6 ms·

>Compression ignition and a supercharger fitted to improve fuel economy together deliver unprecedented engine response and increase torque 10-30 percent over th

>Compression ignition and a supercharger fitted to improve fuel economy together deliver unprecedented engine response and increase torque 10-30 percent over the current SKYACTIV-G gasoline engine.*3 Wow. I already have a 2016 Mazda 3 that gets around 40MPG (even though it's not a hybrid) and it's already pretty peppy. Probably the best car I've owned, and I've owned several nice sports sedans. Getting 40MPG is too convenient when you make longer commutes, not to mention the thing cost ~20k at 0% APR. Blows any hybrid out of the water for total COO.

IgorPartola 9y ago
I think you are misreading that. The increase of 10-30 percent is in torque, not MPG.
- Danihan 9y ago
  Gah, you're right, thanks. Edited.
- ddeck 9y ago
  This is correct, but they're are also predicting an equivalent improvement in fuel consumption: "Compared to the current lineup of SkyActiv-G engines, the SkyActiv-X line should use between 20 and 30 percent less fuel." http://newatlas.com/mazda-skyactiv-x-compression-ignition/50803/ http://newatlas.com/mazda-skyactiv-x-compression-ignition/50...
  - flamedoge 9y ago
    more torque = less rpm @ same hp?
    - toxik 9y ago
      Torque is directly proportional to power, related by angular velocity. So τ Nm of torque at angular velocity ω rad/s will give you power P = τ·ω in watts. In fact this works for three-dimensional τ and ω if · is the scalar product. Oh and an RPM of N is equivalent to angular velocity ω = N·π/30.
coherentpony 9y ago
Are those imperial gallons or US gallons?
- Danihan 9y ago
  US gallons
- greggyb 9y ago
  I can get 40MPG (US) highway with a 2015 Mazda3 and a somewhat aggressive driving style. City is usually low 30s. The manual transmission is also one of the nicest I've ever driven. These are great cars.
  - prodikl 9y ago
    loved my 6-speed 2015 mazda 6. highway miles were truly amazing for a full sized sedan. like others said i'm glad to see mazda continuously innovating. it's paying off
  - aidenn0 9y ago
    I only wish you could get the 2.5L in a manual with no moonroof. That would probably get me to buy a new car. I have an 07 Mazdaspeed3 that is getting long-in-the-tooth, and it gets terrible mileage (19 in town, high 20s on the freeway). The best I can say about the shifter is that you get used to it. I don't think I need quite as much pep as my current car (plus all current hatchbacks that are comparable performance are north of $30k), and the 2.5L engine in the Mazda3 is nice. I like the Mazda3 better than the Focus, but if I had to get a car today it would probably be the Focus ST.
    - thenewwazoo 9y ago
      For what it's worth, I went from a WRX to a 2L 3i and don't miss the extra horsepower because we felt, frankly, that they're all slow, so why pay a premium for slightly less slow? With that said, it's plenty fast enough for city driving and is the most fun FWD drive car I've driven, bar none. Hell, it's the best car I've owned and only barely not the most fun (after my RX-7). The interior is great, it's cheap to run, ...
borski 9y ago
OK, so honest question: I have a 2012 Mazda 3 which, presumably, gets 40mpg. But I can't realistically get anything above 29mpg on average. Am I just an aggressive driver? :) [edit] I agree, by the way, that the cars are incredibly fun to drive, for being "fuel efficient."
- greggyb 9y ago
  2012 had half Skyactiv and half .. non-Skyactiv. The expected MPG on the non is around 30. You'd have a badge on the rear of the car (if sold in US, at least) that would indicate Skyactiv.
  - borski 9y ago
    I have the badge.
    - greggyb 9y ago
      I had the 2012 for a few years. When I was driving 80%+ highway, I would struggle to get below 35MPG or above 42MPG. On a 50%-50% split, I would be in the mid 30s, usually 36MPG or 37MPG. When I was 80% city, I would be around 32MPG on average. That car does not have much low-end torque, so if you accelerate aggressively from stops you can definitely tank the MPG. I didn't see much impact from aggressive acceleration at highway speeds (e.g. going from 30MPH to 70MPH on an on-ramp, or pulling around a slow group of cars going from 45MPH-70+MPH). I did see a lot of impact from flooring it 0-30. Hope this context is helpful.
