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Heavy-Duty Diesel

Heavy-Duty Diesel

Schaeffer's Heavy Duty Diesel Engine Oils Unlock Maximum Protection

 

When it comes to keeping your heavy-duty diesel equipment running at peak performance, you need engine oils that can withstand the toughest conditions. That's where Schaeffer's engine oils shine.

Engineered for Maximum Protection

Schaeffer’s heavy-duty diesel engine oils are formulated to provide unparalleled protection against the most common issues that plague diesel engines:

  • Wear: Schaeffer's proprietary friction modifiers create a slippery, tenacious shield that prevents metal-to-metal contact, significantly reducing wear and extending engine life.
  • Oxidation: An advanced additive package neutralizes harmful oxidation, ensuring your engine oil maintains its integrity even under extreme operating conditions.
  • Sludge: Say goodbye to troublesome sludge buildup with a powerful detergent and dispersant additives that keep your engine clean and running smoothly.
  • Soot Contamination: Schaeffer's engine oils are designed to resist the effects of soot, preventing it from compromising your oil's performance.
  • Aeration: Specialized anti-foam agents in Schaeffer’s formulas prevent air entrainment, ensuring optimal oil flow and consistent lubrication.
  • Viscosity Control: Advanced formulations ensure your oil stays in grade for the life of the lubricant, providing unparalleled protection against wear and tear.

Proven Performance, Unmatched Durability

When you choose Schaeffer's engine oils, you're investing in the long-term health and longevity of your heavy-duty diesel equipment. Schaeffer’s proprietary Micron Moly® and Penetro® additives create a slick, protective barrier that withstands even the harshest and most extreme duty operating conditions.

Don't just take our word for it. Schaeffer's engine oils are routinely tested by independent laboratories, and the results consistently demonstrate real-world savings and protection. Schaeffer’s products have been trusted by discerning customers for decades, and we're confident they'll deliver the same outstanding performance for you.

Upgrade to Schaeffer's engine oils and experience the difference. Your engine will thank you with improved efficiency, reduced maintenance costs, and uncompromising reliability. Make the switch today and unlock the full potential of your vehicle or fleet.

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Bulk discounts on multiples of one item to save even more. Yes, bulk discounts are added to Sale items pricing!

  • Product
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  • Schaeffer 9020-012 Advanced Light Duty Diesel Performance 0W-20 (12 Quarts)

    Schaeffer 9020-012 Advanced Light Duty Diesel 0W-20 |12-Quarts

    Schaeffer Mfg Co.

    $214.34
    Save 10% when you buy 4! Schaeffer's 9020 Advanced Light Duty Diesel Performance 0W-20 (12-Quarts) is a premium quality full synthetic, multi-grade engine oil that is specifically formulated and suitable for use in vehicles that require...
    $214.34
    Qty in Cart: 0
    Quantity:
    Price:
    $214.34
    Subtotal:
  • Schaeffer 9020-005 Advanced Light Duty Diesel Performance 0W-20 (5-Gallons)

    Schaeffer’s 9020-005 Advanced Light Duty Diesel 0W-20 | 5-Gallons

    Schaeffer Mfg Co.

    $294.76
    Save 10% when you buy 3! Schaeffer's 9020 Advanced Light Duty Diesel Performance 0W-20 (5-Gallons) is a premium quality full synthetic, multi-grade engine oil that is specifically formulated and suitable for use in vehicles that require...
    $294.76
    Qty in Cart: 0
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    Price:
    $294.76
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  • Schaeffer 671-005 Supreme DD Diesel Oil SAE 40 (5-Gallons)

    Schaeffer 671 Supreme DD Diesel Oil SAE 40 | 5-G

    Schaeffer Mfg Co.

    $269.89
    NEW ITEM Save 10% when you buy 4! Schaeffer's 671 Supreme 2-Stroke DD Diesel Engine Oil SAE 40 (5-Gallons) is a super high-performance, para-synthetic, monograde, diesel engine oil for use in 2-stroke and 4-stroke diesel engines. Supreme 2-Stroke...
    $269.89
    Qty in Cart: 0
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    $269.89
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  • Schaeffer 700CK4-003 SynShield Durability Advantage 15W-40 (2x2.5 Gallons)

    Schaeffer 700CK4-003 SynShield Durability Advantage 15W-40 | 2x2.5G

    Schaeffer Mfg Co.

