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The 8 Best Engine Additives

May 2024

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The Score indicates the overall value of the product.
The rating is based on multiple factors:
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and other indicators such as: Relative Price, Brand,
Reputation and more. Popularity

Based on thousands of discussions

 Opinions

Based on customer reviews

 Quality

Based on Expert reviews and articles

 Various Indicators

such as Brand reputation and relative price
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$17
$37+
Rank
Manufacturer
Product Name
Score
1
Best Engine Additives - Liqui Moly 20330 Hydraulic Lifter Additive Review Liqui Moly

Liqui Moly 20330 Hydraulic Lifter Additive (replaces LM 20004)

9 . 9
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View Product
2
Best Engine Additives - STA-BIL Fast Fix Small Engine Treatment - Cleans Review STA-BIL

STA-BIL Fast Fix Small Engine Treatment - Cleans Carbs and Injectors - Fixes Rough Running Engines - Eliminates Water - Treats 10 Gallons, 4 fl. oz. (22303)

By STA-BIL
9 . 6
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3
Best Engine Additives - Restore (00009) 4-Cylinder Formula Engine Restorer and Lubricant Review Restore

Restore (00009) 4-Cylinder Formula Engine Restorer and Lubricant - 9 oz.

By Restore
9 . 1
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4
Best Engine Additives - Restore (00016) 8-Cylinder Formula Engine Restorer and Lubricant Review Restore

Restore (00016) 8-Cylinder Formula Engine Restorer and Lubricant - 16 oz.

By Restore
8 . 8
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5
Best Engine Additives - Slick 50 (750002) Recharged High Mileage Engine Treatment Review Slick 50

Slick 50 (750002) Recharged High Mileage Engine Treatment - 15 oz.

8 . 5
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6
Best Engine Additives - Liqui Moly 20004 Hydraulic Lifter Additive Review Liqui Moly

Liqui Moly 20004 Hydraulic Lifter Additive

8 . 3
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7
Best Engine Additives - Lucas Oil 10063 Engine Break-In Oil Additive Review LUCAS

Lucas Oil 10063 Engine Break-In Oil Additive - 16 oz

By LUCAS
7 . 9
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8
Best Engine Additives - Liqui Moly 2037 Pro-Line Engine Flush - 500 Review Liqui Moly

Liqui Moly 2037 Pro-Line Engine Flush - 500 Milliliters

7 . 7
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Related Categories

Engine Oil Additives
Engine Oil Additives - Best Reviews Guide
Gasoline Additives
Gasoline Additives - Best Reviews Guide
Oil Additives
Oil Additives - Best Reviews Guide
Gas Additives
Gas Additives - Best Reviews Guide

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