This Is What Mazda EPA MPG Results Will Look Like With Skyactiv-X HCCI Engines (Asterisk, Fine Print, Subject To Change)

Mazda announced on August 8th what had long been rumored. The small Japanese automaker has successfully overcome the remaining issues which held at bay mass production of gasoline compression ignition.

Essentially, Mazda’s Skyactiv-X engines, due first in the next-generation 2019 Mazda 3, is intended to bring diesel-like ignition to small, supercharged four-cylinder engines, along with diesel-like fuel economy. However, the gas-fired Skyactiv-X engines will be wildly cleaner than diesel powerplants. Mazda has said in the past that these HCCI engines will likely limit the need for continuously variable transmissions. We also learned, with Mazda’s latest pronouncement, that the company’s Skyactiv-X engines will be significantly torquier than their Skyactiv-G predecessors.

If Mazda can live up to its pronouncements — the company says the engines are “still under development and figures are subject to change” — it’ll be a win for both the environment and driving enthusiasts. And because Mazda also claims a 20-30-percent improvement in fuel efficiency, it’ll be a win for your bank account, as well.

We wanted to see exactly where Mazda’s alleged fuel savings will put Mazda’s current products on the EPA’s miles per gallon scale, so here are the results of some quick math.

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Nah, We're Keeping Our Fuel Economy Targets: EPA

Fuel economy standards set by the Obama administration for the 2022 to 2025 model years will remain, the Environmental Protection Agency has stated.

The environmental regulator announced its proposed determination earlier today, part of its midterm review of the country’s corporate average fuel economy (CAFE) targets. Forget cheap gas and never mind the SUV craze — 54.5 miles per gallon is still the government’s goal.

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U.S. Fuel Economy Targets Too Difficult and Costly to Meet: Automakers

A group of automakers wants Big MPG to know they’re out of touch when it comes to fuel efficiency targets, and would really like it if they stopped paying so much attention to California.

The Alliance of Automobile Manufacturers — a Washington lobbying group made up of General Motors, Ford, Fiat Chrysler Automobiles, Volkswagen and Toyota — wants to impact the midterm review of 2025 fuel economy targets set in 2011, Bloomberg reports.

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Saudi Arabia Latest To Fleet-Average Fuel Economy Mandate Party

As in the United States, Europe and Japan, Saudi Arabia is now mandating new vehicles be more fuel efficient. Like the U.S., however, the Saudis will put the onus on the automakers without raising a cent on fuel prices.

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Expert: 54.5 MPG CAFE Mark Reachable With Few Plug-Ins

For automakers worried about meeting the 54.5 mpg CAFE mark by 2025, Johnson Controls — the ones who predicted the end of the steering wheel by 2025 — assured them that the target could be met, and without the need to turn everything into a plug-in or full EV.

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  • RICHARD @mebgardner I have no issues with the way the car is configured. No offensive nannies.
  • RICHARD @el_scotto above
  • RICHARD @SPPP. It's the perfect use case. Most of my wife's driving is short trips around town. The car will get better MPG in that environment than interstate cruising.
  • RICHARD The longest interstate trip I have been on so far is about 45 minutes. We live in Tennessee so that included significant elevation changes and travel at 75 mph. Next weekend, we will take a 3-hour trip for a wedding. I would not hesitate to drive long distances in this car. It is much more comfortable, quiet, composed than my wife's previous Ford Fusion Titanium while matching that car's performance. We drove from TN to Santa Fe, NM in the Fusion earlier this summer and that car became uncomfortable and tiring after about 3 hours behind the wheel.
  • Tassos The EQS is the best looking BEV, better than even the only Tesla I would ever consider (the S) and more luxurious inside etc etcThe self driving features will come in handy when I'm 110 and my eyesight and reaction times start to suffer.But that's four decades away, and only Tim recommends 40 year old "used cars"