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Diesel Additives

Diesel Additives

Schaeffer’s fuel additives are a great way to boost engine performance.

Schaeffer will protect your diesel engine is 365 days a year. These additives:

  • Can increase the cetane rating up to 4 points.
  • Clean-up  and help keep clean the Injectors .
  • Clean up gums and varnish found in todays ULSD fuel. 
  • Provide increased fuel economy and maintain engine power.
  • Reduce emissions and black smoke.
  • Add lubricity to provide protection for injectors and fuel pumps.
  • Helps reduce oxidation during extended storage. 
  • Will give rust and corrosion protection to your fuel system.
  • And much more!

At pennies per gallon, can you afford not to?

  • Product
  • Qty in Cart
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  • Schaeffer's 0132-006 Moly EP Engine Oil Treatment (6-Gallons)

    Schaeffer 132-006 Moly EP Engine Oil Treatment (6-Gallons)

    Schaeffer Mfg Co.

    $389.99
    Save 10% when you buy 2! Schaeffer's 132 Moly EP (Extreme Pressure) Engine Oil Treatment (6x1 gallon case) is a highly fortified extreme pressure engine oil treatment. Moly EP Oil Treatment contains an advanced specialized additive...
    $389.99
    Qty in Cart: 0
    Quantity:
    Price:
    $389.99
    Subtotal:
  • Schaeffer 0137CTPSC-005 CarbonTreat Premium Summer (Extra Cetane) Diesel Treatment (5-Gallon pail)

    Schaeffer 137CTPSC-005 CarbonTreat Premium Summer (Extra Cetane) (5-Gallons)

    Schaeffer Mfg Co.

    $522.99
    Save 10% when you buy 2! Schaeffer's 137CTPSC CarbonTreat™ Premium Summer Diesel Treatment with EXTRA CETANE (5-Gallons) is a multi functional, ultra-low sulfur compliant diesel fuel additive. It is formulated to prevent and control the...
    $522.99
    Qty in Cart: 0
    Quantity:
    Price:
    $522.99
    Subtotal:
  • Schaeffer 0137CTPS-004 CarbonTreat Premium Summer Diesel Treatment (4-Gallon case)

    Schaeffer 137CTPS-004 CarbonTreat Premium Summer (4-Gallons)

    Schaeffer Mfg Co.

    $384.36
    Save 10% when you buy 2! Schaeffer's 137CTPS CarbonTreat™ Premium Summer Diesel Treatment (4-Gallons) is a multi functional, ultra-low sulfur compliant diesel fuel additive. It is formulated to prevent and control the formation of asphaltenes...
    $384.36
    Qty in Cart: 0
    Quantity:
    Price:
    $384.36
    Subtotal:
  • Schaeffer 0137CTPW-004 CarbonTreat Premium Winter Diesel Treatment (4-Gallon case)

    Schaeffer 137CTPW-004 CarbonTreat Premium Winter (4-Gallons)

    Schaeffer Mfg Co.

    $319.76
    Save 10% when you buy 3! Schaeffer's 137CTPW CarbonTreat™ Premium Winter Diesel Treatment (4-Gallons) is a multifunctional, ultra-low sulfur compliant diesel fuel additive.  It is formulated to prevent and control the formation...
    $319.76
    Qty in Cart: 0
    Quantity:
    Price:
    $319.76
    Subtotal:
  • On Sale
    Schaeffer 0300ULSW-004 Arctic Shield + Ultra Low Sulfur Concentrate (4-Gallon case)

    Schaeffer 300ULSW-004 Arctic Shield (4-Gallons)

    Schaeffer Mfg Co.

    Now: $264.89
    Was: $339.88
    Save 10% when you buy 3! Schaeffer's 300ULSW Arctic Shield + Ultra Low Sulfur (4-Gallons) is a highly concentrated ashless diesel fuel additive. It is specifically formulated to provide Ultra Low Sulfur Diesel Fuel with maximum cold temperature...
    Now: $264.89
    Was: $339.88
    Qty in Cart: 0
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    Now: $264.89
    Was: $339.88
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  • On Sale
    Schaeffer 0137ULSW-004 Diesel Treat 2000 Ultra Low Sulfur Winter Premium (4-Gallon case)

    Schaeffer 137ULSW-004 Diesel Treat 2000 Ultra Low Sulfur Winter (4-Gallons)

    Schaeffer Mfg Co.

