardware
$19.99
Slick 50 Engine Treatment 15 Oz
Ace Hardware
$23.40
Lucas Oil Oil Stabilizer 051571 Replaces Lucas Oil:10001
Jacks Small Engines
$23.40
Lucas Oil Oil Stabilizer 051571 Replaces Lucas Oil:10001
Jacks Small Engines
$12.09
Bar's Leaks 16.9Oz Oil Seal Engine Oil Burning & Leak Repair (OS-1)
JBTools
60-day returns (most items)
$12.09
Bar's Leaks 16.9Oz Oil Seal Engine Oil Burning & Leak Repair (OS-1)
JBTools
60-day returns
$14.95
16 Oz. Lubricant - Power Plus Top Lube | Power Plus Lubricants 19769-18
Summit Racing
9
$14.95
16 Oz. Lubricant - Power Plus Top Lube | Power Plus Lubricants 19769-18
Summit Racing
9
$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*
$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+
$8.50
Lucas Oil 1 Qt. Engine Treatment/Additive
iverybers.com
Free shipping
$8.50
Lucas Oil 1 Qt. Engine Treatment/Additive
iverybers.com
Free shipping
$16.99
Lucas Oil Products Heavy Duty Oil Stabilizer: Extends Engine Life, 1 Quart, 10001
Advance Auto Parts
In store
Curbside
$16.99
Lucas Oil Products Heavy Duty Oil Stabilizer: Extends Engine Life, 1 Quart, 10001
Advance Auto Parts
$5.99
STP Oil Treatment - High-Viscosity Formula Formulated For High-Mileage Engines, 66079
Advance Auto Parts
In store
Curbside
$5.99
STP Oil Treatment - High-Viscosity Formula Formulated For High-Mileage Engines, 66079
Advance Auto Parts
$5.99
STP Oil Treatment 15.73 Oz
Ace Hardware
252
$5.99
STP Oil Treatment 15.73 Oz
Ace Hardware
252
$31.99
Hot Shot's Secret HSSFR332Z: Hot Shot's Secret FR3 Oil Additive
Summit Racing
2
$31.99
Hot Shot's Secret HSSFR332Z: Hot Shot's Secret FR3 Oil Additive
Summit Racing
2
$15.99
Lucas Oil Products Heavy Duty Oil Stabilizer Oil Stabilizer 32 Oz
Ace Hardware
$15.99
Lucas Oil Products Heavy Duty Oil Stabilizer Oil Stabilizer 32 Oz
Ace Hardware
$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
$19.45
Driven Racing Oil 12 Oz Coolant Additive Proprietary Formula Composition 50030 - 82451824
Penn Tool Co
$19.45
Driven Racing Oil 12 Oz Coolant Additive Proprietary Formula Composition 50030 - 82451824
Penn Tool Co
$7.00
Sea Foam 16 Oz. Engine Treatment/Additive
iverybers.com
Free shipping
$7.00
Sea Foam 16 Oz. Engine Treatment/Additive
iverybers.com
Free shipping
$39.40
Marvel Mystery Oil Oil Additive: Motor Treatment, 1 Gal Container Size Model: MM14R
Grainger
$39.40
Marvel Mystery Oil Oil Additive: Motor Treatment, 1 Gal Container Size Model: MM14R
Grainger
$16.58
AVBLEND Aircraft Engine Oil Additive - 12 Oz Bottle
SkyGeek.com
4
$16.58
AVBLEND Aircraft Engine Oil Additive - 12 Oz Bottle
SkyGeek.com
4
$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
$10.64
Marvel Mystery Oil Oil Additive: Motor Treatment, 32 Fl Oz Container Size Model: MM13R
Grainger
2K+
$10.64
Marvel Mystery Oil Oil Additive: Motor Treatment, 32 Fl Oz Container Size Model: MM13R
Grainger
2K+
$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
$11.20
Rislone Oil Additive: Engine Oil Supplement With Zinc Treatment, 11 Fl Oz Container Size Model: 4405
Grainger
2K+
$11.20
Rislone Oil Additive: Engine Oil Supplement With Zinc Treatment, 11 Fl Oz Container Size Model: 4405
Grainger
2K+
$34.89
$41.87
Tribotex Small Oil Additive Engine Treatment: Add To Engine Oil - Makes High New
Peppytrend Online
16% off
$34.89
$41.87
Tribotex Small Oil Additive Engine Treatment: Add To Engine Oil - Makes High New
Peppytrend Online
$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
$12.98
Bar's Leaks 1000 High Mileage Engine Repair, Automotive Additive, 16.9 Oz
Walmart
In store
Curbside
$12.98
Bar's Leaks 1000 High Mileage Engine Repair, Automotive Additive, 16.9 Oz
Walmart
$12.97
Storage Defender - Oil Additive | 1
Driven Racing Oil LLC
$12.97
Storage Defender - Oil Additive | 1
Driven Racing Oil LLC
$10.09
$11.09
JEGS Break-In/Engine Oil Supplement [12 Oz. Bottle]
JEGS High Performance
$10.09
$11.09
JEGS Break-In/Engine Oil Supplement [12 Oz. Bottle]
JEGS High Performance
$12.99
$17.99
Eastwood 4Oz. ZDDP Oil Additive
CJ Pony Parts
27% off
$12.99
$17.99
Eastwood 4Oz. ZDDP Oil Additive
CJ Pony Parts
$82.25
LYCOMING Engines LW-16702 Engine Oil Additive - 6 Oz Bottle
SkyGeek.com
$82.25
LYCOMING Engines LW-16702 Engine Oil Additive - 6 Oz Bottle
