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S8-DPTSS8-DPTR

1.8 Skyactiv-D 116 (S8-DPTS, 2018-present) engine: faults and reliability

Mazda Skyactiv-D 1.5/1.8/2.2 (S5-DPTS, S8-DPTS, SH-VPTS) version

With caution

It is the most recent version and has the fewest accumulated kilometres on the road, so there are few reports of serious faults on fiches-auto.fr. Specialist sources describe the same design-related oil dilution risk as the rest of the family, so it is still worth watching the level.[1][2][3]

Years
since 2018
Power
116 hp
Faults that affect it
2
1 of high or critical severity
Cars that use it
3
in our database

7 sourcesHow we work

What changes in this version

Since 2018 the 1.8 Skyactiv-D has replaced the 1.5 in the CX-3 and the Mazda3, and it has also powered the CX-30 since its launch in 2019. It adds displacement over the 1.5 while keeping the same low-compression architecture and the same particulate filter regeneration design.[4][5][6]

Engine codes of this version: S8-DPTS, S8-DPTR.

Faults of the S8-DPTS engine

The documented engine faults that affect this version and its years, from most to least important.

  1. 1High severityFrequency: CommonLubricationOil dilution with diesel during DPF regenerationsOn the Skyactiv-D (1.5, 1.8 and 2.2), particulate filter regenerations can let diesel into the sump and raise the oil level. Mazda accepts some dilution as normal, but on short urban journeys the expected margin can be exceeded and harm the lubrication of the turbo and the camshaft.
  2. 2Medium severityFrequency: CommonIntakeCarbon build-up in the intake, EGR and injectorsUrban use and short journeys encourage carbon build-up in the intake manifold, EGR valve and injectors of the Skyactiv-D, with loss of power and uneven running; it is documented on the CX-5, the Mazda6, the Mazda3, the CX-3 and the CX-30.

Cars fitted with the S8-DPTS engine

Open each car to see all its faults with this engine and what to check before buying it.

Mazda

Frequently asked questions

Is the S8-DPTS engine reliable?

Our verdict is “With caution”. It is the most recent version and has the fewest accumulated kilometres on the road, so there are few reports of serious faults on fiches-auto.fr. Specialist sources describe the same design-related oil dilution risk as the rest of the family, so it is still worth watching the level.[1][2][3]

What faults does the S8-DPTS engine have?

The documented ones that affect this version, by importance: oil dilution with diesel during DPF regenerations (high severity) and carbon build-up in the intake, EGR and injectors (medium severity).

Which cars use the S8-DPTS engine?

Mazda 3 IV (since 2019), Mazda CX-3 (2016–2021) and Mazda CX-30 (since 2019).[1][2][3][5][6][7]

Are you buying a car with the S8-DPTS engine?

We will put you in touch with a partner only if you authorise it in the form.

Do you have a car with this engine? Tell us which faults you have had and at how many kilometres. Report your fault.

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. Fiabilité Mazda CX-3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  2. Fiabilité Mazda CX-30Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  3. Fiabilité Mazda 3 (2019-)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  4. SkyActivWikipedia (inglés) · Other source · consulted 27 September 2026
  5. Mazda CX-3Wikipedia (inglés) · Other source · consulted 27 September 2026
  6. Mazda CX-30Wikipedia (inglés) · Other source · consulted 27 September 2026
  7. Mazda3Wikipedia (inglés) · Other source · consulted 27 September 2026