John Deere Plus-50 II Equivalent: Are They Any Good?

I’ve spent countless hours tinkering with my John Deere equipment, from tractors to mowers, and one thing’s clear: the right oil keeps these machines humming like a well-tuned guitar.

John Deere Plus-50 II is the gold standard for many of their engines and transmissions, but it’s not always the easiest on the wallet or the most convenient to source.

So, I set out to find equivalents—oils that match or come close to its performance without the branded price tag. Let me take you through my journey, breaking down what Plus-50 II is, why it matters, and the alternatives that can keep your equipment running smoothly.

Understanding John Deere Plus-50 II

First, let’s talk about what makes Plus-50 II special. It’s a premium, heavy-duty diesel engine oil designed specifically for John Deere’s rigorous standards.

It’s formulated to handle the high temperatures, heavy loads, and extended drain intervals common in modern diesel engines.

Plus-50 II meets API CK-4 and CJ-4 service categories, which means it’s built for low-emission engines with advanced exhaust after-treatment systems like diesel particulate filters (DPFs).

It’s also backward compatible with older engines, making it versatile for mixed fleets.

The viscosity grade is typically 15W-40, though a 0W-40 synthetic option exists for colder climates. That 15W-40 rating means it flows well at low temperatures (the “W” stands for winter) while maintaining viscosity at high operating temps.

It’s not just engine oil, though—John Deere also recommends it for certain hydraulic and transmission systems, which complicates finding a one-size-fits-all substitute.

Why care about equivalents?

Well, Plus-50 II can cost $20–$30 per gallon, and if you’re running a fleet or just want to save a buck, alternatives can be a lifesaver. But you can’t just grab any oil off the shelf. It needs to match viscosity, performance specs, and compatibility with your equipment.

Let’s explore some options I’ve tested and researched.

John Deere Plus-50 II Equivalent

After testing and researching, here’s a rundown of the seven John Deere Plus-50 II equivalents I’ve covered:

• Shell Rotella T6 Multi-Vehicle 5W-40: Full synthetic, great for cold weather, CK-4 rated, ~$22/gallon.
• Mobil Delvac 1300 Super 15W-40: Semi-synthetic, widely available, CK-4, ~$18/gallon.
• Valvoline Premium Blue One Solution 15W-40: Cummins-endorsed, clean performance, CK-4, ~$20/gallon.
• Chevron Delo 400 SDE 15W-40: ISOSYN tech, near-synthetic performance, CK-4, ~$19/gallon.
• Castrol Vecton 15W-40: System Pro Technology, soot control, CK-4, ~$21/gallon.
• Pennzoil Platinum Euro L 5W-30: Full synthetic, cold-weather champ, CK-4, ~$23/gallon.
• Lucas Oil Magnum CJ-4 15W-40: Budget-friendly, semi-synthetic, CK-4, ~$19/gallon.

Alternative 1: Shell Rotella T6 Multi-Vehicle 5W-40

I first stumbled across Shell Rotella T6 Multi-Vehicle 5W-40 at my local auto parts store, and it’s been a game-changer for my John Deere tractor.

This full-synthetic oil is marketed for both diesel and gasoline engines, but its CK-4 rating makes it a strong contender for Plus-50 II’s turf.

The 5W-40 viscosity is slightly thinner at startup than 15W-40, which I’ve found improves cold-weather cranking in my frosty Midwestern mornings. At operating temperatures, it holds up just as well under heavy loads.

What I love about Rotella T6 is its additive package. It’s got enhanced detergents to keep sludge at bay and anti-wear agents that protect my engine’s internals during long hours of plowing. It’s also approved for extended drain intervals, though I stick to John Deere’s recommended 500-hour intervals to be safe.

One downside?

It’s not explicitly labeled for hydraulic or transmission use, so I wouldn’t use it in those systems without checking my manual. Priced around $22 per gallon, it’s a solid value, and I’ve noticed no performance drop-off compared to Plus-50 II.

Alternative 2: Mobil Delvac 1300 Super 15W-40

Next up is Mobil Delvac 1300 Super 15W-40, a name that’s practically synonymous with diesel engine oil.

I tried this in my John Deere 4045 engine, and it performed like a champ.

Like Plus-50 II, it’s a CK-4 oil with a robust additive package for soot control, wear protection, and thermal stability.

The 15W-40 viscosity is a direct match, so there’s no guesswork about flow or pumpability.

What stood out to me was Delvac’s reputation for handling extreme conditions. I run my tractor hard—think long days of tilling or hauling—and this oil doesn’t break a sweat. It’s also widely available, often cheaper than Plus-50 II at about $18 per gallon.

My only gripe is that it’s a conventional oil with some synthetic blend components, not a full synthetic like Rotella T6 or Plus-50 II’s 0W-40 option. For hydraulic systems, I’d hesitate unless the manual explicitly allows it. Still, for engine use, it’s a reliable pick that’s kept my equipment purring.

Alternative 3: Valvoline Premium Blue One Solution 15W-40

Valvoline Premium Blue One Solution caught my eye because it’s endorsed by Cummins, another heavy-hitter in the diesel world.

This 15W-40 CK-4 oil is designed for mixed fleets, and I’ve used it in both my John Deere diesel and a gas-powered utility vehicle.

It’s formulated to protect against wear, oxidation, and deposits, which is critical for engines that see heavy-duty cycles.