    $238.99
    NEW SIZE PACKAGING Save 10% when you buy 4! Schaeffer's 700 SynShield® Durability Advantage Diesel Engine Oil 15W-40 (2x2.5- Gallons) provides excellent equipment durability and longevity even during harsh, extreme duty operating...
    $238.99
    Qty in Cart: 0
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    $238.99
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  • Schaeffer's Break-In Oil SAE 30 (5-Gallons)

    Schaeffer's 108 Break-In Oil SAE 30 | 5-Gallons

    Schaeffer Mfg Co.

    $234.99
    Save 10% when you buy 4! Schaeffer's 108 Break-In Oil SAE 30 is a fully formulated, balanced, high zinc engine oil. This Break-In oil contains 1650-2250ppm of Zinc and 1650-2250ppm of Phosphorus. It is designed to provide excellent wear control to...
    $234.99
    Qty in Cart: 0
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    $234.99
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  • Schaeffer 9000-0012 SynShield® OTR Plus Full Synthetic CK-4 5W-40 (12-Quarts)

    Schaeffer 9000CK4-012 SynShield OTR Plus Full Syn 5W-40 | 12-QT

    Schaeffer Mfg Co.

    $182.22
    Schaeffer's 9000 SynShield® OTR Plus Full Synthetic CK-4 5W-40 (12-Quarts) is specially formulated to provide maximum protection against wear, oxidation, deposit formation, soot contamination and aeration. SynShield™ OTR Plus SAE 5W-40...
    $182.22
    Qty in Cart: 0
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    Price:
    $182.22
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  • On Sale
    Schaeffer 9000-005 SynShield® OTR Plus Full Synthetic CK-4 5W-40 (5-Gallons)

    Schaeffer 9000CK4-005 SynShield OTR Plus Full Syn 5W-40 | 5-G

    Schaeffer Mfg Co.

    Now: $264.49
    Was: $279.56
    Save 10% when you buy 3! Schaeffer's 9000 SynShield® OTR Plus Full Synthetic CK-4 5W-40 (5-Gallons) is specially formulated to provide maximum protection against wear, oxidation, deposit formation, soot contamination and aeration...
    Now: $264.49
    Was: $279.56
    Qty in Cart: 0
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    Now: $264.49
    Was: $279.56
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  • On Sale
    Schaeffer 9000CK4-006 SynShield® OTR Plus Full Synthetic 5W-40 (6-Gallons)

    Schaeffer 9000CK4-006 SynShield OTR Plus Full Syn 5W-40 | 6-GC

    Schaeffer Mfg Co.

    Now: $294.89
    Was: $318.16
    Save 8% when you buy 3! Schaeffer's 9000 SynShield® OTR Plus Full Synthetic CK-4 5W-40 (6-Gallons) is specially formulated to provide maximum protection against wear, oxidation, deposit formation, soot contamination and aeration...
    Now: $294.89
    Was: $318.16
    Qty in Cart: 0
    Quantity:
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    Now: $294.89
    Was: $318.16
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  • Schaeffer 6000-006 SynShield® Max MPG Diesel Engine Oil 10W-30 FA-4 (6-Gallons)

    Schaeffer 6000-006 SynShield® Max MPG 10W-30 FA-4 (6-Gallons)

    Schaeffer Mfg Co.

    $314.46
    Save 10% when you buy 3! Schaeffer's 6000 SynShield® Max MPG Diesel Engine Oil SAE10W-30 FA-4 (6-Gallons) is a premium, advanced performance, synthetic plus, heavy-duty diesel engine oil. It is specially formulated to provide maximum...
    $314.46
    Qty in Cart: 0
    Quantity:
    Price:
    $314.46
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  • Schaeffer 0723-005 SynShield Ultra Performance 5W-30 CK-4 (5-Gallons)

    Schaeffer's 723 SynShield Synthetic Ultra Performance 5W-30 | 5-G

    Schaeffer Mfg Co.

    $278.65
    Save 10% when you buy 3! Schaeffer's 723 SynShield Ultra Performance Full Synthetic SAE 5W-30 CK-4 (5-Gallons) is a premium, advanced performance, heavy-duty diesel engine oil. It is formulated to provide maximum protection...
    $278.65
    Qty in Cart: 0
    Quantity:
    Price:
    $278.65
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  • Schaeffer 0722-012 SynShield Ultra Performance 10W-30 CK-4 (12-quarts)

    Schaeffer's 722-012 SynShield Ultra Performance 10W-30 | 12-QTS

    Schaeffer Mfg Co.