- bigtech 9y ago
  Have you tried 'hypermiling'? https://en.wikipedia.org/wiki/Energy-efficient_driving https://en.wikipedia.org/wiki/Energy-efficient_driving
- syphilis2 9y ago
  I have a 2012 Mazda3 sedan with the 2.0L Skyactiv-G engine. I drive a daily commute on a 50-50 highway/stop-n-go mix. My average mpg has consistently been 35 mpg (40 highway, 32 off). The hatchback has slightly worse mpg, so does the manual transmission, but 29 mpg sounds more like the non-skyactiv 2.0L engine. The 2.5L sport engine would be closer to 25 mpg. I'd check under the hood just to make sure :) then fill up the tires, reset the average fuel economy, and baby it on the highway to see if you can get around the expected 40 mpg.
serpix 9y ago
That is horrible mileage. I remember averaging that on a 1997 Opel Astra.
- MagnumOpus 9y ago
  Your Astra weighed 1000lbs less, had no air conditioning and probably no air bags and would have probably killed you in a 40mph collision though, innit?
  - dpark 9y ago
    And that mileage was presumably measured using imperial gallons, which are 20% larger than US gallons. And it probably didn't get 40mpg anyway unless it was on the highway 100% of the time. http://www.carfolio.com/specifications/models/car/?car=267322#a_economy http://www.carfolio.com/specifications/models/car/?car=26732...
- tannhauser23 9y ago
  You're trolling, right? 40mpg is pretty great.
  - YSFEJ4SWJUVU6 9y ago
    In certain contexts, certainly. Modern small cars with small engines can be quite fuel efficient in highway driving, though, and there 40 mpg isn't quite the very top. A month ago or so I did a trip in a 2016 Seat Toledo (petrol, non-hybrid), and the drive computer reported the consumption as 3.9 L/100 km after 150 km of driving at speeds from 60 to 100 km/h, averaging IIRC 78 km/h. A 80 km strip at 120 km/h increased the average to 4.2 L/100 km.
- aphextron 9y ago
  As long as we're one-upping, I'll jump in here to say that my Nissan Leaf gets 140 MPG ;)
- mikeash 9y ago
  Any chance your MPG was measured on imperial gallons? Looks like 40MPG imperial would be normal for that car, but 40MPG US would be a fair bit more than expected.
mywittyname 9y ago
> Blows any hybrid out of the water for total COO. Not so sure about this. I have a 2014 3i GT and my wife has a 2014 Prius. Hers was cheaper to buy, gets way better mileage (29 v. 44) and needs less frequent oil changes (which are free), and is worth about $1200 more now. It's a little faster, nicer inside, and much more fun to drive. But cheaper, nah.
- raman325 9y ago
  I'd assume the parent comment is referring to the base package version of the Mazda 3. I was able to get a 2015 Mazda3 S Touring for ~$25k with all taxes and fees included, so I think $20k is a fair estimate if you assume the base package
  - neogodless 9y ago
    Indeed. I was shopping recently and the 2017 Sport was going for under $18k with current Mazda incentives ($2k cash.) (I ended up with a 2015 S GT for $20k - only 8k miles on the odometer :)!) Also - that's an i (2.0L) which gets 30/40 mpg (about 34-35 overall) so not quite the stark difference in fuel economy compared to a Prius that the 2.5L has. (gallons per 100 mile difference between 35 mpg and 44 mpg is 2.86 vs 2.27)
sundvor 9y ago
Agree, these are awesome cars. I have the 2014 Mazda 3 2.5l (SkyActiv) Astina, in a manual sedan. I do lots of commuting peak hour traffic, so my economy is seriously affected - I get about 9l / 100km on those days. On a proper open highway 100-110km/h drive I'll be on around 5-6l / 100km however. Acceleration is very zippy indeed, and the manual whilst not inviting the most efficient driving is an easy changing, short throw type. Tech level in the car is amazing: Radar cruise, AEB, blind spot monitoring, rear cross alert, Adaptive Front Lights (inside lights looks into the corner), etc etc. It's very exciting to see normal petrol engines becoming so much efficient. Kudos to Mazda here. I'm hoping they'll have a hybrid or even all electric out by the time it's time for me to upgrade the current one.

