Toro 21485
Engine oil for the Toro 21485
Short answer
The same three oil numbers on every 21485 listing that names accessories. One listing in the middle names none at all — and the runs either side of it agree.
Verified options
What we have verified
What decides it
The numbers that matter here
- Serial range
Does not affect the oil on this machine
Four other machines on this site move their synthetic at a serial. The 21485 does not move any of its three oil numbers, anywhere.
- If your serial is 420000000–420631775
Toro’s listing for you names no accessories at all
You are not missing anything and neither is your machine. The runs below and above name the same three oils as each other, so the answer is on those pages.
- Grade
SAE 30 (38903, 38916) or full synthetic 10W-30 (138-6053)
Both grades sit side by side with no guidance on choosing between them. SAE 30 is a mono-grade for warm running, 10W-30 a multi-grade; the engine manual and your climate decide.
- Bottle size
32 oz (38903) or 18 oz (38916), same grade
A quantity decision rather than a fitment one. With no published sump capacity, neither bottle is “an oil change” until you have checked the manual.
In detail
Choosing engine oil for this mower
The 21485 lists three oil numbers and never changes them: 38903, SAE 30 in a 32 oz bottle; 38916, the same grade in 18 oz; and 138-6053, the full synthetic 10W-30. The older synthetic 117-0066 is named on none of this machine’s listings. No oil number on the 21485 depends on your serial.
The reason this page is worth reading is the listing that names nothing. Of the five listings Toro publishes for this model, the run 420000000–420631775 publishes no accessory list at all — not a short one, not one that omits oil, none. That is 631,776 serial numbers wide, and it is **not** the newest run. Toro lists accessories below it and above it, and both of those runs name the same three oils.
That matters because an empty listing at the end of a machine’s life can be read as “Toro has not filled this in yet”. An empty one in the middle cannot. And the agreement either side of it is exact rather than approximate: **the run below the gap and the run above it name the same thirteen numbers**, oils among them, with nothing entering or leaving across it. For an owner whose serial falls inside the window the answer is not missing — it is on both pages, and they do not differ.
What does change on this machine is the discharge chute, once, at 418396425. That has its own page under this model’s serial ranges and nothing about it touches the oil.
Toro publishes no sump capacity here, so how much the engine holds is an engine-manual question.
The mistake we see most
Method
How we established this
We opened all five listings Toro publishes for model 21485 and recorded which oil numbers each names, then opened the product pages for the three it names. The empty run was opened like the rest and is kept as a source with no fitment rows scoped to it, which is why it appears here as a gap rather than as an absence of oil.
Same machine
Other parts we have verified for the Toro 21485
Other machines
Engine oil on the other mowers we cover
The answer is not the same on every machine, which is the point of checking rather than assuming.
Provenance
Sources
Last verified against these sources on August 29, 2026.
- 1
Parts — 22in Recycler Max, model 21485, serial range 400000000–415399999
The Toro Company · Primary source · Accessed August 22, 2026
Lists chute 139-6556, blade 59534P and engine maintenance kit 130-8148, with thirteen items in all. This is one of the two ranges carrying the older chute.
- 2
Parts — 22in Recycler Max, model 21485, serial range 415400000–418396424
The Toro Company · Primary source · Accessed August 22, 2026
Lists chute 139-6556, blade 59534P and engine maintenance kit 130-8148, with thirteen items in all. This is one of the two ranges carrying the older chute.
- 3
Parts — 22in Recycler Max, model 21485, serial range 418396425–419999999
The Toro Company · Primary source · Accessed August 22, 2026
Lists chute 147-8696, blade 59534P and engine maintenance kit 130-8148, with thirteen items in all. This is one of the two ranges carrying the replacing chute.
- 4
Parts — 22in Recycler Max, model 21485, serial range 420631776–999999999
The Toro Company · Primary source · Accessed August 22, 2026
Lists chute 147-8696, blade 59534P and engine maintenance kit 130-8148, with thirteen items in all. This is one of the two ranges carrying the replacing chute.
- 5
Parts — 22in Recycler Max, model 21485, serial range 420000000–420631775
The Toro Company · Primary source · Accessed August 22, 2026
This listing carries no accessory list at all. What it does carry is seven of Toro’s assembly drawings — Deck Decal, Engine and Blade, Front Wheel and Height-of-Cut, Handle, Housing, Rear Bag, and Rear Wheel and Height-of-Cut — and the usual Parts & Manuals section. Recorded as a source so the range is accounted for, and scoped to no fitments: a page that lists nothing is not a page that lists an absence.
- 6
SAE 30 4-Cycle Lawn Mower Engine Oil 32 oz (Part # 38903)
The Toro Company · Primary source · Accessed August 29, 2026
The number requested, answered without a redirect and with no “Replaces Product” line in either direction. Toro describes it as a mono-grade fluid for high-temperature use and states it “meets or exceeds performance requirements of all OEM products (Toro®, Briggs & Stratton®, Kohler®, Honda® and Tecumseh®)”. It names engine makes and no machine, model or engine number, so it establishes the product and not the fitment.
- 7
SAE 30 4-Cycle Summer Engine Oil 18 oz. (Part # 38916)
The Toro Company · Primary source · Accessed August 29, 2026
The number requested, no redirect and no “Replaces Product” line. Same mono-grade SAE 30 description as 38903 and the same list of engine makes, in an 18 oz. bottle rather than 32 oz. The page is marked “Not Available Online”, which is a statement about Toro’s own checkout and not about whether the oil is listed for a machine. This is the bottle kit 20298 itemizes.
- 8
OIL-30/10W-30 SYNTHETIC CK4 [QT] (Part # 138-6053)
The Toro Company · Primary source · Accessed August 28, 2026
The same page served at its own number, and it is the same page carrying that one “Replaces Product 117-0066” line — so Toro states the supersession once and either number reaches it, which is not the same as stating it from both directions. This page is now also the source for part 138-6053 itself: batch 13 created the pt_engine_oil category, so the clause that used to sit here — that engine oil is in no category this site records — stopped being true the moment that batch was staged.