    $169.79
    Schaeffer's 722 SynShield® Ultra Performance Diesel Engine Oil SAE 10W-30 CK-4 (12-Quarts) is a premium, advanced performance, synthetic plus, heavy-duty engine oil. It is formulated to provide maximum protection against...
    $169.79
    Qty in Cart: 0
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    Price:
    $169.79
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  • Schaeffer 6000-005 SynShield® Max MPG Diesel Engine Oil 10W-30 FA-4 (5-Gallons)

    Schaeffer 6000-005 SynShield® Max MPG 10W-30 FA-4 (5-Gallons)

    Schaeffer Mfg Co.

    $278.99
    Save 10% when you buy 3! Schaeffer's 6000 SynShield® Max MPG Diesel Engine Oil SAE 10W-30 FA-4 (5-Gallons) is a premium, advanced performance, synthetic plus, heavy-duty diesel engine oil. It is specially formulated to provide maximum...
    $278.99
    Qty in Cart: 0
    Quantity:
    Price:
    $278.99
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  • Schaeffer 0722-005 SynShield Ultra Performance 10W-30 CK-4 (5-Gallons)

    Schaeffer's 722-005 SynShield Ultra Performance 10W-30 | 5-G

    Schaeffer Mfg Co.

    $238.99
    Save 10% when you buy 4! Schaeffer's 722 SynShield® Ultra Performance Diesel Engine Oil SAE 10W-30 CK-4 (5-Gallons) is a premium, advanced performance, synthetic plus, heavy-duty engine oil. It is formulated to provide...
    $238.99
    Qty in Cart: 0
    Quantity:
    Price:
    $238.99
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  • Schaeffer 0700CK4-005 SynShield Durability Advantage Diesel Engine Oil 15W-40 (5-Gallons)

    Schaeffer 700CK4-005 SynShield Durability Advantage 15W-40 | 5-G

    Schaeffer Mfg Co.

    $238.99
    Save 10% when you buy 4! Schaeffer's 700 SynShield® Durability Advantage Diesel Engine Oil 15W-40 (5-Gallons) provides excellent equipment durability and longevity even during harsh, extreme duty operating conditions. It is a premium...
    $238.99
    Qty in Cart: 0
    Quantity:
    Price:
    $238.99
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  • On Sale
    Schaeffer 0700CK4-006 SynShield Durability Advantage Diesel Engine Oil 15W-40 (6-Gallons)

    Schaeffer 700CK4-006 SynShield Durability Advantage 15W-40 | 6-GC

    Schaeffer Mfg Co.

    Now: $266.99
    Was: $279.99
    Save 10% when you buy 3! Schaeffer's 700 SynShield® Durability Advantage Diesel Engine Oil 15W-40 (6-Gallons) provides excellent equipment durability and longevity even during harsh, extreme duty operating conditions. It is a premium...
    Now: $266.99
    Was: $279.99
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $266.99
    Was: $279.99
    Subtotal:
  • On Sale
    Schaeffer 0722-006 SynShield Ultra Performance 10W-30 CK-4 (6-Gallons)

    Schaeffer's 722-006 SynShield Ultra Performance 10W-30 | 6-GC

    Schaeffer Mfg Co.

    Now: $267.99
    Was: $299.68
    Save 8% when you buy 3! Schaeffer's 722 SynShield® Ultra Performance Diesel Engine Oil SAE 10W-30 CK-4 (6-Gallons) is a premium, advanced performance, synthetic plus, heavy-duty engine oil. It is formulated to provide...
    Now: $267.99
    Was: $299.68
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $267.99
    Was: $299.68
    Subtotal:
  • On Sale
    Schaeffer 9012-006 SynShield OTR Plus Full Synthetic 10W-30 CK-4 (6-Gallons)

    Schaeffer's 9012-006 SynShield OTR Plus Synthetic 10W-30 | 6-GC

    Schaeffer Mfg Co.

    Now: $298.99
    Was: $322.76
    Save 10% when you buy 3! Schaeffer's 9012 SynShield OTR Plus Full Synthetic SAE 10W-30 CK-4 (6-Gallons) is a full synthetic, premium quality, heavy-duty diesel engine oil. It is specially formulated to extend engine life. It...
    Now: $298.99
    Was: $322.76
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $298.99
    Was: $322.76
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  • Schaeffer 9012-005 SynShield OTR Plus Full Synthetic 10W-30 CK-4 (5-Gallons)

    Schaeffer's 9012-005 SynShield OTR Plus Synthetic 10W-30 | 5-G

    Schaeffer Mfg Co.

    $278.99
    Save 10% when you buy 3! Schaeffer's 9012 SynShield OTR Plus Full Synthetic SAE 10W-30 CK-4 (5-Gallons) is a full synthetic, premium quality, heavy-duty diesel engine oil. It is specially formulated to extend engine life. It...
    $278.99
    Qty in Cart: 0
    Quantity:
    Price:
    $278.99
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  • Schaeffer 8012-005 Advanced European Performance Heavy-Duty Diesel 5W-30 (5-Gallons)

    Schaeffer's 8012 European Performance HD Diesel 5W-30 | 5-G

    Schaeffer Mfg Co.

