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$51.15
Sea Foam SF-16 Motor/Engine Treatment 6-PACK 16 Oz. Cans
Amazon.com
45
Free shipping
$51.15
Sea Foam SF-16 Motor/Engine Treatment 6-PACK 16 Oz. Cans
Amazon.com
45
$50.00
Liquimoly 3721 Engine Oil Additive
Amazon.com
1K+
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$50.00
Liquimoly 3721 Engine Oil Additive
Amazon.com
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$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
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Tribotex Nano Oil Additive Car Engine Treatment: Add To Engine Lube - Makes High Mileage Cars Like New With A Synthetic Material (Treats One Regular
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Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce
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Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce
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Hot Shot's Secret Friction Reducer FR3 1 Gallon Synthetic Oil Additive Protects Engine & Improves Performance, Friction Modifier For Gas & Deisel
Amazon.com
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Hot Shot's Secret Friction Reducer FR3 1 Gallon Synthetic Oil Additive Protects Engine & Improves Performance, Friction Modifier For Gas & Deisel
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$26.95
Starbrite Star Tron Enzyme Fuel Treatment, Small Engine Formula, 8 Fl Oz Treats Up To 48 Gallons Gas Additive Rejuvenates & Stabilizes Old Gasoline,
Amazon.com
5
Free shipping
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Starbrite Star Tron Enzyme Fuel Treatment, Small Engine Formula, 8 Fl Oz Treats Up To 48 Gallons Gas Additive Rejuvenates & Stabilizes Old Gasoline,
Amazon.com
5
$21.49
XADO EX120 Motor Oil Additive - Engine Restore - Ceramic-Metal Coating And Revitalizant - Oil Treatment For High Mileage Engines - Restores Worn
Amazon.com
179
$21.49
XADO EX120 Motor Oil Additive - Engine Restore - Ceramic-Metal Coating And Revitalizant - Oil Treatment For High Mileage Engines - Restores Worn
Amazon.com
179
$17.99
Motorcraft VC8 Diesel Engine Coolant Additive - 1 Pint(473 Ml)
Amazon.com
332
$17.99
Motorcraft VC8 Diesel Engine Coolant Additive - 1 Pint(473 Ml)
Amazon.com
332
$135.00
Sea Foam Motor Treatment Fuel & Oil Additive, SF16, 16 Oz, Pack Of 12
Amazon.com
1K+
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Sea Foam Motor Treatment Fuel & Oil Additive, SF16, 16 Oz, Pack Of 12
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$46.96
Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack , Yellow
Amazon.com
631
Free shipping
$46.96
Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack , Yellow
Amazon.com
631
$8.99
STA-BIL Start Your Engines! - Fixes Non-Running Engines - A Jump Start In A Can - Revitalizes Fuel System - Safe For 2 And 4-Cycle Engines - Ensures
Amazon.com
858
$8.99
STA-BIL Start Your Engines! - Fixes Non-Running Engines - A Jump Start In A Can - Revitalizes Fuel System - Safe For 2 And 4-Cycle Engines - Ensures
Amazon.com
858
$30.13
K-100 MG All-In-One Gasoline Fuel Treatment & Additive - Eliminates Water, Stabilizes Fuel, And Cleans Engine & Fuel Systems - 32 Oz. (K100-G)
Amazon.com
619
Free shipping
$30.13
K-100 MG All-In-One Gasoline Fuel Treatment & Additive - Eliminates Water, Stabilizes Fuel, And Cleans Engine & Fuel Systems - 32 Oz. (K100-G)
Amazon.com
619
$15.97
Dura Lube Engine Treatment | 32 Oz., Single
Amazon.com
453
$15.97
Dura Lube Engine Treatment | 32 Oz., Single
Amazon.com
453
$36.25
Marvel Mystery Oil Oil Additive, 1Gal, Red, Transparent
Amazon.com
237
Free shipping
$36.25
Marvel Mystery Oil Oil Additive, 1Gal, Red, Transparent
Amazon.com
237
$74.53
STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors & Injectors, Fixes Rough Running Engines, Eliminates Water, Carb Cleaner & Fuel
Amazon.com
2
Free shipping
$74.53
STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors & Injectors, Fixes Rough Running Engines, Eliminates Water, Carb Cleaner & Fuel
Amazon.com
2
$22.99
Lucas Oil Products Engine Break-In Oil Additive, 16 Oz, 10063
Advance Auto Parts
1K+
$22.99
Lucas Oil Products Engine Break-In Oil Additive, 16 Oz, 10063
Advance Auto Parts
1K+
$29.99
Motorkote Hyper Lubricant Engine Treatment, MK-HL16-06, 16-Ounce, Single
Amazon.com
3K+
$29.99
Motorkote Hyper Lubricant Engine Treatment, MK-HL16-06, 16-Ounce, Single
Amazon.com
3K+
$17.99
ENGINE BREAK-IN OIL ADDITIVE - TB ZINC PLUS 10063
Northwest Team Yota
1K+
$17.99
ENGINE BREAK-IN OIL ADDITIVE - TB ZINC PLUS 10063
Northwest Team Yota
1K+
$11.99
Atomoil Oil Additive For Car Engine And Protection | Nano Technology Motor High Mileage Treatment | Atomic Scale Protective Oil Treatment, 16 Oz.
