Toro 20340
Fuel treatment for the Toro 20340
Short answer
130-2393 on every run, on its own card each time. The 12 oz bottle arrives at 404330000 — and has never been listed without the ready-mixed can.
Verified options
What we have verified
| Part | Serial range | Status |
|---|---|---|
| 130-2393Premium Fuel Treatment (0.5 oz.) | 316000001–316999999 | Confirmed fit |
| 130-2393Premium Fuel Treatment (0.5 oz.) | 400000000–401499999 | Confirmed fit |
| 130-2393Premium Fuel Treatment (0.5 oz.) | 401500000–404329999 | Confirmed fit |
| 130-2393Premium Fuel Treatment (0.5 oz.) | 404330000–405699999 | Confirmed fit |
| 130-2393Premium Fuel Treatment (0.5 oz.) | 405700000–999999999 | Confirmed fit |
| 131-6572Premium Fuel Treatment (12 oz.) | 404330000–405699999 | Confirmed fit |
| 131-6572Premium Fuel Treatment (12 oz.) | 405700000–999999999 | Confirmed fit |
| 131-6572Premium Fuel Treatment (12 oz.) | 316000001–316999999 | Not verified |
| 131-6572Premium Fuel Treatment (12 oz.) | 400000000–401499999 | Not verified |
| 131-6572Premium Fuel Treatment (12 oz.) | 401500000–404329999 | Not verified |
What decides it
The numbers that matter here
- Which number
130-2393 on every run; 131-6572 from 404330000 upward
The packet is named throughout and always on a card of its own. The bottle is named on the runs from 404330000 and on none below, which is a fact about those pages rather than about the mower.
- The packet is always buyable on its own here
Unlike on the 20334 and the 20339
On both of those machines there are runs where Toro names 130-2393 only inside a maintenance kit's description, where it is not something you can buy separately. On this one there are none.
- If your serial is below 404330000
Your listing names six accessories and no 12 oz bottle
Six is a smaller selection, not a blank page — the packet is one of the six. The bottle's absence there is Toro publishing less, not a machine that cannot use one.
- 131-3823 is not a second treatment
It is ready-mixed fuel, and it has never been listed without 131-6572
The two arrive together on this machine and travel together on every other one here. That is what makes the can look like a companion size, and it is a fact about Toro's pages rather than about what is in the can.
In detail
Choosing fuel treatment for this mower
Toro names 130-2393, the 0.5 oz packet, on every run it publishes for the 20340, and on every one of them it has a card of its own. That is worth saying plainly, because the two machines closest to this one on this site do not manage it. On the 20334 the packet is missing from four runs and is inside a kit on three more; on the 20339 the oldest run has it inside the kit as well. **The 20340 is the machine where you could always buy it by itself.**
131-6572, the 12 oz bottle, arrives at 404330000 and stays. This site does not record that as a boundary. Seven other numbers arrive on the same run and nothing leaves — three engine oils, a front wheel, a mesh bag, a grass bag and a second cover. Unrelated things do not change on a mower in step, so the runs below are recorded as unknown for the bottle rather than as machines that could not take one.
**The bottle does not arrive alone, and that is what this page is for.** 131-3823 arrives on the same run. It is not a fuel treatment: it is All Season 4-Cycle Fuel, a can of ready-mixed fuel rather than something added to fuel, which is what its own product page settles.
But across every machine this site holds, on every listing that names accessories at all, **these two numbers have never once been apart.** Where one is named the other is named; where one is absent so is the other. Not a single listing carries one without the other.
That is exactly why the can reads as a bigger bottle of the same thing. It has never been seen standing on its own. It is also why this site does not file it as a fuel treatment: **what a catalogue lists beside a thing is not what the thing is**, and a number that always travels with another is evidence about the page, not about the product.
One comparison for anyone with two of these mowers. The 20334 and the 20339 both gain the 12 oz bottle at 400000000. This machine gains it at 404330000. Same pair of numbers, same catalogue, three machines, two serials — so there was no day on which Toro added the bottle to everything, and a serial read off a sibling is worth nothing here.
Toro publishes no dosage on any of these listings; the packet's own description points the reader at the product label instead. A 0.5 oz packet and a 12 oz bottle are not one product offered in two sizes, and nothing on the listing says how the second is meant to be measured.