I was impressed by how clean my engine stayed after 400 hours of use—no sludge or gunk buildup. Valvoline claims it’s optimized for emissions systems, which is a plus for newer John Deere models with DPFs. At around $20 per gallon, it’s competitively priced.

One quirk: it’s not as widely available as Rotella or Delvac, so I sometimes have to order online. Like the others, it’s primarily an engine oil, so I wouldn’t use it for transmissions without confirmation. For engine performance, though, it’s a strong Plus-50 II equivalent.

Alternative 4: Chevron Delo 400 SDE 15W-40

Chevron Delo 400 SDE 15W-40 is another option I’ve tested, and it’s a favorite among farmers in my area. This CK-4 oil matches Plus-50 II’s viscosity and performance specs, with excellent soot dispersancy and wear protection.

I used it in my John Deere 6R series tractor, and it handled summer heat and heavy loads without thinning out or losing pressure.

Delo’s ISOSYN technology blends conventional and synthetic base oils, giving it near-synthetic performance at a lower cost—about $19 per gallon. I also appreciate its compatibility with low-emission engines, which is crucial for my newer equipment.

The catch?

Like the others, it’s not a universal substitute for hydraulic or transmission fluid. For engine use, though, it’s a top-tier choice that’s kept my tractor running smoothly.

Alternative 5: Castrol Vecton 15W-40

I recently gave Castrol Vecton 15W-40 a spin in my John Deere 5E series tractor, and it’s earned a spot on my shortlist.

This CK-4 oil boasts “System Pro Technology,” which is fancy talk for controlling soot and keeping viscosity stable under heavy stress.

That’s exactly what I need for long days of mowing or hauling.

The 15W-40 viscosity is a perfect match for Plus-50 II, and I noticed smooth engine operation even during hot summer days.

At about $21 per gallon, it’s a bit pricier than some alternatives, but it’s easy to find at farm supply stores.

Castrol’s additive package keeps wear and deposits in check, and my engine’s been running quietly with no issues.

It’s not labeled for hydraulic or transmission systems, so I’d stick to using it in the engine. If you’re looking for a dependable, high-performing oil, Vecton’s a great choice.

Alternative 6: Pennzoil Platinum Euro L 5W-30

Pennzoil Platinum Euro L 5W-30 caught my attention for its full-synthetic formula and CK-4 rating, so I tested it in my John Deere 6M series during a chilly spring. The 5W-30 viscosity made startups noticeably smoother compared to 15W-40 oils, which is a big win for cold mornings.

It’s designed for modern diesel engines with emissions systems, making it ideal for newer John Deere models with DPFs.

Priced at around $23 per gallon, it’s a premium option, but I’ve noticed slightly better fuel economy and excellent cold-weather performance. Like most engine oils, it’s not meant for transmissions or hydraulics, so keep that in mind.

For engine protection, though, Pennzoil’s synthetic formula is tough to beat, especially if you deal with temperature swings.

Alternative 7: Lucas Oil Magnum CJ-4 15W-40

I discovered Lucas Oil Magnum CJ-4 15W-40 through a farming forum, and it’s a hidden gem for budget-conscious folks like me. This CK-4 oil is built for heavy-duty diesels, with a focus on wear protection and soot control.

I used it in my older John Deere 4020, and it held up beautifully during high-hour workloads. The 15W-40 viscosity matches Plus-50 II, and at $19 per gallon, it’s a steal.

It’s a semi-synthetic blend, not a full synthetic, but its additive package rivals pricier oils. I found it online easily, though it’s not always stocked locally. As with the others, it’s an engine oil, so don’t use it for transmissions without checking your manual.

For older equipment or tight budgets, Lucas Oil is a solid contender.

Hydrostatic Fluid Substitutes for John Deere Transmissions

Now, let’s tackle a trickier topic: substitutes for hydrostatic fluid in John Deere transmissions. Plus-50 II is sometimes recommended for these systems, but it’s not always the best fit.

John Deere’s Hy-Gard or Low-Viscosity Hy-Gard are the go-to fluids here, formulated for wet clutches, brakes, and hydraulic systems. If you’re looking for an alternative, I’ve had success with universal tractor fluids (UTFs) like Shell Spirax S4 TXM or Mobilfluid 424.

These UTFs meet John Deere’s J20C or J20D specs, depending on viscosity needs (J20C for standard temps, J20D for cold weather). I switched to Spirax S4 TXM for my 5M series tractor’s transmission, and it’s been smooth sailing—no clutch slippage or hydraulic lag.

Priced around $15–$20 per gallon, these are often cheaper than Hy-Gard. Just double-check your manual, as using the wrong fluid can lead to costly repairs.

Frequently Asked Questions (FAQ)

My Take On Choosing An Equivalent

Picking a Plus-50 II equivalent comes down to your equipment, operating conditions, and budget. For engines, Rotella T6, Delvac 1300, Valvoline Premium Blue, Delo 400, Castrol Vecton, Pennzoil Platinum, and Lucas Oil are all solid choices.

I lean toward Rotella T6 for its synthetic formula and cold-weather performance, but Delvac’s availability and Lucas Oil’s price make them close contenders. For transmissions, stick to a UTF like Spirax or Mobilfluid unless your manual explicitly allows engine oil.

One tip: always check your warranty. Using a non-John Deere fluid might raise eyebrows if you need service, though I’ve never had an issue with these reputable brands.

Also, monitor your equipment after switching—check for leaks, listen for odd noises, and inspect used oil for signs of trouble.