Mazda 2.0 Skyactiv-G Engine Specs, Oil Change, Review & History

Mazda’s 2.0 Skyactiv-G engine runs on the Atkinson cycle, burns gases like diesel and has direct fuel injection. Is the advanced technology from Japan also durable? This is an important question from our point of view.

Mazda 2.0 Skyactiv-G Engine Specs Reviews Problems Reliability

In 2012, Japan introduced a new type of gasoline engine. Mazda’s 2.0 Skyactiv-G engine is quite revolutionary, because even though it doesn’t offer supercharging, it has direct injection (multi-hole injectors) and an incredibly high compression ratio of 14.0: 1.

Apart from that, the power works a bit like a diesel engine. Due to the high pressure and temperature, gasoline can ignite. The key to success is also eliminating knocking – achieved with a new piston shape and a longer exhaust manifold to prevent additional heating of the block.

2.0 Skyactiv-G Specs

But the list of innovations for Mazda’s Skyactiv-G engine doesn’t stop there. Because these machines work on the Atkinson cycle. This is also the same that many Toyota hybrids use. Not closing the valve at the start of the work cycle ensures the high efficiency of the gasoline engine.

In addition, some versions of the Mazda 6 are equipped with the i-ELOOP system. It is a Formula 1 inspired solution that restores kinetic energy while driving. Mazda’s 2.0 Skyactiv-G engine is 1998cc, inline four-cylinder, time chain, cylinder head and block made of aluminum.

2.0 Skyactiv-G Performance

The performance characteristics of the Mazda 2.0 Skyactiv-G are quite specific. Although the engine is naturally aspirated, it can have a power of up to 165 horsepower. In addition, it has flat torque and offers good dynamics, especially at low speeds.

When a car is driving on the highway, for example, the acceleration becomes slower. Especially when the driver decides to use an automatic transmission when setting up the vehicle – even if it has pedals, it does not allow the driver, for example, to reduce the gear ratio in every situation. Advantages? 2.0 Skyactiv-G engine is quiet and petrol is very economical.

2.0 Skyactiv-G Installed on

  • Mazda 3
  • Mazda CX-3
  • Mazda CX-30
  • Mazda 5
  • Mazda 6
  • Mazda CX-5
  • Mazda MX-5

2.0 Skyactiv-G Power

  • 120 HP, 210 Nm
  • 122 HP, 213 Nm
  • 145 HP, 210 Nm
  • 150 HP, 204 Nm
  • 165 HP, 210 Nm

2.0 Skyactiv-G Engine Problems & Reliability

Finally, a fundamental question arises. How does this 2.0 Skyactiv-G petrol engine work in practice? In order to find out what kind of engine failure problem Mazda’s Skyactiv-G 2.0 looked like, I looked through the fan forum of the Japanese brand. Conclusion? The post mainly contains information on three types of errors.

  • The first problem, the drivers recounted, included cases where the drive unit died right after starting. The reason is not the battery or the immobilizer – the mechanics put it first. A faulty flow meter is the problem. Just disconnect the device from the machine and start working normally – like a check. In the end, replacement is still needed.
  • The second issue relates to a significant drop in Mazda’s 2.0 Skyactiv-G engine power and a drop in performance. Reason? Often the problem is caused by a leak in the intake system. The additional amount of air entering the combustion chamber changes the composition of the fuel mixture and makes the combustion process less efficient. In this regard, it should be noted that the cracks that appear in the intake manifold are often micro-shaped. This means that at first they will not be noticed by the driver or mechanic.
  • The third problem with the Mazda 2.0 Skyactiv-G engine is the pneumothorax valve. The fault is very difficult to diagnose. Symptoms? The unit operation is louder and there is no power. The repair shop, acting somewhat blindly, usually replaces the spark plugs first, and then the knock sensors. The second procedure is very expensive – the probe itself costs about $ 190, and for a replacement – due to the fact that it’s hidden deep in the machine – you’ll often have to pay another $ 190. How to identify pneumothorax valve damage? You have to find a little oil in the intake. This enters the combustion chamber and causes knocking combustion – a source of low noise and power.

Two interesting things in posts found on Mazda enthusiasts forum.

  • First, all the flaws I can find in a car that has a mileage of less than 100,000 kilometers.
  • Secondly, there is no shortage of information from drivers using a Mazda 2.0 Skyactiv-G engine for a range of 200,000 – 300,000 kilometers and no errors so far!

And this only proves that the Japanese engine can be very durable. How to keep it in good condition? Of course, through regular servicing – Mazda recommends changing the oil and filter every 20,000 kilometers or once a year.

How does Mazda’s 2.0 Skyactiv-G engine predict the future? There are two main problems, potentially and from an operational point of view. This is undoubtedly a very durable structure. However, this means it is difficult to rely on a variety of parts.

As a result, spare parts such as the pneumothorax valve may be available primarily at the Dealer in the original form which is very expensive. Also, keep in mind that the Japanese engine still has a modern and unusual design. Thus, not all mechanics know about it and not everyone can fix it.


Several years have passed since the launch of Mazda’s 2.0 Skyactiv-G engine, and the unit was installed in a series of popular models. He is optimistic that so far there is not much information about the excessive failure rate of the structure.

And because the engine offers satisfactory performance and low fuel consumption, it is one of the recommended gasoline engines to buyers in the after-sale market.


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