All New 2017 Mazda 3

**travajante** · February 15th, 2018 11:46 AM

Originally Posted by jojopad

New video from Engineering Explained on Mazda's new engine technology that will give naturally aspirated internal combustion engine more years before it becomes obsolete. The upcoming Mazda3 will use this new engine.

How Mazda Is Saving The Gasoline Engine - SkyActiv-X - YouTube

16:1, regular petrol, lean supercharged super quick TDC combustion, super efficient, low emissions...Response w/o FC sacrifice...What more can we ask?[emoji106]Combustion chamber pressure sensor does the magic here. Awesome! Wonder what that 3rd gen Skyactiv engine (Sky3) does next.

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**jojopad** · February 15th, 2018 12:18 PM

Originally Posted by travajante

16:1, regular petrol, lean supercharged super quick TDC combustion, super efficient, low emissions...Response w/o FC sacrifice...What more can we ask?[emoji106]Combustion chamber pressure sensor does the magic here. Awesome! Wonder what that 3rd gen Skyactiv engine (Sky3) does next.

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Interestingly the Mazda engineers used 87 octane gasoline to force the engine to knock:

Mazda’s new SkyActiv-X engine will go against every convention you thought you understood about gasoline engines. It’s supercharged, but for efficiency purposes, not to increase power. It has a compression ratio of 16:1 (in current prototype form) yet runs on 87 octane fuel. It relies on the Miller cycle (or modern Atkinson cycle) when it wants to make power, yet runs a traditional cycle, albeit with compression ignition, when it wants to be efficient. It’s a gasoline engine that encourages knock, but in a controlled manner… What?

It sounds confusing at first, and unfortunately the complications accumulate as you dive deeper. Mazda is doing something nearly every auto-manufacturer has thought about, researched, and certainly desired, but they did it all with the help of a spark plug. Spark Controlled Compression Ignition (SPCCI) is a new method of combustion that allows gasoline engines to run on compression based ignition. In other words, it takes the combustion methodology of a diesel engine, while using the timing methodology of a spark-ignited gasoline engine.

For those who prefer to read than to watch the video, here's the article from the same person who made the Engineering Explained youtube vid:

How Mazda's Compression-Igntion Engine of the Future Works

**jojopad** · February 15th, 2018 12:28 PM

Originally Posted by ValHallen

Hmmm... Technical but very interesting.

The Skyactiv engine is really quite interesting compared to the engines of popular car brands like Toyota and Honda. I'm not really someone into car engine geekness but after experiencing how efficient the Mazda Skyactiv engine really is motivated me to learn more about it

**travajante** · February 15th, 2018 09:27 PM

Originally Posted by jojopad

The Skyactiv engine is really quite interesting compared to the engines of popular car brands like Toyota and Honda. I'm not really someone into car engine geekness but after experiencing how efficient the Mazda Skyactiv engine really is motivated me to learn more about it

Dave dragged me to my 1st Mazda.[emoji16]

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**Drew2355** · February 17th, 2018 09:51 PM

Hi guys. Any Idea if when will the all new mazda 3 will arrive? I would really appreciate if someone answer my question because I’m planning to buy one but if it will come out soon maybe I can wait.
Thank you

**jojopad** · February 17th, 2018 09:56 PM

Originally Posted by Drew2355

Hi guys. Any Idea if when will the all new mazda 3 will arrive? I would really appreciate if someone answer my question because I’m planning to buy one but if it will come out soon maybe I can wait.
Thank you

Are you referring to the sleek M3 powered by the new SkyActiv X?

219 Mazda 3 spied with SkyActiv-X engine

It's probably going to be year 2020 for PH.

The 2nd tier excise tax for vehicles will be implemented on 2019. That's something to muse on.

**Drew2355** · February 17th, 2018 10:39 PM

Originally Posted by jojopad

Are you referring to the sleek M3 powered by the new SkyActiv X?

219 Mazda 3 spied with SkyActiv-X engine

It's probably going to be year 2020 for PH.

The 2nd tier excise tax for vehicles will be implemented on 2019. That's something
to muse on.

Yeah. I think the one that was previewed in tokyo. Thank you for answering my concern.

**Archerfish** · February 17th, 2018 11:38 PM

Originally Posted by jojopad

...

For those who prefer to read than to watch the video, here's the article from the same person who made the Engineering Explained youtube vid:

How Mazda's Compression-Igntion Engine of the Future Works

I am one of those who prefer to read. Thank you, I really appreciate it. It may be said that it is an advertisement of some sort. However, the way now I appreciate how a car is described as "fun to drive" (SKYACTIV-D thread) makes me more inclined to believe that this is more than just advertising.

This is an engineering feat, in my opinion. In school, we are taught that Otto Cycle has a compression ratio of 12:1 while a Diesel Cycle is greater which has a range from 18:1 and above. So, a gasoline engine is limited that it cannot go beyond a compression ratio of 14:1. Mazda made everything (almost) against conventional practices which for me is an engineering feat.

**jojopad** · February 19th, 2018 10:41 AM

Latest update from a Mown3r of a 2017 Mazda3 Speed HB. The most glaring issue is with the Motolite replacement EFB acid leakage. Quick tip: always do a weekly checkup on battery leaks!

Despite a liberal application of duct tape on the Enhanced Flooded Battery (EFB), the replacement Motolite battery continues to leak or vent out corrosive acid. This is evidenced by the labels on the battery almost turning black on the edges, and even more worrisome is that it’s starting to eat through the metal battery tie-down. It’s become so bad in places that the battery tie-down has almost been eaten through.

Although we cannot confirm why this is happening with the Motolite battery, a quick Google search reveals that owners have been complaining of the battery’s poor construction. The plastic, they say, used on the battery case is thin and prone to cracking. For example, an overly tightened battery tie-down would be enough to cause small cracks, enabling corrosive acid to vent out. Although the damage is so far limited to just the battery tie-down, we’re hoping Mazda Philippines would be replacing the battery and battery tie-down for safety reasons.

Overall the Mown3r seems to be happy with the M3's engine performance and fuel efficiency.

The article also mentioned about the "visible" engine hood insulation that can be bought separately:

Interestingly, the Mazda3 integrates its engine insulation into the plastic engine cover saving weight and cutting assembly complexity in the process. However, if you’re a bit OC and feel naked without seeing an engine insulator installed, you can actually get one specific to the Mazda3. Designed for the Skyactiv-D variant, you can order the hood insulator (Part # B45A56681), 10 hood fasteners (Part # TD1156694), and the rubber protectors (Part # GHP9-56-9Z1 for the left and Part # GHP9-56-9Z2B for the right). Not only does it make the engine look “more complete” it actually does makes the engine seem quieter. And given our problem with the leaking battery acid, it also offers additional protection (better the hood insulator than the hood itself, right).

217 Mazda3 Speed: Long Term Test Update # 4 | Philippine Car News, Car Reviews, and Prices | ************

**travajante** · February 19th, 2018 10:00 PM

Originally Posted by jojopad

Latest update from a Mown3r of a 2017 Mazda3 Speed HB. The most glaring issue is with the Motolite replacement EFB acid leakage. Quick tip: always do a weekly checkup on battery leaks!

Or, go w/ the better spec'd & priced EFB from Johnson Controls...the company that owns Varta, Optima & many more. Contact OVTph +639174726847 for details.

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