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Automotive diesel additives: top picks

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Automotive diesel additives: top picks

AI-generated summary · updated August 7, 2026 · verify details before purchase.

  1. Liqui Moly Diesel Purge
    Best overall Liqui Moly

    Liqui Moly Diesel Purge

    4.6/5 $26.02

    Effectively cleans injectors and combustion chambers, restoring performance and reducing emissions.

    • Excellent cleaning power
    • Improves fuel economy
    • Easy to use
    • Requires direct injection into fuel filter
    View on Amazon manufacturer site
  2. Stanadyne Performance Formula
    Best for cetane boost Stanadyne

    Stanadyne Performance Formula

    4.5/5 $36.97

    Increases cetane for easier starts and smoother running, while cleaning and lubricating.

    • Cetane boost up to 7 numbers
    • Lubricates fuel system
    • Reduces smoke
    • More expensive than some additives
    View on Amazon manufacturer site
  3. Power Service Diesel Kleen + Cetane Boost
    Best value Power Service

    Power Service Diesel Kleen + Cetane Boost

    4.7/5 $97.87

    Cleans injectors, boosts cetane, and improves fuel economy at an affordable price.

    • Reliable performance
    • Good value
    • Winterized formula available
    View on Amazon manufacturer site
  4. Opti-Lube XPD
    Best for lubrication Opti-Lube

    Opti-Lube XPD

    4.8/5 $87.01

    High concentration of lubricity additives to protect fuel pumps and injectors.

    • Superior lubricity
    • Reduces wear
    • Works with biodiesel
    • Higher price point
    View on Amazon manufacturer site
  5. Hot Shot's Secret Diesel Extreme
    Best for cleaning Hot Shot's Secret

    Hot Shot's Secret Diesel Extreme

    4.6/5 $55.00

    Powerful detergent formula cleans injectors and prevents deposits, improving power and mileage.

    • Deep cleaning action
    • Restores lost power
    • Prevents future buildup
    • Not for long-term storage
    View on Amazon manufacturer site
  6. Howes Diesel Treat
    Best for anti-gel Howes

    Howes Diesel Treat

    4.4/5 $61.22

    Prevents fuel gelling in cold weather and cleans the fuel system.

    • Effective anti-gel
    • Improves cold starts
    • Cleans injectors
    • Less cetane boost
    • May not be needed in warm climates
    View on Amazon manufacturer site
  7. Archoil AR6500
    Best for fuel economy Archoil

    Archoil AR6500

    4.7/5 $79.90

    Reduces friction and improves combustion efficiency for better mileage and power.

    • Improves fuel economy
    • Reduces friction
    • Works with all diesel engines
    • May take a few tanks to see results
    View on Amazon manufacturer site

Buying tips

When choosing a diesel additive, consider your primary need: cetane boost for starting, lubricity for fuel pump protection, detergents for cleaning, or anti-gel for winter. Most all-in-one products offer a balance but specialized additives may perform better in specific areas. Always follow recommended dosage and check compatibility with your engine.

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