Amazon.com
37
$11.99
Atomoil Oil Additive For Car Engine And Protection | Nano Technology Motor High Mileage Treatment | Atomic Scale Protective Oil Treatment, 16 Oz.
Amazon.com
37
$93.96
Lucas Oil 10016 Engine Oil Additive, Complete Engine Treatment, 16 Oz., Each
eBay.com
7
$93.96
Lucas Oil 10016 Engine Oil Additive, Complete Engine Treatment, 16 Oz., Each
eBay.com
7
$11.99
16 Oz Lucas Engine Break-In Oil Additive - ZDDP, Motor Oil Additive | Lucas Oil 10063-1
Summit Racing
110
$11.99
16 Oz Lucas Engine Break-In Oil Additive - ZDDP, Motor Oil Additive | Lucas Oil 10063-1
Summit Racing
110
$22.81
Lubegard 40902 Bio/Tech Engine Oil Protectant, 32 Oz.
Amazon.com
527
$22.81
Lubegard 40902 Bio/Tech Engine Oil Protectant, 32 Oz.
Amazon.com
527
$14.95
Liqui Moly Engine Oil Additive 250Ml - 20050 | Speedaddicts.Com
Speed Addicts
14
$14.95
Liqui Moly Engine Oil Additive 250Ml - 20050 | Speedaddicts.Com
Speed Addicts
14
$7.00
Sea Foam 16 Oz. Engine Treatment/Additive
iieemm.com
4K+
Free shipping
$7.00
Sea Foam 16 Oz. Engine Treatment/Additive
iieemm.com
4K+
$52.62
Rislone 4102 Engine Treatment Concentrate OIL Additive 16.9Oz. Case Of Six
USA eBay
Free shipping
$52.62
Rislone 4102 Engine Treatment Concentrate OIL Additive 16.9Oz. Case Of Six
USA eBay
Free shipping
$7.99
Rislone Engine Treatment Conditioner And Cleaner, 16.9 Oz, 4102
Advance Auto Parts
1K+
$7.99
Rislone Engine Treatment Conditioner And Cleaner, 16.9 Oz, 4102
Advance Auto Parts
1K+
$112.40
8X PACK KIT 300 Ml Can LIQUI MOLY ""GERMANY"" Engine Oil Additive Motor Oil Saver
eBay.com
15
Free shipping
$112.40
8X PACK KIT 300 Ml Can LIQUI MOLY ""GERMANY"" Engine Oil Additive Motor Oil Saver
eBay.com
15
$22.99
Slick 50 High Mileage Engine Treatment (15 Oz.), 750002
Advance Auto Parts
1K+
$22.99
Slick 50 High Mileage Engine Treatment (15 Oz.), 750002
Advance Auto Parts
1K+
$105.14
Liqui Moly Mos2 Anti Friction Engine Treatment Oil Additive - 300Ml
eBay
46
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$105.14
Liqui Moly Mos2 Anti Friction Engine Treatment Oil Additive - 300Ml
eBay
46
$59.99
Tribotex Small Oil Additive Engine Treatment: Add To Engine Oil - Makes High Mil
USA eBay
Free shipping
$59.99
Tribotex Small Oil Additive Engine Treatment: Add To Engine Oil - Makes High Mil
USA eBay
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$9.99
LIQUI MOLY Mos2 Anti-Friction Engine Treatment, 2009
Advance Auto Parts
5K+
$9.99
LIQUI MOLY Mos2 Anti-Friction Engine Treatment, 2009
Advance Auto Parts
5K+
$27.99
Camguard Aviation Oil Additive For Ultimate Engine Protection
Pilot Mall
$27.99
