Mazda Speed6 Super Fast Tuner Car on 2040-cars

Auto blog

2018 Mazda6 refresh takes the car further upmarket

The 2018 Mazda6 is, on the surface, a very mild refresh. The front grille has been given more depth, and the fascia is generally cleaned up a bit, putting the design inline with the new CX-5 and future Mazda products. The interior has been given the same treatment: cleaned up and modernized. But throughout the car, some important updates under the skin make the 6 a more compelling product, and one that continues the company's push upmarket. The biggest change has already been partly revealed, and that's the addition of Mazda's turbocharged 2.5-liter four-cylinder. It's the same engine found in the CX-9, and Mazda has now revealed it will make the same 250 horsepower and 310 pound-feet of torque with premium fuel. The engine will also happily accept 87-octane, in which case the engine will make 227 horsepower. Though the addition of this engine is welcome, we're a bit disappointed to learn that it will only be available with a six-speed automatic transmission. If we're lucky, we might see Mazda add a manual option, since when Mazda launched the current Mazda3, the larger 2.5-liter engine was initially only available with an automatic. But try not to get your hopes up too high, either. The good news is that Mazda will continue to offer a manual transmission as well as an automatic with the base, naturally aspirated 2.5-liter four-cylinder. This engine will now feature cylinder deactivation, as will the 2018 Mazda CX-5. This system will shut off the cylinders on each end at cruising speed to improve fuel economy. Official fuel economy ratings for both engines have yet to be released. Aside from the powertrain, Mazda says it has made a few other mechanical improvements. The suspension has been retuned, and the steering rack rigidly mounted to the chassis to improve handling. Thicker sheet metal for the rear wheel wells, thicker trailing arms, and a bevy of braces have also been added in order to reduce noise for a more refined driving experience. The interior has also been updated for more refinement, particularly on the new Signature trim model. The sleeker interior design on all Mazda6s is joined by redesigned seats Mazda says are more comfortable. Those seats are now available with optional ventilation. A windshield-projected heads-up display, adaptive cruise control that can bring the car to a stop and resume accelerating, as well as an instrument panel with a configurable 7-inch screen are other options.

Mazda hard at work on Skyactiv 2 engine technology

As Mazda continues the current rollout of its still-new Skyactiv technology, the automaker is already looking at improving its family of engines for even better fuel economy and emissions reductions. Automotive News reports that with stricter fuel economy and emissions regulations planned for 2020 and 2025 in Europe, Mazda will likely release engines with next-generation Skyactiv 2 technology by the end of this decade, and Skyactiv 3 units just five years later.
The latter is expected to focus on improved engine cooling and lessening energy losses, but the big news in AN's report is that the next-gen Skyactiv 2 engines will use Homogeneous Charge Compression Ignition, or HCCI. This type of ignition is very similar to how a diesel engine operates (with high compression and using the compression stroke for fuel combustion rather than spark plugs), a method said to provide a cleaner and more efficient fuel burn - to the tune of a 30-percent improvement in fuel economy compared to current Skyactiv engines. Other automakers, including Hyundai, have already announced they are developing HCCI powerplants with similar technology and characteristics, so Mazda likely won't be a lone wolf here.
Equipped with HCCI technology, Mazda figures to be able to compete with larger automakers in terms of fuel economy and emissions without resorting to hybrid powertrains, continuously variable transmissions or automatics relying on more forward gears (eight or more) for optimal efficiency. Some of the challenges of HCCI, according to AN, include the need for better engine cooling, risk of misfire at high and low rpm and uneven engine performance based on fuel properties.

Mazda says Skyactiv-X will come to the U.S, but not when

Mazda executives say the new 2.0-liter Skyactiv-X powerplant will still take some time to arrive to the North American market. The Skyactiv-X is a high-compression gasoline engine, and its 16:1 compression ratio is comparable to that of a diesel engine. "We have a lot of technology. And we are introducing each technology in each region when the time is right," said Mazda North America CEO Masahiro Moro at the SAE International WCX Conference, according to Automotive News. Moro stated that while the Skyactiv-X can indeed pass EPA emissions regulations, it's not in the immediate pipeline for U.S-bound Mazdas; the slightly less hardcore Skyactiv-G will be amended first. The launch-spec 2.5-liter Skyactiv-G engine in the new Mazda 3 will reportedly be supplemented by a 2.0-liter Skyactiv-G, which also has a bold compression ratio: according to Mazda, its ratio of 14:1 is the highest of any production gasoline engine. However, Moro didn't state the exact timeline for that Skyactiv-G's arrival, either. The compression ratio of the 2.5-liter "big block" available now is 13:1. In the 2019 model-year Miata roadster, the 2.0-liter Skyactiv-G makes 181 horsepower, and an earlier Slovakian Euro-spec leak mentioned the 2.0-liter 3's power figure at 164hp. The bottom line is thermal efficiency through being able to extract more energy out of gasoline, and moving from G to X would improve fuel economy by 20-30 percent while giving more power. If the Slovakian specifications are to be believed, the Skyactiv-X would make 178h p and 164 lb-ft in the Mazda3.