    $329.75
    Save 10% when you buy 3! Schaeffer's 8012 Advanced European Performance Heavy-Duty Diesel Engine Oil SAE 5W-30 (5-Gallons) offers long-term engine protection for European diesel vehicles. This oil is designed to meet the specific...
    $329.75
    Qty in Cart: 0
    Quantity:
    Price:
    $329.75
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  • Schaeffer 0711-006 SynShield® OTR Plus Engine Oil 10W-30 (6-Gallons)

    Schaeffer 711CK4-006 SynShield OTR Plus 10W-30 (6-Gallons)

    Schaeffer Mfg Co.

    $268.75
    Save 10% when you buy 3! Schaeffer’s 711 SynShield® OTR Plus Diesel Engine Oil CK-4 SAE 10W-30 (6-Gallons) is a premium, advanced performance, synthetic plus, heavy-duty oil. It is formulated to provide maximum protection against...
    $268.75
    Qty in Cart: 0
    Quantity:
    Price:
    $268.75
    Subtotal:
  • Schaeffer's Eco 5000™ SAE 15W-40 engine oil.  5 gallons

    Schaeffer 500 ECO 5000 Diesel 15W-40 CJ-4 | 5-G

    Schaeffer Mfg Co.

    $269.25
    Save 10% when you buy 4! Schaeffer's 500 Eco 5000™ Diesel Engine Oil 15W-40 CJ-4 (5-Gallons) is a premium quality, parasynthetic, heavy-duty diesel engine oil. It is formulated with highly re-refined Group II base oils. Eco...
    $269.25
    Qty in Cart: 0
    Quantity:
    Price:
    $269.25
    Subtotal:
  • On Sale
    Schaeffer's 070230-005 Supreme 7000 Synthetic Plus Engine Oil SAE 30 (5-Gallons)

    Schaeffer's 702 Supreme 7000 Synthetic Plus SAE 30 | 5-G

    Schaeffer Mfg Co.

    Now: $228.34
    Was: $256.58
    Save 10% when you buy 4! Schaeffer's 702 Supreme 7000™ Synthetic Plus Engine Oil SAE 30 (5-Gallons) is blended from a combination of polyalphaolefin (PAO) synthetic based fluids and hydro-converted Group II Plus oils. Schaeffer...
    Now: $228.34
    Was: $256.58
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $228.34
    Was: $256.58
    Subtotal:
  • Schaeffer 0711-005 SynShield® OTR Plus Engine Oil 10W-30 (5-Gallons)

    Schaeffer 711CK4-005 SynShield OTR Plus 10W-30 (5-Gallons)

    Schaeffer Mfg Co.

    $239.82
    Save 10% when you buy 4! Schaeffer’s 711 SynShield® OTR Plus Diesel Engine Oil CK-4 SAE 10W-30 (5-Gallons) is a premium, advanced performance, synthetic plus, heavy-duty oil. It is formulated to provide maximum protection against...
    $239.82
    Qty in Cart: 0
    Quantity:
    Price:
    $239.82
    Subtotal:
  • Schaeffer 0700CK4-012 SynShield Durability Advantage Diesel Engine Oil 15W-40 (12-Quarts)

    Schaeffer 700-012 SynShield Durability Advantage 15W-40 | 12-QTS

    Schaeffer Mfg Co.

    $167.99
    Schaeffer's 700 SynShield® Durability Advantage Diesel Engine Oil 15W-40 (12-Quarts) provides excellent equipment durability and longevity even during harsh, extreme duty operating conditions. It is a premium advanced performance,...
    $167.99
    Qty in Cart: 0
    Quantity:
    Price:
    $167.99
    Subtotal:
  • Schaeffer 0711-012 SynShield® OTR Plus Engine Oil 10W-30 (12-Quarts)

    Schaeffer 711CK4-012 SynShield OTR Plus 10W-30 (12-Quarts)

    Schaeffer Mfg Co.

    $169.88
    Schaeffer’s 711 SynShield® OTR Plus Diesel Engine Oil CK-4 SAE 10W-30 (12-Quarts) is a premium, advanced performance, synthetic plus, heavy-duty oil. It is formulated to provide maximum protection against wear, oxidation, deposit...
    $169.88
    Qty in Cart: 0
    Quantity:
    Price:
    $169.88
    Subtotal:
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