Would you mind sharing how much you paid for it? I'm currently shopping for one and have noticed the dealers are starting to lower their prices on the 2017s.
CX-5 Cylinder deactivation
- Thread starter sjbraun55
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Would you mind sharing how much you paid for it? I'm currently shopping for one and have noticed the dealers are starting to lower their prices on the 2017s.
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- 2022 2.5GT
I've seen that before. Very informative
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- Plano, Texas, USA
Nothing special on cylinder deactivation from Mazda based on the video. It doesnt address any potential problems inherited from cylinder deactivation found by many other car manufactures who had tried and failed.
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- State of Jefferson
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- 2017 CX-5 GT AWD+
Well done! A good choice at a great price.
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- State of Jefferson
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- 2017 CX-5 GT AWD+
I've never seen pistons like that. Is that specific to Mazda?
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- Plano, Texas, USA
Yeah that piston design is unique to SkyActiv-G petro engines to handle high compression ratio. The second part of video has nothing to do with cylinder deactivation.
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- 2022 2.5GT
How do you know it doesn’t?
Is cylinder deactivation coming there Anchorman (uhm)
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- Plano, Texas, USA
Well, anybody who has concerns on longevity of cylinder deactivation would get a 2017 CX-5 like the OP did. Others like me who has a plan getting a 2018 CX-5 now may change their mind finding other suitable alternatives.
Personally Id settle for a vehicle with turbo or CVT, but not cylinder deactivation as it has minimum gain on fuel economy but many deficiencies which cant be overcome. Turbo and CVT are excellent in theory, and they can be made more reliable and better on performance. On the other hand, I just dont see how those deficiencies on cylinder deactivation can be fixed.
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- Plano, Texas, USA
Mazda only implements cylinder deactivation on SA-G 2.5L as it has balance shaft to help smoothing out the vibration issue while only 2 cylinders activated. SA-G 2.0L doesnt have balance shaft, hence no cylinder deactivation.
The video and all other materials Ive seen from Mazda don't say anything to address known issues on cylinder deactivation other than added a fulcrum inside the transmission to fight vibration.
Like you, I'm skeptical that they've come up with a breakthrough to prevent the problem outright. Every engine has the fundamental need to lubricate the interface between the cylinder bore and rings with oil, which is always going to lead to some oil accumulation in a deactivated cylinder.
My guess is they think they can manage it. One simple thought I had is that while running under the conditions suitable for cylinder deactivation, you could periodically re-activate the cylinders to burn off the oil before the oil film gets thick enough to form glazing or deposits. You might have to work pretty hard to make that unnoticeable by the driver though.
Even if they can't eliminate the problem, maybe they can push the onset of the symptoms further out. If it takes 5 years to show up, and only a minority of owners with certain driving habits are affected, the financial and reputational risk is probably small.
My guess is they think they can manage it. One simple thought I had is that while running under the conditions suitable for cylinder deactivation, you could periodically re-activate the cylinders to burn off the oil before the oil film gets thick enough to form glazing or deposits. You might have to work pretty hard to make that unnoticeable by the driver though.
Even if they can't eliminate the problem, maybe they can push the onset of the symptoms further out. If it takes 5 years to show up, and only a minority of owners with certain driving habits are affected, the financial and reputational risk is probably small.
I think Red MC has nailed it. Push the problem-free operation past the power train warranty, and you're golden. Beats me what is the underlying reason though. There always will be an option to de-activate this feature, which will mitigate the adverse consequences. But there's no fun de-activating the feature you paid for...
They should drop that and add the 2.5
If this technology is so bad then it should have been abandoned long ago yet GM is still using it today after all the issues and law suits they incurred in the past. Could be that they have now solved the issues and Mazda have found the solutions as well.
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And this is the point. Only minority users with certain driving habits usually get affected. The vast majority of owners after 5 years should have no issues with normal driving if they also serviced it by following the correct schedule.
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