Using the wrong oil grade or leaving it too long between changes is one of the fastest ways to shorten the life of a Kioti Daedong engine. This guide covers the correct oil specification, capacity, and change intervals for the most popular CK, DK, and CS series models.
Whether you own a compact CK2510 or a mid-range DK series tractor, getting the oil right is non-negotiable. Kioti’s Daedong engines are robust and long-lasting, but they rely on clean, correctly rated oil to maintain oil pressure, cool internal components, and protect against wear. Here’s everything you need to know, broken down by model.
What oil spec does a Kioti tractor need?
The oil specification required depends on your model year and whether your tractor is fitted with a DPF (Diesel Particulate Filter) exhaust system.
| Model / Year range | Emission tier | Required API spec | Viscosity |
|---|---|---|---|
| CK series 2015–2020 | Tier 2/3 – no DPF | API CH-4 or higher | SAE 10W-30, 10W-40, or 15W-40 |
| CK series 2021–present | Tier 4 – with DPF | API CJ-4 or higher | SAE 15W-40 (or 5W-40 in cold climates) |
| DK series (all years) | Tier 3/4 | API CI-4 or higher | SAE 15W-40 recommended |
| CS series (compact) | Tier 2/3 | API CH-4 or higher | SAE 10W-30 or 15W-40 |
⚠️ Important for DPF-equipped tractors (2021+): Do not use API CH-4 oil in a Tier 4 DPF engine. DPF systems require low-sulphated-ash oil (API CJ-4 or CK-4). Using the wrong grade can block the filter prematurely and result in costly repairs.
Oil capacity by model (with filter change)
Always measure oil capacity with a new filter installed, as the filter holds a small additional quantity of oil.
| Model | Engine | Capacity (litres) | Capacity (gallons) |
|---|---|---|---|
| CK2510 / CK2610 | 3-cyl Daedong 1.6L | 5.8 L | 1.53 gal |
| CK3510 / CK3520 | 3-cyl Daedong 1.8L | 5.8 L | 1.53 gal |
| CK4010 / CK4020 | 3-cyl Daedong 1.8L | 5.8 L | 1.53 gal |
| CS2510 / CS2520 | 3-cyl Daedong 1.1L | 3.0 L | 0.79 gal |
| DK35 / DK40 | 4-cyl Daedong | 7.0–7.5 L | ~1.9 gal |
| DK45 / DK50 / DK55 | 4-cyl Daedong | 7.5–8.0 L | ~2.0 gal |
| DK60 / DK65 | 4-cyl Daedong | 8.0–9.0 L | ~2.1–2.4 gal |
⚠️ Always verify with your engine serial number. Capacities can vary slightly between production years of the same model. When in doubt, fill to the lower dipstick mark, run the engine for 30 seconds, let it settle, then top up to the upper mark.
Oil change intervals by model
Kioti and Daedong service schedules follow a consistent pattern across most models, with one important exception — the first oil change on a new tractor.
| Service point | CK series | DK / CS series | Notes |
|---|---|---|---|
| First oil change (break-in) | 50 hours | 50 hours | Critical — metal particles from break-in must be removed |
| Regular interval | Every 100 hours | Every 100 hours | Change oil filter at every oil change |
| Maximum interval | 1 year | 1 year | Even if 100 hours has not been reached |
| Hydraulic filter | Every 200 hours | Every 200 hours | Hydraulic oil change at 400 hours |
Tractor owners who only use their machine seasonally (say 70–80 hours per year) should still change the oil annually regardless of hours, as oil degrades over time from moisture and combustion by-products even when the tractor sits idle.
Cold climate considerations
Standard 15W-40 oil can thicken in very cold temperatures, making cold starts harder and increasing wear on engine components. If you operate in temperatures regularly below -10°C (14°F), consider switching to a 5W-40 full synthetic oil that meets the same API spec for your model. This provides better flow at start-up while still protecting at operating temperature.
Signs your Kioti engine oil needs attention
Don’t rely solely on the hour meter. These are signs your oil may need changing ahead of schedule:
- The oil appears very dark or black on the dipstick.
- Oil that smells burnt or has a fuel odour.
- White or milky colouring, which may indicate coolant contamination.
- Excessive engine noise at start-up, suggesting oil pressure is slow to build.
If you notice any of these, change the oil and filter immediately and investigate the root cause before returning to work.
Keeping your oil filter in stock
The oil filter should be replaced at every engine oil change. It’s a low-cost part that plays a critical role in keeping the oil circuit clean. Kioti CK and DK series filters are model-specific, so it’s worth keeping a spare on the shelf. Always confirm the filter part number against your engine serial number before ordering, as filter specifications changed between production runs on some models.
If you’re unsure which oil filter fits your tractor, get in touch with our team with your engine serial number and we’ll confirm the correct part before dispatch.
