John Deere Plus-50 II shows up in maintenance kits for compact utility tractors like the 1025R and 3320. It fits dozens of tractor models ranging from the 770 through the 4710. You’ll also find it specified for the X700 Signature Series lawn and garden tractors, including the X728, X729, and X749.
John Deere Plus-50 II carries API CK-4/SN and CJ-4 ratings, which means it works in both diesel and gasoline engines. It also meets John Deere’s proprietary JDQ-78X high-temperature engine test standard. On the global certification side, you’re looking at ACEA E9 and E7, JASO DH-2, Cummins CES20081, Mack EO-O Premium Plus 07, and Volvo VDS-4.
John Deere Plus-50 II Alternatives
While John Deere Plus-50 II is a top-tier choice for heavy-duty engines, many equipment owners look for high-quality alternatives that offer the same API CK-4 protection at a more competitive price point. Let’s dive in:
Shell Rotella T5 15W-40
Shell Rotella T5 Synthetic Blend 15W-40
Shell Rotella T5 uses synthetic base oil blended with conventional oil, which improves cold-start flow compared to straight 15W-40 conventional oil. Viscosity sits at 111.2 cSt at 40°C and 14.9 cSt at 100°C, with a viscosity index of 138. Pour point is -37°C. Dynamic viscosity at -20°C measures 6,200 mPa·s, indicating strong cold-weather performance.
Total Base Number is 10 mgKOH/g. Sulphated ash is 1.0 percent, which supports diesel particulate filter longevity in emissions-equipped engines. Flash point comes in at 251°C.
The advanced low-ash formulation helps prevent blocking of exhaust after-treatment devices. Shell claims the synthetic blend improves engine cleanliness and protects against piston deposits at extended drain intervals, though actual intervals depend on operating conditions.
Other Compatibility:
- Caterpillar ECF-3, ECF-2
- Cummins CES 20086, 20081
- Detroit Fluid Specification 93K222, 93K218
- Volvo VDS-4.5, VDS-4
- Ford WSS-M2C171-F1
- Mack EOS-4.5, EO-O Premium Plus
Doc’s Diesel 15W-40
Doc’s Diesel 15W-40 SEMI Synthetic Heavy Duty
Doc’s Diesel 15W-40 is marketed as a full synthetic heavy-duty diesel engine oil that works as an aftermarket equivalent to John Deere Plus-50 II.
The oil uses Group III base oils with a CK-4 additive package. Doc’s Diesel claims it meets or exceeds OEM standards and maintains warranties when used according to manufacturer guidelines, though no specific approvals from Cummins, Caterpillar, Mack, or Volvo are listed publicly.
Chevron Delo 400 XLE SB 15W-40
Delo 400 XLE Heavy Duty Synblend
Chevron Delo 400 XLE SB 15W-40 is a synthetic blend heavy-duty diesel engine oil that works as an aftermarket equivalent to John Deere Plus-50 II. It meets API CK-4, CJ-4, and CI-4 PLUS specifications for modern low-emission diesel engines and works in older engines requiring CH-4.
The oil uses ISOSYN Advanced Technology, which is Chevron’s term for their synthetic blend formulation. It’s designed for 2017 GHG-compliant diesel engines, 2010 low-emission engines, and off-highway Tier IV diesels with SCR, DPF, and EGR systems. It also carries Allison TES-439 approval for heavy-duty transmissions.
Chevron claims improved low-temperature pumpability compared to conventional 15W-40 oils and extended drain performance, though actual intervals depend on operating conditions and OEM recommendations. The oil provides deposit control and supports emission control system longevity through its formulation.
The heavy-duty protection offered by Delo is similar to the high-performance additives found in the oil for 6.7 Cummins engines, which also prioritize soot handling and deposit control.