Camguard Aviation Oil Additive For Ultimate Engine Protection
Pilot Mall
$128.93
Lucas Oil Motor Additive, Pure Synthetic Oil Stabilizer, Synthetic, 1 Gal Jug, Each
Amazon.com
124
Free shipping
$128.93
Lucas Oil Motor Additive, Pure Synthetic Oil Stabilizer, Synthetic, 1 Gal Jug, Each
Amazon.com
124
$3.50
$4.46
Liqui Moly Additive Engine Oil 80Ml | 20196 | Partzilla
Partzilla
2
21% off
$3.50
$4.46
Liqui Moly Additive Engine Oil 80Ml | 20196 | Partzilla
Partzilla
2
$13.50
LIQUI MOLY Motor Oil Saver | 300 Ml | Oil Additive | SKU: 2020
Amazon.com
2K+
$13.50
LIQUI MOLY Motor Oil Saver | 300 Ml | Oil Additive | SKU: 2020
Amazon.com
2K+
$50.39
Hot Shot's Secret HSS64Z: Hot Shot's Secret Stiction Eliminator Oil Additive
Summit Racing
3
$50.39
Hot Shot's Secret HSS64Z: Hot Shot's Secret Stiction Eliminator Oil Additive
Summit Racing
3
13 Engine Additives That Work (And 5 That’ll Kill Your Car)
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Shop engine additives

Sponsored
About our ads
$30.13
K-100 MG All-In-One Gasoline Fuel Treatment & Additive - Eliminates Water, Stabilizes Fuel, And Cleans Engine & Fuel Systems - 32 Oz. (K100-G)
Amazon.com
619
Free shipping
$30.13
K-100 MG All-In-One Gasoline Fuel Treatment & Additive - Eliminates Water, Stabilizes Fuel, And Cleans Engine & Fuel Systems - 32 Oz. (K100-G)
Amazon.com
$15.97
Dura Lube Engine Treatment | 32 Oz., Single
Amazon.com
453
$15.97
Dura Lube Engine Treatment | 32 Oz., Single
Amazon.com
$36.25
Marvel Mystery Oil Oil Additive, 1Gal, Red, Transparent
Amazon.com
237
Free shipping
$36.25
Marvel Mystery Oil Oil Additive, 1Gal, Red, Transparent
Amazon.com
$74.53
STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors & Injectors, Fixes Rough Running Engines, Eliminates Water, Carb Cleaner & Fuel
Amazon.com
2
Free shipping
$74.53
STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors & Injectors, Fixes Rough Running Engines, Eliminates Water, Carb Cleaner & Fuel
Amazon.com
$22.99
Lucas Oil Products Engine Break-In Oil Additive, 16 Oz, 10063
Advance Auto Parts
1K+
$22.99
Lucas Oil Products Engine Break-In Oil Additive, 16 Oz, 10063
Advance Auto Parts
$29.99
Motorkote Hyper Lubricant Engine Treatment, MK-HL16-06, 16-Ounce, Single
Amazon.com
3K+
$29.99
Motorkote Hyper Lubricant Engine Treatment, MK-HL16-06, 16-Ounce, Single
Amazon.com
$17.99
ENGINE BREAK-IN OIL ADDITIVE - TB ZINC PLUS 10063
Northwest Team Yota
1K+
$17.99
ENGINE BREAK-IN OIL ADDITIVE - TB ZINC PLUS 10063
Northwest Team Yota
$11.99
Atomoil Oil Additive For Car Engine And Protection | Nano Technology Motor High Mileage Treatment | Atomic Scale Protective Oil Treatment, 16 Oz.