    Now: $255.99
    Was: $348.96
    Save 10% when you buy 3! Schaeffer's 137ULSW Diesel Treat 2000 Ultra Low Sulfur Winter Premium (4-Gallons) fuel additive is specially formulated to provide diesel fuel with maximum cold temperature protection against fuel gelling, waxing and...
    Now: $255.99
    Was: $348.96
    Qty in Cart: 0
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    Price:
    Now: $255.99
    Was: $348.96
    Subtotal:
  • On Sale
    Schaeffer 0137CTPWC-005 CarbonTreat Premium Winter Diesel Treatment (Extra Cetane) (5-Gallon pail)

    Schaeffer 137CTPWC-005 CarbonTreat Premium Winter (Extra Cetane) (5-Gallons)

    Schaeffer Mfg Co.

    Now: $417.95
    Was: $439.73
    Save 10% when you buy 2! Schaeffer's 137CTPWC CarbonTreat™ Premium Winter Diesel Treatment with EXTRA CETANE (5-Gallons) is a multifunctional, ultra-low sulfur compliant diesel fuel additive.  It is formulated to prevent and...
    Now: $417.95
    Was: $439.73
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $417.95
    Was: $439.73
    Subtotal:
  • On Sale
    Schaeffer 0137SUM-004 Diesel Treat 2000 Ultra Low Sulfur Summer (4-Gallon case)

    Schaeffer 137SUM-004 Diesel Treat 2000 Ultra Low Sulfur Summer (4-Gallons)

    Schaeffer Mfg Co.

    Now: $299.99
    Was: $306.88
    Save 10% when you buy 3! Schaeffer 137SUM Diesel Treat 2000 Ultra Low Sulfur Summer (4-Gallons) is: multi-functional, ultra low sulfur compliant, all season, economical, premium diesel fuel additive. It is specifically formulated to...
    Now: $299.99
    Was: $306.88
    Qty in Cart: 0
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    Now: $299.99
    Was: $306.88
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  • Schaeffer 0137B-004 Diesel Treat 2000™ Ultra Low Sulfur All Season (4-Gallon case)

    Schaeffer 137B-004 Diesel Treat 2000 Ultra Low Sulfur Winter (4-Gallons)

    Schaeffer Mfg Co.

    $289.78
    Save 10% when you buy 3! Schaeffer's 137B Diesel Treat 2000™ Ultra Low Sulfur Winter (4-Gallons) is a multi-functional, ashless, ALL SEASON (INCLUDING WINTER) fuel additive. It is specially formulated for use with all types of...
    $289.78
    Qty in Cart: 0
    Quantity:
    Price:
    $289.78
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  • On Sale
    Schaeffer 0137CTPA-042 CarbonTreat™ Premium All Season Diesel Treatment (24-pint case)

    Schaeffer 137CTPA-042 CarbonTreat Premium All Season (24-pints)

    Schaeffer Mfg Co.

    Now: $548.67
    Was: $689.46
    Save 10% when you buy 2! Schaeffer's 137CTPA CarbonTreat™ Premium All Season Diesel Treatment (24-Pints) is a multi-functional, ultra-low sulfur compliant diesel fuel additive. It is formulated to prevent and control the formation of...
    Now: $548.67
    Was: $689.46
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $548.67
    Was: $689.46
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  • Schaeffer 0139A-004 SoyShield All Season Diesel Fuel Additive (4-Gallon case)

    Schaeffer 139A-004 SoyShield All Season Diesel (4-Gallons)

    Schaeffer Mfg Co.

    $244.88
    Save 10% when you buy 4! Schaeffer's 139A SoyShield® All Season Diesel Fuel Additive (4 Gallons) is a concentrated multi-functional premium diesel fuel additive.  It is specially formulated for use in all types of diesel, especially low...
    $244.88
    Qty in Cart: 0
    Quantity:
    Price:
    $244.88
    Subtotal:
  • On Sale
    Schaeffer 0139A-042 SoyShield All Season Diesel Fuel Additive (24-pint case)

    Schaeffer 139A-042 SoyShield All Season Diesel (24-pints)

    Schaeffer Mfg Co.