Approvals and Compatibility:
- Cummins CES 20086
- Detroit Fluids Specification 93K222
- Mack EOS-4.5
- Renault RLD-3
- Volvo VDS-4.5
- ACEA E11
- Caterpillar ECF-3
- DEUTZ DQC III-18 LA
- Ford WSS-M2C171-F1
- JASO DH-2
- MAN M3775
- MTU Category 2.1
Schaeffer 700 SynShield Durability Advantage 15W-40
Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability
Schaeffer 700 SynShield Durability Advantage 15W-40 is a synthetic plus heavy-duty diesel engine oil that works as an aftermarket equivalent to John Deere Plus-50 II. It meets API CK-4, CJ-4, CI-4, and CI-4 Plus specifications for modern emission-compliant engines and older diesels.
The oil uses a synthetic blend formulation with two friction modifiers: Micron Moly and Schaeffer’s proprietary Penetro additive. Viscosity sits at 111.7 cSt at 40°C and 15.51 cSt at 100°C, with a viscosity index of 147. Pour point is -38°F (-39°C). Cold Cranking Simulator viscosity at -20°C measures 3,740 cP, indicating strong cold-start performance.
Total Base Number is 10.2. Sulfated ash content is under 1 percent, supporting diesel particulate filter longevity. Flash point comes in at 469°F (243°C). NOACK volatility of 8.1 percent indicates controlled oil consumption.
Schaeffer claims this oil provides superior soot-handling (77 percent better than conventional CJ-4 oils) and wear protection (85 percent less wear than conventional CJ-4 oils).
Approvals and Compatibility:
- Caterpillar ECF-3
- Cummins CES 20081, 20086
- Detroit Diesel DDC93K218, DDC93K222
- Mack EO-O Premium Plus, EOS-4.5
- Volvo VDS-4, VDS-4.5
- Ford WSS-M2C171-E, F1
- John Deere, Case-New Holland (CHN)
- ACEA E7-22, E11-22
- JASO DH-2
Viscosity Unitek 3000K Semi-Synthetic 10W-40
VISCOSITY UNITEK 3000K Diesel Engine Oil SS 10W-40
Viscosity Unitek 3000K Semi-Synthetic 10W-40 is a direct equivalent to John Deere Plus-50 II 10W-40 according to Viscosity Oil Company’s cross-reference guides. The manufacturer blends oil for major agricultural brands and lists this as a compatible alternative.
The oil uses highly refined base oils with high shear stability viscosity modifiers. Viscosity sits at 15.5 cSt at 100°C with a viscosity index of 150. Pour point is -47°C, providing excellent cold-weather flow. Cold Cranking Simulator viscosity at -25°C measures 6,000 cP.
Total Base Number is 10 mgKOH/g. Sulfated ash content is 1.0 percent, supporting diesel particulate filter longevity in emissions-equipped engines. Flash point comes in at 220°C.
The oil meets API CK-4, CJ-4, CI-4, and CH-4 specifications for modern low-emission diesel engines and older applications. It’s formulated for equipment with SCR, DPF, and EGR systems. The semi-synthetic formulation provides soot dispersion and deposit control under severe-duty operation.
Note that this is 10W-40, not 15W-40. While both are “40 weight” oils at operating temperature, the 10W provides better cold-start flow than 15W-40. Always verify your equipment’s viscosity requirements before switching grades.
Approvals and Compatibility:
- API CK-4, CJ-4, CI-4, CH-4
- ACEA E9-12/E7
- Mack EOS-4.5, EO-O Premium Plus
- Volvo VDS-4.5/4/3
- Detroit Diesel 93K222, 93K218
- Cummins CES 20086/20081
- Caterpillar ECF-3, ECF-2
- Ford WSS-M2C171-F1
John Deere Plus-50 II Specifications
The OEM John Deere Plus-50 II
John Deere Plus-50 II measures 128 cSt at 40°C and 15.6 cSt at 100°C. The viscosity index is 127, which means it stays relatively stable as temperatures change. At 150°C under high shear conditions, it maintains 4.3 cP.
It flows down to -36°C and has a flash point of 225°C. The Total Base Number is 10.5 mg KOH/g. Sulfated ash sits at 1.0 mass percent, which helps protect diesel particulate filters. Each gallon weighs 8.22 lbs.