SkyGeek.com
$50.77
$68.54
Zddpplus ZDDP Engine Oil Additive Zinc Phosphorus 5 Bottle Pkg Pack Of 2
versactfit
25% off
$50.77
$68.54
Zddpplus ZDDP Engine Oil Additive Zinc Phosphorus 5 Bottle Pkg Pack Of 2
versactfit
$124.24
TKO Engine Oil Treatment 1 Gallon
americanvaluesproducts.com
30-day returns (most items)
$124.24
TKO Engine Oil Treatment 1 Gallon
americanvaluesproducts.com
30-day returns
$29.95
X-1R Engine Treatment Oil Additive Concentrate 8 FL OZ
Walmart
$29.95
X-1R Engine Treatment Oil Additive Concentrate 8 FL OZ
Walmart
$12.99
$17.99
Eastwood 4 Oz. ZDDP Oil Additive
Classic Muscle Parts
27% off
$12.99
$17.99
Eastwood 4 Oz. ZDDP Oil Additive
Classic Muscle Parts
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    Shop engine oil additives

    Sponsored
    About our ads
    $107.99
    Slick 50 Original Engine Treatment | 32 Oz., 6-Pack
    Amazon.com
    Free shipping
    $107.99
    Slick 50 Original Engine Treatment | 32 Oz., 6-Pack
    Amazon.com
    Free shipping
    $96.46
    Slick 50 Supercharged Synthetic Engine Treatment | 15 Oz., 6-Pack
    Amazon.com
    Free shipping
    $96.46
    Slick 50 Supercharged Synthetic Engine Treatment | 15 Oz., 6-Pack
    Amazon.com
    Free shipping
    $38.03
    Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment, 32-Ounce, Single, Black
    Amazon.com
    2K+
    Free shipping
    $38.03
    Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment, 32-Ounce, Single, Black
    Amazon.com
    2K+
    $20.95
    COMP Cams 159: COMP Cams Engine Break-In Oil Additive
    Summit Racing
    90-day returns (most items)
    $20.95
    COMP Cams 159: COMP Cams Engine Break-In Oil Additive
    Summit Racing
    90-day returns
    $19.99
    Slick 50 Engine Treatment 15 Oz
    Ace Hardware
    $19.99
    Slick 50 Engine Treatment 15 Oz
    Ace Hardware
    $23.40
    Lucas Oil Oil Stabilizer 051571 Replaces Lucas Oil:10001
    Jacks Small Engines
    $23.40
    Lucas Oil Oil Stabilizer 051571 Replaces Lucas Oil:10001
    Jacks Small Engines
    $12.09
    Bar's Leaks 16.9Oz Oil Seal Engine Oil Burning & Leak Repair (OS-1)
    JBTools
    60-day returns (most items)
    $12.09
    Bar's Leaks 16.9Oz Oil Seal Engine Oil Burning & Leak Repair (OS-1)
    JBTools
    60-day returns
    $14.95
    16 Oz. Lubricant - Power Plus Top Lube | Power Plus Lubricants 19769-18
    Summit Racing
    9
    $14.95
    16 Oz. Lubricant - Power Plus Top Lube | Power Plus Lubricants 19769-18
    Summit Racing
    9
    $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*
    $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+
    $8.50
    Lucas Oil 1 Qt. Engine Treatment/Additive
    iverybers.com
    Free shipping
    $8.50
    Lucas Oil 1 Qt. Engine Treatment/Additive
    iverybers.com
    Free shipping
    $16.99
    Lucas Oil Products Heavy Duty Oil Stabilizer: Extends Engine Life, 1 Quart, 10001
    Advance Auto Parts
    In store
    Curbside
    $16.99
    Lucas Oil Products Heavy Duty Oil Stabilizer: Extends Engine Life, 1 Quart, 10001
    Advance Auto Parts
    $5.99
    STP Oil Treatment - High-Viscosity Formula Formulated For High-Mileage Engines, 66079
    Advance Auto Parts
    In store
    Curbside
    $5.99
    STP Oil Treatment - High-Viscosity Formula Formulated For High-Mileage Engines, 66079
    Advance Auto Parts
    $5.99
    STP Oil Treatment 15.73 Oz
    Ace Hardware
    252
    $5.99
    STP Oil Treatment 15.73 Oz
    Ace Hardware
    252
    $31.99
    Hot Shot's Secret HSSFR332Z: Hot Shot's Secret FR3 Oil Additive
    Summit Racing
    2
    $31.99
    Hot Shot's Secret HSSFR332Z: Hot Shot's Secret FR3 Oil Additive
    Summit Racing
    2
    $15.99
    Lucas Oil Products Heavy Duty Oil Stabilizer Oil Stabilizer 32 Oz
    Ace Hardware
    $15.99
    Lucas Oil Products Heavy Duty Oil Stabilizer Oil Stabilizer 32 Oz
    Ace Hardware
    $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
    $19.45
    Driven Racing Oil 12 Oz Coolant Additive Proprietary Formula Composition 50030 - 82451824
    Penn Tool Co
    $19.45
    Driven Racing Oil 12 Oz Coolant Additive Proprietary Formula Composition 50030 - 82451824
    Penn Tool Co