Amazon.com
37
$11.99
Atomoil Oil Additive For Car Engine And Protection | Nano Technology Motor High Mileage Treatment | Atomic Scale Protective Oil Treatment, 16 Oz.
Amazon.com
$93.96
Lucas Oil 10016 Engine Oil Additive, Complete Engine Treatment, 16 Oz., Each
eBay.com
7
$93.96
Lucas Oil 10016 Engine Oil Additive, Complete Engine Treatment, 16 Oz., Each
eBay.com
$11.99
16 Oz Lucas Engine Break-In Oil Additive - ZDDP, Motor Oil Additive | Lucas Oil 10063-1
Summit Racing
110
$11.99
16 Oz Lucas Engine Break-In Oil Additive - ZDDP, Motor Oil Additive | Lucas Oil 10063-1
Summit Racing
$22.81
Lubegard 40902 Bio/Tech Engine Oil Protectant, 32 Oz.
Amazon.com
527
$22.81
Lubegard 40902 Bio/Tech Engine Oil Protectant, 32 Oz.
Amazon.com
$14.95
Liqui Moly Engine Oil Additive 250Ml - 20050 | Speedaddicts.Com
Speed Addicts
14
$14.95
Liqui Moly Engine Oil Additive 250Ml - 20050 | Speedaddicts.Com
Speed Addicts
$7.00
Sea Foam 16 Oz. Engine Treatment/Additive
iieemm.com
4K+
Free shipping
$7.00
Sea Foam 16 Oz. Engine Treatment/Additive
iieemm.com
$52.62
Rislone 4102 Engine Treatment Concentrate OIL Additive 16.9Oz. Case Of Six
USA eBay
Free shipping
$52.62
Rislone 4102 Engine Treatment Concentrate OIL Additive 16.9Oz. Case Of Six
USA eBay
$7.99
Rislone Engine Treatment Conditioner And Cleaner, 16.9 Oz, 4102
Advance Auto Parts
1K+
$7.99
Rislone Engine Treatment Conditioner And Cleaner, 16.9 Oz, 4102
Advance Auto Parts
$112.40
8X PACK KIT 300 Ml Can LIQUI MOLY ""GERMANY"" Engine Oil Additive Motor Oil Saver
eBay.com
15
Free shipping
$112.40
8X PACK KIT 300 Ml Can LIQUI MOLY ""GERMANY"" Engine Oil Additive Motor Oil Saver
eBay.com
$22.99
Slick 50 High Mileage Engine Treatment (15 Oz.), 750002
Advance Auto Parts
1K+
$22.99
Slick 50 High Mileage Engine Treatment (15 Oz.), 750002
Advance Auto Parts
$105.14
Liqui Moly Mos2 Anti Friction Engine Treatment Oil Additive - 300Ml
eBay
46
Free shipping
$105.14
Liqui Moly Mos2 Anti Friction Engine Treatment Oil Additive - 300Ml
eBay

Shop engine additives

Sponsored
About our ads
$51.15
Sea Foam SF-16 Motor/Engine Treatment 6-PACK 16 Oz. Cans
Amazon.com
45
Free shipping
$51.15
Sea Foam SF-16 Motor/Engine Treatment 6-PACK 16 Oz. Cans
Amazon.com
45
$50.00
Liquimoly 3721 Engine Oil Additive
Amazon.com
1K+
Free shipping
$50.00
Liquimoly 3721 Engine Oil Additive
Amazon.com
1K+
$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+
$22.99
Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce
Amazon.com
1K+
$22.99
Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce
Amazon.com
1K+
$108.99
Hot Shot's Secret Friction Reducer FR3 1 Gallon Synthetic Oil Additive Protects Engine & Improves Performance, Friction Modifier For Gas & Deisel
Amazon.com
1K+
Free shipping
$108.99
Hot Shot's Secret Friction Reducer FR3 1 Gallon Synthetic Oil Additive Protects Engine & Improves Performance, Friction Modifier For Gas & Deisel
Amazon.com
1K+
$26.95
Starbrite Star Tron Enzyme Fuel Treatment, Small Engine Formula, 8 Fl Oz Treats Up To 48 Gallons Gas Additive Rejuvenates & Stabilizes Old Gasoline,
