Dealer in Vancouver, WA shows 23 of them... can't pull up any window stickers though.
2018 cx5
- Thread starter STLpilot
- Start date
"Cylinder deactivation is more effective at low speeds, improving fuel economy by some 20% when driving at a constant 40 km/h, and by about 5% at a constant 80 km/h"
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- Denver, CO
Yes.
I have a route back home on a 30 mph road. Seems due to million dollar homes the speed limit is kept low. I would love the 20% FE on top of 40 mpg I get doing 32 on that stretch.
Let the system come out - see if there is a disable option and see if it fits your style. Otherwise more std features on 18s is great. Get a feeling more dealers will stock Sport with iActiv
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- Plano, Texas, USA
Is Mazda out of its mind? Who wants to drive a “2-cylinder” at 25 mph in the city? I can see some benefit with cylinder deactivation driving at constant highway speed, but definitely not at lower speed environment which needs power for stop-and-go traffic. But highway speed limit is no longer 55 mph like Mazda designed to save fuel at 50 mph. With current 70~80 mph highway speed limit I really doubt how much fuel this system can save. Mazda really screwed up this cylinder deactivation thing which always has bad reputation!
^^This level of condemnation seems a bit early but I don't think 2 cylinders is going to cut through 70-80mph of wind drag effectively enough to deploy even assuming no hills or headwinds so I'm skeptical there also and if this was equipped with a kill switch (which I'm sure it isn't) I'd likely use it...but let's see what happens. Clearly they're convinced any ill-effects are non-existent to very minimal.
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- Plano, Texas, USA
I watched Mazda video and it doesnt mention any special designs to prevent common problems from cylinder deactivation on burning oil and fouling spark plugs. For $129.08 MSRP a set of SkyActiv-G PE5R-18-110 spark plugs theyre very expensive to replace. Should we expect much shorter replacement interval on spark plugs than current 75,000 miles?
Just another nail in the coffin for me. I already don't like the looks of the redesign, no offense to you who bought 2017s, and now this. Why take a steller engine and add ridiculous gadgetry to it? I can already achieve 36 mpg on the highway and am averaging 28 to 30 combined. But only time will tell how well this system performs and how long the new components last.
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- Denver, CO
Yeah that's pretty concerning.
Most americans look at EPA and decide. It will be great for cruisers who just glide at speed limits or so and will see a 10% FE overall. Which is still great. Remember - the Skyactiv is really good for city style driving. Add 10% to it will be fantastic. My gut feeling is city EPA will go up by 2 mpg. Highway by 1.
I dont know how a 16 can get 36 on highway in AWD but i assume its single occupant with virtually no headwind or better - tail winds.
I dont know how a 16 can get 36 on highway in AWD but i assume its single occupant with virtually no headwind or better - tail winds.
More like a fully loaded car with 2 adults @ 60 mph for hours on end on flat highway, not impossible...
I'm not a fan of cylinder deactivation, but I understand why Mazda is doing it. Fuel economy and emissions standards continually get tighter. Every MPG counts. That's why every new car is saddled with electric power steering that nobody likes. And why everyone is moving to direct injection, despite problems industry wide problems with carbon deposits. And it's why manual transmissions are being phased out while CVTs and 8-10 speed transmissions are being phased in.
I am taking the wait and see approach. I listed our speed limits in another post so it should make a difference
60 mph is highway speed?
What is fully loaded then - a duffel bag with a pack of gummy bears.
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- Denver, CO
What's funny is I think the 2.0L manual CX-5's got the best MPG, did they not?
I haven't driven a car with cylinder deactivation. How long does it take to re-activate cylinders? If we are talking a few hundred milliseconds, then it may not affect acceleration enough to be noticeable. If it only comes into play when you are cruising at constant speed, and instantaneously reverts to 4 cylinders when you press the throttle, then it seems like all good assuming there aren't reliability problems.
If it decreases the maintenance interval for easy to replace spark plugs, that's a worthwhile trade-off. If it fouls sensors/controls and leads to ambiguous check engine codes, or premature engine failure - not good.
If it decreases the maintenance interval for easy to replace spark plugs, that's a worthwhile trade-off. If it fouls sensors/controls and leads to ambiguous check engine codes, or premature engine failure - not good.
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- 2021 CX-9 Sig
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- 2021 CX-5 GT
Well, if you watch the video linked in this thread, the reviewer never mentions any signs of the deactivation happening or any negative impact of the design. The thing has been in use in Europe and I don't think anybody has mentioned anything about it, right?
The latest Autogefhl video of the CX-5 2.5 (Soul Red) talks about the cylinder deactivation feature. He noticed no change in performance. His only negative was that he wished Mazda had incorporated a real time monitor in the instrument panel so the driver would know the status. Consider this is Thomas, he is very detailed oriented and driven.
State of Delaware route 113, speed limit 55. This ain't Texas where you can do mach 1. Fully loaded- 3 beach chairs, 4 suitcases, 2 coolers, 3 beach umbrellas, beach cart, couple of tents...Bah! Why am I explaining this to you? Wish I'd taken a snapshot of the mileage screen.
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