    Now: $248.85
    Was: $318.19
    Save 10% when you buy 3! Schaeffer's 139A SoyShield® All Season Diesel Fuel Additive (24 Pints) is a concentrated multi-functional premium diesel fuel additive.  It is specially formulated for use in all types of diesel, especially low...
    Now: $248.85
    Was: $318.19
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $248.85
    Was: $318.19
    Subtotal:
  • Schaeffer 0141-003 Bio-Treat Premium Diesel Fuel Treatment (2x2.5 Gallons case)

    Schaeffer 141-003 Bio-Treat Premium Diesel (2x2.5 Gallons)

    Schaeffer Mfg Co.

    $456.96
    Save 10% when you buy 2! Schaeffer's 141 Bio-Treat Premium Diesel Fuel Treatment (2x2.5-Gallons) is a multi-functional biodiesel fuel additive. It is specially formulated to provide stability and control of many of the problems...
    $456.96
    Qty in Cart: 0
    Quantity:
    Price:
    $456.96
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  • On Sale
    Schaeffer 0137ND-004 Diesel Treat 2000™ Ultra Low Sulfur (4-Gallon case)

    Schaeffer 137ND-004 Diesel Treat 2000 Ultra Low Sulfur (4-Gallons)

    Schaeffer Mfg Co.

    Now: $296.32
    Was: $343.64
    Save 10% when you buy 3! Schaeffer's 137ND Diesel Treat 2000™ Ultra Low Sulfur (4-Gallons) is an ashless, all-season fuel additive. It is formulated for use with all types of diesel fuel, especially low sulfur and ultra low...
    Now: $296.32
    Was: $343.64
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $296.32
    Was: $343.64
    Subtotal:
  • On Sale
    Schaeffer 0137-042 Diesel Treat 2000™ Ultra Low Sulfur (24-Pint case)

    Schaeffer 137-042 Diesel Treat 2000 Ultra Low Sulfur (24-Pints)

    Schaeffer Mfg Co.

    Now: $298.76
    Was: $349.99
    Save 8% when you buy 3! Schaeffer's 137 Diesel Treat 2000™ Ultra Low Sulfur (24-Pints) is an ashless, all-season fuel additive. It is formulated for use with all types of diesel fuel, especially low sulfur and ultra low sulfur...
    Now: $298.76
    Was: $349.99
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $298.76
    Was: $349.99
    Subtotal:
  • On Sale
    Schaeffer 0131-004 Neutra™ Fuel Stabilizer (4-Gallon case)

    Schaeffer 131-004 Neutra Fuel Stabilizer (4-Gallons)

    Schaeffer Mfg Co.

    Now: $199.99
    Was: $222.32
    Save 10% when you buy 5! Schaeffer's 131 Neutra™ Fuel Stabilizer (4-Gallons) is a highly concentrated, multi-functional, ashless fuel stabilizer. It is specially formulated for use in all grades of gasoline (including ethanol-blends), as...
    Now: $199.99
    Was: $222.32
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $199.99
    Was: $222.32
    Subtotal:
  • On Sale
    Schaeffer 0132-005 Moly EP Engine Oil Treatment (5-Gallon pail)

    Schaeffer 132-005 Moly EP Engine Oil Treatment (5-Gallons)

    Schaeffer Mfg Co.

    Now: $324.78
    Was: $379.89
    Save 10% when you buy 3! Schaeffer's 132 Moly EP (Extreme Pressure) Engine Oil Treatment (5-gallons) is a highly fortified extreme pressure engine oil treatment. Moly EP Oil Treatment contains an advanced specialized additive package. The...
    Now: $324.78
    Was: $379.89
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $324.78
    Was: $379.89
    Subtotal:
  • On Sale
    Schaeffer 0132-023 Moly EP Engine Oil Treatment (24-Pint case)

    Schaeffer 132-023 Moly EP Engine Oil Treatment (24-Pints)

    Schaeffer Mfg Co.

    Now: $248.99
    Was: $292.36
    Save 8% when you buy 3! Schaeffer's 132 Moly EP (Extreme Pressure) Engine Oil Treatment (24-pints) is a highly fortified extreme pressure engine oil treatment. Moly EP Oil Treatment contains an advanced specialized additive package. The...
    Now: $248.99
    Was: $292.36
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $248.99
    Was: $292.36
    Subtotal:
  • On Sale
    Schaeffer 0301-004 Tank Dry Fuel Treatment (4-Gallon case)

    Schaeffer 301-004 Tank Dry Fuel Treatment (4-Gallons)

    Schaeffer Mfg Co.