Amazon.com
5
Free shipping
$26.95
Starbrite Star Tron Enzyme Fuel Treatment, Small Engine Formula, 8 Fl Oz Treats Up To 48 Gallons Gas Additive Rejuvenates & Stabilizes Old Gasoline,
Amazon.com
5
$21.49
XADO EX120 Motor Oil Additive - Engine Restore - Ceramic-Metal Coating And Revitalizant - Oil Treatment For High Mileage Engines - Restores Worn
Amazon.com
179
$21.49
XADO EX120 Motor Oil Additive - Engine Restore - Ceramic-Metal Coating And Revitalizant - Oil Treatment For High Mileage Engines - Restores Worn
Amazon.com
179
$17.99
Motorcraft VC8 Diesel Engine Coolant Additive - 1 Pint(473 Ml)
Amazon.com
332
$17.99
Motorcraft VC8 Diesel Engine Coolant Additive - 1 Pint(473 Ml)
Amazon.com
332
$135.00
Sea Foam Motor Treatment Fuel & Oil Additive, SF16, 16 Oz, Pack Of 12
Amazon.com
1K+
Free shipping
$135.00
Sea Foam Motor Treatment Fuel & Oil Additive, SF16, 16 Oz, Pack Of 12
Amazon.com
1K+
$46.96
Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack , Yellow
Amazon.com
631
Free shipping
$46.96
Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack , Yellow
Amazon.com
631
$8.99
STA-BIL Start Your Engines! - Fixes Non-Running Engines - A Jump Start In A Can - Revitalizes Fuel System - Safe For 2 And 4-Cycle Engines - Ensures
Amazon.com
858
$8.99
STA-BIL Start Your Engines! - Fixes Non-Running Engines - A Jump Start In A Can - Revitalizes Fuel System - Safe For 2 And 4-Cycle Engines - Ensures
Amazon.com
858
$30.13
K-100 MG All-In-One Gasoline Fuel Treatment & Additive - Eliminates Water, Stabilizes Fuel, And Cleans Engine & Fuel Systems - 32 Oz. (K100-G)
Amazon.com
619
Free shipping
$30.13
K-100 MG All-In-One Gasoline Fuel Treatment & Additive - Eliminates Water, Stabilizes Fuel, And Cleans Engine & Fuel Systems - 32 Oz. (K100-G)
Amazon.com
619
$15.97
Dura Lube Engine Treatment | 32 Oz., Single
Amazon.com
453
$15.97
Dura Lube Engine Treatment | 32 Oz., Single
Amazon.com
453
$36.25
Marvel Mystery Oil Oil Additive, 1Gal, Red, Transparent
Amazon.com
237
Free shipping
$36.25
Marvel Mystery Oil Oil Additive, 1Gal, Red, Transparent
Amazon.com
237
$74.53
STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors & Injectors, Fixes Rough Running Engines, Eliminates Water, Carb Cleaner & Fuel
Amazon.com
2
Free shipping
$74.53
STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors & Injectors, Fixes Rough Running Engines, Eliminates Water, Carb Cleaner & Fuel
Amazon.com
2
$22.99
Lucas Oil Products Engine Break-In Oil Additive, 16 Oz, 10063
Advance Auto Parts
1K+
$22.99
Lucas Oil Products Engine Break-In Oil Additive, 16 Oz, 10063
Advance Auto Parts
1K+
$29.99
Motorkote Hyper Lubricant Engine Treatment, MK-HL16-06, 16-Ounce, Single
Amazon.com
3K+
$29.99
Motorkote Hyper Lubricant Engine Treatment, MK-HL16-06, 16-Ounce, Single
Amazon.com
3K+
$17.99
ENGINE BREAK-IN OIL ADDITIVE - TB ZINC PLUS 10063
Northwest Team Yota
1K+
$17.99
ENGINE BREAK-IN OIL ADDITIVE - TB ZINC PLUS 10063
Northwest Team Yota
1K+