[arpad_m]

Originally Posted by thegraham77

Ok...if this is a stupid question please let me know, after you guys answer it of course ��. 2019 a10 ZLE-do I have AFM or no? I have never felt it and really haven’t found a straight answer. Maybe it just switches that good that I don’t notice?

It should be disabled on your car. You can double-check this yourself by flipping to one of the mpg info pages in the gauge cluster that displays a gray V8 icon: if it ever turns into a green V4 icon when cruising in high gear, that's AFM kicking in. But again, as far as I know, AFM is not enabled on A10 ZL1s.

[thegraham77]

Originally Posted by arpad_m

It should be disabled on your car. You can double-check this yourself by flipping to one of the mpg info pages in the gauge cluster that displays a gray V8 icon: if it ever turns into a green V4 icon when cruising in high gear, that's AFM kicking in. But again, as far as I know, AFM is not enabled on A10 ZL1s.

Ok awesome. Thanks. I’ve never seen a V4 icon. Come to think of it, I don’t ever remember seeing a V8 icon either.

[Bruiser SS]

AFM has been great on my 2020 A10 2SS. Doesn't make much of a noticeable transition at all. It was more noticeable after exhaust but still nothing bad.

[lt4camaro]

AFM is annoying to any of us with a sensitive butt meter and a sharp ear. I can feel it, hear it all the time, constantly taping on the gas pedal in slow traffic to knock it out. When its engaged in slow traffic, the up shifts are not nice and crisp, the automatic down shift when the car slows down is different etc etc. Just give me a switch to turn it off and I will be happy. Mechanically its altering the way the lifters normally work and it makes the converter do extra work. The less any mechanical or electrical component does, the longer it will last. Certainly not worth the 1 or 2 MPG gain.

[shoe5163]

Or econo mode with 4 all the time.

[arpad_m]

Originally Posted by thegraham77

Ok awesome. Thanks. I’ve never seen a V4 icon. Come to think of it, I don’t ever remember seeing a V8 icon either.

Just for the record, it looked like this in the pre-refresh cluster, I don't think GM changed it that much in 2019 cars (and yes, it's black on green, the photo isn't exactly color accurate):

[ItsChristianInHD]

Originally Posted by arpad_m

Some of us simply don't trust AFM as a technology:
- it's hardwired to the same 4 cylinders, which may impact wear uniformity;
- switching between V8/V6 and V4 modes is done via valves that can creak or whine;
- the A8 (8L45 and 8L90) trans is tuned differently in DoD (AFM enabled) mode, allowing much more torque converter slip that then triggered the shudder issue much sooner and more readily for many

All these risks for a 1-1.5 mpg gain. The successor to this technology, DFM is more advanced, but the Camaro did not receive it, and you know how it is with complexity in general, the higher it gets for a component, the more prone it is to fail.

I heard about that being the case with number one.
Never heard of example number two you provided. I really need to get a range device.

[GroundhogSS]

I've been using the Range device since they got the software to where it didn't throw codes. Originally I got TCM codes and sometimes very rough shifts (A8). Cruising on the highway it still gets in the 20's. Better than my G35 coupe ever did.

[UnknownJinX]

Being an M6, mine doesn't have the software to enable the AFM.

In my C7 M7, I have tried it and I didn't mind it. With C7, if you have M7 then it will only engage in Eco mode. The only way I was able to tell is with the indicator and the subtle variation of vibration in the shifter. Otherwise, it's very smooth.

Personally, I wish Camaro M6 is programmed like C7. My daily driving won't see much benefit from AFM but for the long highway trips, it could help. For people who don't like it, don't turn it to Eco mode and it will never bother you.

As for oil consumption, if it's anything like Honda's VCM troubles, then it's probably due to the slow leakage of gas from the disabled cylinders, which over time can create a vacuum in the cylinder and it will start sucking in oil. I have heard GM combats this issue now by having a combustion event happen once in a while in the disabled cylinder just so that the cylinder pressure stays up.

[arpad_m]

Originally Posted by ItsChristianInHD

I heard about that being the case with number one.
Never heard of example number two you provided. I really need to get a range device.

I'll have to clarify my sloppy wording there, there is a second set of valves (in addition to the exhaust control valves) under the car that are flipped when AFM engages V4 mode in order to mitigate unwanted sounds. So these don't perform the AFM function per se, they're intended to address a side effect.

[Bumbleboy92]

Originally Posted by arpad_m

I'll have to clarify my sloppy wording there, there is a second set of valves (in addition to the exhaust control valves) under the car that are flipped when AFM engages V4 mode in order to mitigate unwanted sounds. So these don't perform the AFM function per se, they're intended to address a side effect.

Those valves are interesting, I always thought they were to maintain a good sound from the exhaust but on the v6 those valves are just spring controlled rather then electronically controlled like NPP.

[Soon2be 21SS]

So are you saying then that, for instance in a 2021 A10 Camaro, if you have it in sport mode it will not initiate AFM at all?

[UnknownJinX]

Originally Posted by Soon2be 21SS

So are you saying then that, for instance in a 2021 A10 Camaro, if you have it in sport mode it will not initiate AFM at all?

Technically it can kick in in all modes if the conditions are right.

[Seniorrs]

Scotty Kilmer says deactivated cylinders wear more because of lack of lubrication.Same cylinders deactivate all time.I don't have to worry about that or remote start with manual.But I think I would deactivate if I had auto.
I think it helps sales.