Mazda Announces SKY-G and SKY-D Engines to be Debuted in Tokyo

Yes, we have seen this Kiyora concept before, but the Japanese automaker is using the show car to help showcase its new eco-friendly SKY-G and SKY-D powertrains at the 2009 Tokyo motor show.

Mazda has reportedly been interested in eking the most fuel efficiency from its internal combustion engines, and the SKY range – so named because Mazda desires an “everlasting blue sky” – is the first step towards that goal. Using these new engines, Mazda hopes to reduce its corporate average fuel economy by 30 percent by 2015.

As its name suggests, the SKY-G is the company’s take on a thrifty gasoline engine. Although the company hasn’t yet released any specifications on the motor (displacement, for instance, is still a mystery), it does claim the all-new direct-injection engine delivers a 15 percent increase in fuel economy and torque over the company’s present 2.0-liter I-4. If installed in a Mazda3, the engine could purportedly return fuel economy similar to a Mazda2.

We’re also left in the dark about the displacement of the SKY-D diesel engine, but we’re told the new design offers a 20 percent jump in fuel efficiency over the current 2.2 liter. This improvement is achieved by a changed combustion chamber shape and further optimized fuel delivery. A two-stage turbocharger and piezo injectors also help to improve fuel economy. According to Mazda, this engine installed in a Mazda6 could return fuel economy figures comparable to a Mazda2.

Along with the SKY engines, Mazda will also display its new SKY-Drive automatic transmission. The gearbox reportedly helps to reduce fuel consumption by5 percent by reducing frictionin, modifying the torque converter design, and changing when the torque converter locks up.


Buying Guide

2010 Mazda Mazda3

Fair Market Price $8,782 i SV Sedan
Motor Trend Rating


25 City / 33 Hwy

Safety (IIHS):


Horse Power:

148 @ 6500