IgorPartola 9y ago

I think you are misreading that. The increase of 10-30 percent is in torque, not MPG.

Danihan 9y ago
Gah, you're right, thanks. Edited.
ddeck 9y ago
This is correct, but they're are also predicting an equivalent improvement in fuel consumption: "Compared to the current lineup of SkyActiv-G engines, the SkyActiv-X line should use between 20 and 30 percent less fuel." http://newatlas.com/mazda-skyactiv-x-compression-ignition/50803/ http://newatlas.com/mazda-skyactiv-x-compression-ignition/50...
- flamedoge 9y ago
  more torque = less rpm @ same hp?
  - toxik 9y ago
    Torque is directly proportional to power, related by angular velocity. So τ Nm of torque at angular velocity ω rad/s will give you power P = τ·ω in watts. In fact this works for three-dimensional τ and ω if · is the scalar product. Oh and an RPM of N is equivalent to angular velocity ω = N·π/30.

coherentpony 9y ago

Are those imperial gallons or US gallons?

Danihan 9y ago
US gallons
greggyb 9y ago
I can get 40MPG (US) highway with a 2015 Mazda3 and a somewhat aggressive driving style. City is usually low 30s. The manual transmission is also one of the nicest I've ever driven. These are great cars.
- prodikl 9y ago
  loved my 6-speed 2015 mazda 6. highway miles were truly amazing for a full sized sedan. like others said i'm glad to see mazda continuously innovating. it's paying off
- aidenn0 9y ago
  I only wish you could get the 2.5L in a manual with no moonroof. That would probably get me to buy a new car. I have an 07 Mazdaspeed3 that is getting long-in-the-tooth, and it gets terrible mileage (19 in town, high 20s on the freeway). The best I can say about the shifter is that you get used to it. I don't think I need quite as much pep as my current car (plus all current hatchbacks that are comparable performance are north of $30k), and the 2.5L engine in the Mazda3 is nice. I like the Mazda3 better than the Focus, but if I had to get a car today it would probably be the Focus ST.
  - thenewwazoo 9y ago
    For what it's worth, I went from a WRX to a 2L 3i and don't miss the extra horsepower because we felt, frankly, that they're all slow, so why pay a premium for slightly less slow? With that said, it's plenty fast enough for city driving and is the most fun FWD drive car I've driven, bar none. Hell, it's the best car I've owned and only barely not the most fun (after my RX-7). The interior is great, it's cheap to run, ...

borski 9y ago

OK, so honest question: I have a 2012 Mazda 3 which, presumably, gets 40mpg. But I can't realistically get anything above 29mpg on average. Am I just an aggressive driver? :) [edit] I agree, by the way, that the cars are incredibly fun to drive, for being "fuel efficient."

greggyb 9y ago
2012 had half Skyactiv and half .. non-Skyactiv. The expected MPG on the non is around 30. You'd have a badge on the rear of the car (if sold in US, at least) that would indicate Skyactiv.
- borski 9y ago
  I have the badge.
  - greggyb 9y ago
    I had the 2012 for a few years. When I was driving 80%+ highway, I would struggle to get below 35MPG or above 42MPG. On a 50%-50% split, I would be in the mid 30s, usually 36MPG or 37MPG. When I was 80% city, I would be around 32MPG on average. That car does not have much low-end torque, so if you accelerate aggressively from stops you can definitely tank the MPG. I didn't see much impact from aggressive acceleration at highway speeds (e.g. going from 30MPH to 70MPH on an on-ramp, or pulling around a slow group of cars going from 45MPH-70+MPH). I did see a lot of impact from flooring it 0-30. Hope this context is helpful.
bigtech 9y ago
Have you tried 'hypermiling'? https://en.wikipedia.org/wiki/Energy-efficient_driving https://en.wikipedia.org/wiki/Energy-efficient_driving
syphilis2 9y ago
I have a 2012 Mazda3 sedan with the 2.0L Skyactiv-G engine. I drive a daily commute on a 50-50 highway/stop-n-go mix. My average mpg has consistently been 35 mpg (40 highway, 32 off). The hatchback has slightly worse mpg, so does the manual transmission, but 29 mpg sounds more like the non-skyactiv 2.0L engine. The 2.5L sport engine would be closer to 25 mpg. I'd check under the hood just to make sure :) then fill up the tires, reset the average fuel economy, and baby it on the highway to see if you can get around the expected 40 mpg.

