What Oil Does a Mitsubishi Take? Specs for Petrol, Diesel, and PHEV Engines

BySerge Barrett

Mitsubishi shifted from 5W-30 to 0W-20 on most petrol models after 2013, which means owners used to older specifications frequently put in the wrong grade on newer vehicles. The diesel Outlander additionally requires a low-SAPS oil to protect its DPF system, and the PHEV variant has its own requirements driven by the stop-start nature of its engine cycles. Since the correct grade depends on the engine code rather than just the model name, identifying which engine is fitted before an oil change is the most important first step.

Naturally Aspirated Petrol — 4B11, 4B12, 4J12

The 4B11 (2.0L), 4B12 (2.4L), and 4J12 (2.4L) engines cover the Outlander, ASX, and Eclipse Cross across most markets. These engines accept either of two grades depending on the production year:

  • 0W-20 full synthetic — required on all models from approximately 2013 onward. Mitsubishi specifies API SN or SP certification. The 4B11 in particular uses high-precision internal tolerances that benefit from the fast cold-start flow of 0W-20 — thicker oil causes additional wear on the crankshaft bearings during cold starts.
  • 5W-30 full synthetic — acceptable on pre-2013 variants and in markets where 0W-20 is not readily available. However, since Mitsubishi shifted the specification toward 0W-20 on newer engines, using 5W-30 in a post-2013 model results in slightly higher fuel consumption and reduces the cold-start protection the engine was designed around.

Capacity for the 4B11/4B12: approximately 4.2–4.5 litres with filter.

If Mitsubishi Genuine 0W-20 is unavailable, the owner’s manual permits 5W-20 displaying ILSAC certification as a temporary substitute — however, 0W-20 should be restored at the next service.

Diesel Engine — 4N14

The 4N14 2.2L diesel engine in the Outlander ZJ and ZK (sold in Europe, Australia, and parts of Asia from 2012 to 2021) requires a low-SAPS oil to protect the diesel particulate filter. The correct specification is 5W-30 meeting ACEA C2 or C3. Do not use standard API CF or CI-4 diesel oils — these contain higher ash levels that accelerate DPF clogging and shorten the filter’s service life.

Capacity for the 4N14: approximately 5.5–6.0 litres with filter.

The Outlander diesel is no longer sold in most markets following Mitsubishi’s move away from diesel in the European range, however a large number of 4N14-equipped vehicles remain in service. Oil specification compliance is particularly important on these engines because DPF replacement is an expensive repair that premature ash loading accelerates significantly.

PHEV Variant — Outlander PHEV

The Outlander PHEV uses the same 2.4L 4B12 petrol engine as the standard Outlander, however its oil requirements are stricter in practice. The engine runs in short cycles — starting cold, running briefly, then shutting down while the electric motors handle propulsion — which means fuel contamination accumulates in the oil faster than mileage alone suggests.

The specified oil is 0W-20 API SN full synthetic. Additionally, the PHEV owner’s manual (European spec) also permits 0W-30, 5W-30, and 5W-40 meeting ACEA A3/B3, A3/B4, or A5/B5, acknowledging that in cold climates a slightly thicker oil provides better film strength during the cold starts that occur frequently in EV-dominant driving.

Since the engine accumulates oil contamination faster than a conventionally driven vehicle, independent Mitsubishi specialists recommend changing oil every 7,500–10,000 km on PHEV variants rather than extending to the 15,000 km interval that the vehicle’s service reminder may suggest for normal driving conditions.

Capacity: approximately 4.5 litres with filter.

Reading the Label

When purchasing oil for any Mitsubishi petrol model, the label must show:

  • API SP (current standard) or API SN — both are acceptable
  • Correct viscosity: 0W-20 for post-2013 petrol, 5W-30 for diesel (ACEA C2/C3 required)

For diesel models, the ACEA C2 or C3 designation must appear explicitly on the label — not just ACEA A3/B4, which is a petrol standard and does not confirm the low-SAPS requirement for DPF protection.

Change Intervals

Mitsubishi recommends oil changes every 7,500 miles or 6 months on conventional oil, and every 7,500 miles or 12 months on full synthetic for most petrol models. Furthermore, on PHEV variants, 7,500 km or 6 months is the safer interval regardless of what the service reminder shows, given the fuel contamination pattern of stop-start engine operation. For the diesel 4N14, 10,000 km or 12 months applies under normal driving conditions, reducing to 7,500 km under severe use.

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