Also known as: skyactiv-x, skyactiv x, spcci, e-skyactiv x
Mazda's compression-ignition petrol — the 2.0 in the 3 and CX-30, and the 3.0 straight-six in the CX-60.
⚑ It burns petrol the way a diesel burns diesel, and that is not marketing. Under most of its operating range the mixture ignites from compression alone; the spark plug fires to create a small expanding flame kernel that raises the pressure enough to set off the rest. Mazda calls it spark-controlled compression ignition, and the catalogue's own note on it is the right summary: it behaves like neither.
So both bodies of experience mislead here. A petrol technician's instinct about knock is wrong, because controlled knock is the combustion mode. A diesel technician's instinct about injection timing is wrong, because the fuel is petrol and the transition between modes is what the control strategy is really doing.
It carries a supercharger that is not there for power. It supplies the very lean mixture the process needs, which means a boost-related fault presents as rough running rather than as a lack of performance — the opposite of every other supercharged engine.
It is direct-injection and it is mild-hybrid, so intake-valve carbon and belt-starter-generator faults are both in scope. A start-stop or charging complaint on one of these is a question about the hybrid system, not about the engine.
Specialist experience is genuinely thin and generic advice is actively risky here. Where a procedure exists, follow Mazda's.
Cars fitted with this engine
3 generations, across 1 make. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Posted about this engine
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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