serpix 9y ago

That is horrible mileage. I remember averaging that on a 1997 Opel Astra.

MagnumOpus 9y ago
Your Astra weighed 1000lbs less, had no air conditioning and probably no air bags and would have probably killed you in a 40mph collision though, innit?
- dpark 9y ago
  And that mileage was presumably measured using imperial gallons, which are 20% larger than US gallons. And it probably didn't get 40mpg anyway unless it was on the highway 100% of the time. http://www.carfolio.com/specifications/models/car/?car=267322#a_economy http://www.carfolio.com/specifications/models/car/?car=26732...
tannhauser23 9y ago
You're trolling, right? 40mpg is pretty great.
- YSFEJ4SWJUVU6 9y ago
  In certain contexts, certainly. Modern small cars with small engines can be quite fuel efficient in highway driving, though, and there 40 mpg isn't quite the very top. A month ago or so I did a trip in a 2016 Seat Toledo (petrol, non-hybrid), and the drive computer reported the consumption as 3.9 L/100 km after 150 km of driving at speeds from 60 to 100 km/h, averaging IIRC 78 km/h. A 80 km strip at 120 km/h increased the average to 4.2 L/100 km.
aphextron 9y ago
As long as we're one-upping, I'll jump in here to say that my Nissan Leaf gets 140 MPG ;)
mikeash 9y ago
Any chance your MPG was measured on imperial gallons? Looks like 40MPG imperial would be normal for that car, but 40MPG US would be a fair bit more than expected.

mywittyname 9y ago

> Blows any hybrid out of the water for total COO. Not so sure about this. I have a 2014 3i GT and my wife has a 2014 Prius. Hers was cheaper to buy, gets way better mileage (29 v. 44) and needs less frequent oil changes (which are free), and is worth about $1200 more now. It's a little faster, nicer inside, and much more fun to drive. But cheaper, nah.

raman325 9y ago
I'd assume the parent comment is referring to the base package version of the Mazda 3. I was able to get a 2015 Mazda3 S Touring for ~$25k with all taxes and fees included, so I think $20k is a fair estimate if you assume the base package
- neogodless 9y ago
  Indeed. I was shopping recently and the 2017 Sport was going for under $18k with current Mazda incentives ($2k cash.) (I ended up with a 2015 S GT for $20k - only 8k miles on the odometer :)!) Also - that's an i (2.0L) which gets 30/40 mpg (about 34-35 overall) so not quite the stark difference in fuel economy compared to a Prius that the 2.5L has. (gallons per 100 mile difference between 35 mpg and 44 mpg is 2.86 vs 2.27)

sundvor 9y ago

Agree, these are awesome cars. I have the 2014 Mazda 3 2.5l (SkyActiv) Astina, in a manual sedan. I do lots of commuting peak hour traffic, so my economy is seriously affected - I get about 9l / 100km on those days. On a proper open highway 100-110km/h drive I'll be on around 5-6l / 100km however. Acceleration is very zippy indeed, and the manual whilst not inviting the most efficient driving is an easy changing, short throw type. Tech level in the car is amazing: Radar cruise, AEB, blind spot monitoring, rear cross alert, Adaptive Front Lights (inside lights looks into the corner), etc etc. It's very exciting to see normal petrol engines becoming so much efficient. Kudos to Mazda here. I'm hoping they'll have a hybrid or even all electric out by the time it's time for me to upgrade the current one.