The 15W-40 viscosity means it flows well when cold (the “15W” part) but stays thick enough to protect at operating temperature (the “40” part). This works for equipment running in different weather conditions.
The TBN of 10.5 tells you how much acid the oil can neutralize before it breaks down. Diesel combustion creates acidic byproducts, so higher TBN means the oil lasts longer. The 1.0 percent sulfated ash matters for newer engines with diesel particulate filters. Too much ash clogs the filter.
John Deere says you can run 500-hour drain intervals when using this oil with John Deere filters in John Deere engines. Real-world intervals depend on how hard you work the equipment, how dusty your conditions are, and fuel quality.
This oil works in John Deere iT4 (Interim Tier 4) engines and any diesel engine requiring API CJ-4 or CK-4 oil. It also works in older diesels that originally called for Plus-50 oil.
You’ll find it in tractors from the 770 through 4710 range, compact models like the 3320, and X700 lawn tractors (X728, X729, X749). Owners of vintage equipment like the 1954 Model 40-C use it for engine lubrication.
For diesel engines, it meets API CK-4, SN, CJ-4, CI-4 PLUS, CI-4, CH-4, and CG-4. For gasoline engines, it covers API SM, SL, and SJ. It meets John Deere’s JDQ-78X high-temperature engine test.
International certifications include ACEA E9 and E7, JASO DH-2, and Global DHD-1. It’s approved by Cummins (CES20081), Mack (EO-O Premium Plus 07), Volvo (VDS-4), Mercedes-Benz (228.31), and Detroit Diesel (93K218).
Understanding JDQ-78X, Plus-50 II, and TY26673
Let’s sort out the confusion between JDQ-78X, Plus-50 II, and TY26673.
JDQ-78X is a quality standard, Plus-50 II is a product formulation, and TY26673 is a specific commercial part number.
TY26673 is the John Deere part number for a one-gallon (3.78 liter) container of engine oil. It identifies the product for ordering and inventory purposes, specifically indicating the 15W-40 viscosity grade within the Plus-50 II lineup.
Plus-50 II is the brand name and proprietary formulation of the oil itself. John Deere developed this premium engine oil specifically for modern Tier 4 (iT4) low-emission engines.
The formulation is engineered to provide protection against wear, oxidation, and deposits under severe operating conditions. When used with John Deere filters in John Deere engines, this oil allows for extended drain intervals up to 500 hours.
JDQ-78X is John Deere’s proprietary high-temperature engine test standard. To meet this standard, oil undergoes extreme testing, such as running an engine for 500 hours non-stop at full load and high heat.
While Plus-50 II meets standard industry ratings like API CK-4/SN, the JDQ-78X standard is a more rigorous internal benchmark that Plus-50 II was specifically designed to pass.
Having the right engine oil is just one part of the job. You also need a high-quality John Deere Hy-Gard equivalent to keep your tractor’s hydraulic clutches and wet brakes working smoothly.
Closing Notes
Agricultural engines face unique heat stress during shutdown. After heavy loads like tillage or baling, the engine shuts down but temperatures spike in the cylinder head and upper engine area. This is the soak period. While standard API CK-4 oils protect during operation, JDQ-78X oils are formulated to prevent oil from baking into carbon deposits during these stagnant heat cycles.
Standard oils can oxidize and form varnish when exposed to extreme heat without circulation. Over time, this scaling builds up on rings, valve stems, and oil galleries. You lose compression, horsepower drops, and oil consumption increases.
Whether you choose genuine John Deere Plus-50 II or a high-spec alternative like Viscosity Unitek 3000K, Schaeffer SynShield, or Shell Rotella T5, you’re buying protection against long-term internal deposits.
This is critical in equipment that sees extended operation under load followed by sudden shutdowns, which is common in farming and construction.
If you plan to change your tractor’s engine oil soon, consider getting this oil filter from John Deere. It gives you a fresh filter and saves you from the work of pre-filling it:
John Deere Easy Change™ 30-Second Oil Change System