The mistake we see most
Method
How we established this
We opened all five listings Toro publishes for model 20340 and recorded which fuel treatments each names. The runs either side of 404330000 were re-opened on 31 August 2026 and their full accessory lists compared, so the seven numbers arriving alongside the bottle were counted rather than assumed. That 131-6572 and 131-3823 never appear apart is a count across every listing this site has read, on all eleven machines it holds, not an impression from this one.
Same machine
Other parts we have verified for the Toro 20340
Other machines
Fuel treatment 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 31, 2026.
- 1
Parts — 22in Recycler Lawn Mower with SmartStow, model 20340, serial range 316000001–316999999
The Toro Company · Primary source · Accessed August 16, 2026
Toro’s official parts listing for this model and serial range. Lists 59534P (22 Inch Recycler Blade) and 20234 (Engine Maintenance Kit for Briggs & Stratton Engine).
- 2
Parts — 22in Recycler Lawn Mower with SmartStow, model 20340, serial range 400000000–401499999
The Toro Company · Primary source · Accessed August 16, 2026
Toro’s official parts listing for the later serial range of the same model number. Lists 59534P and 130-8148 (Briggs & Stratton EXi Engine Maintenance Kit Replacement) — note the maintenance kit differs from the earlier range.
- 3
Parts — 22in Recycler Lawn Mower with SmartStow, model 20340, serial range 401500000–404329999
The Toro Company · Primary source · Accessed August 20, 2026
Toro’s official parts listing for this model and serial range, reached from the serial-range selector on the model’s other listings. Within the part categories this site records, its accessory list names 59534P, 130-8148, and does not name 20234, 137-4833P, 490-2012. The page carries further accessories this site holds no record for, among them engine oils, bags and fuel products other than 130-2393.
- 4
Parts — 22in Recycler Lawn Mower with SmartStow, model 20340, serial range 404330000–405699999
The Toro Company · Primary source · Accessed August 20, 2026
Toro’s official parts listing for this model and serial range, reached from the serial-range selector on the model’s other listings. Within the part categories this site records, its accessory list names 59534P, 130-8148, 137-4833P, 490-2012, and does not name 20234. The page carries further accessories this site holds no record for, among them engine oils, bags and fuel products other than 130-2393.
- 5
Parts — 22in Recycler Lawn Mower with SmartStow, model 20340, serial range 405700000–999999999
The Toro Company · Primary source · Accessed August 20, 2026
Toro’s official parts listing for this model and serial range, reached from the serial-range selector on the model’s other listings. Within the part categories this site records, its accessory list names 59534P, 130-8148, 137-4833P, 490-2012, and does not name 20234. The page carries further accessories this site holds no record for, among them engine oils, bags and fuel products other than 130-2393.
- 6
All Season 4-Cycle Fuel for Lawn Mowers and Snow Blowers 32 oz (Part # 131-3823)
The Toro Company · Primary source · Accessed August 31, 2026
The number requested, no redirect and no “Replaces Product” line. Internal designation 4-CYCLE FUEL, SNOW AND LAWN, 32OZ CAN. Toro describes it as “ethanol-free fuel formulated specifically for outdoor power equipment engines” with “no mixing required — pours straight in”. That settles what it is: fuel itself, not something added to fuel, which is why it is not filed beside the Premium Fuel Treatments in pt_fuel_additives. Recorded as a source with no part and no fitments while the category question is with the owner — the evidence is kept even though the record is not made.
- 7
Premium Fuel Treatment (12 oz.) (Part # 131-6572)
The Toro Company · Primary source · Accessed August 31, 2026
Toro’s own page for the number requested, with no redirect and no “Replaces Product” line in either direction. It describes what the treatment is for — protecting small 2-cycle and 4-cycle engines from ethanol-blended fuels — and names no machine, model or engine, so it establishes what the part is and nothing about what it fits. Every fitment for this number rests on the parts listings instead. **Re-read 31 August 2026 and unchanged.** Internal designation TORO PREMIUM FUEL TREATMENT 12 OZ BTL. It publishes no ratio: a bullet says to refer to the product label for the correct dosage for your fuel tank size, which is a pointer rather than a quantity.