    Now: $269.99
    Was: $355.00
    Save 10% when you buy 3! Schaeffer's 301 Tank Dry Fuel Treatment (4-Gallons) is a moisture inhibiting fuel additive that is formulated for use in ALL types of fuels.  It can be used in bio-diesel, gasoline and ethanol blends. When...
    Now: $269.99
    Was: $355.00
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $269.99
    Was: $355.00
    Subtotal:
  • On Sale
    Schaeffer 0285-013 Diesel Fuel Shock (12-pint case)

    Schaeffer 285-013 Fuel Shock (12-Pints)

    Schaeffer Mfg Co.

    Now: $538.42
    Was: $575.77
    Save 10% when you buy 2! Schaeffer's 285 Diesel Fuel Shock (12-Pints) is a: dual phase, oil soluble, water soluble, potent broad-spectrum biocide. It is designed to kill, prevent and control bacterial and fungal growth that can occur...
    Now: $538.42
    Was: $575.77
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $538.42
    Was: $575.77
    Subtotal:
  • On Sale
    Schaeffer 0285-004 Diesel Fuel Shock (4-Gallon case)

    Schaeffer 285-004 Fuel Shock (4-Gallons)

    Schaeffer Mfg Co.

    Now: $567.98
    Was: $625.76
    Save 10% when you buy 2! Schaeffer's 285 Diesel Fuel Shock (4-Gallons) is a: dual phase, oil soluble, water soluble, potent broad-spectrum biocide. It is designed to kill, prevent and control bacterial and fungal growth that can occur...
    Now: $567.98
    Was: $625.76
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $567.98
    Was: $625.76
    Subtotal:
  • On Sale
    Schaeffer 0137ULSW-042 Diesel Treat 2000 Ultra Low Sulfur Winter Premium (24-Pint case)

    Schaeffer 137ULSW-042 Diesel Treat 2000 Ultra Low Sulfur Winter (24-Pints)

    Schaeffer Mfg Co.

    Now: $322.68
    Was: $428.39
    Save 10% when you buy 2! Schaeffer's 137ULSW Diesel Treat 2000 Ultra Low Sulfur Winter Premium (24-Pints) fuel additive is specially formulated to provide diesel fuel with maximum cold temperature protection against fuel gelling, waxing and...
    Now: $322.68
    Was: $428.39
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $322.68
    Was: $428.39
    Subtotal:
  • On Sale
    Schaeffer 0300ULSW-042 Arctic Shield + Ultra Low Sulfur Concentrate (24-Pint case)

    Schaeffer 300ULSW-042 Arctic Shield (24-Pints)

    Schaeffer Mfg Co.

    Now: $258.32
    Was: $308.89
    Schaeffer's 300ULSW Arctic Shield + Ultra Low Sulfur (24-Pints) is a highly concentrated ashless diesel fuel additive. It is specifically formulated to provide Ultra Low Sulfur Diesel Fuel with maximum cold temperature protection against fuel...
    Now: $258.32
    Was: $308.89
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $258.32
    Was: $308.89
    Subtotal:
  • Schaeffer 0284-012 Diesel Hotline (12-Quart case)

    Schaeffer 284-012 Diesel Hotline (12-Quarts)

    Schaeffer Mfg Co.

    $209.98
    Save 10% when you buy 4! Schaeffer's 0284-012 Diesel Hotline (12-Quarts) is an emergency treatment for gelled diesel fuel. This quick-acting additive dissolves gelled diesel fuel back into solution and returns the flow in 20 minutes. It is...
    $209.98
    Qty in Cart: 0
    Quantity:
    Price:
    $209.98
    Subtotal:
  • Schaeffer 0131-021 Neutra™ Fuel Stabilizer (24-12oz case)

    Schaeffer 131-021 Neutra Fuel Stabilizer (24-12oz Bottles)

    Schaeffer Mfg Co.

    $238.67
    Save 10% when you buy 3! Schaeffer's 131 Neutra™ Fuel Stabilizer (24-12 oz. bottles) is a highly concentrated, multi-functional, ashless fuel stabilizer. It is specially formulated for use in all grades of gasoline (including ethanol-blends),...
    $238.67
    Qty in Cart: 0
    Quantity:
    Price:
    $238.67
    Subtotal:
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