If you have a 7-speed manual transmission just keep it out of the Economy setting. Personally I don’t know why any would use it! If you’re doing a freeway type trip and want to save a few bucks on gas use the 7th speed gear.
If you have to use the Economy setting you bought the wrong car!
Hope this helps.
If you have an automatic I’m not sure how you can keep it from automatically going into that setting.
chris

 

I have a 2017 Z06 manual. Mine does not go into 4 Cylinder Mode unless I switch the driving mode to "ECO". Since I never use that mode, I never engage AFM. I have seen instances online where it did damage a cylinder, but GM replaced it for free. And, I have seen users who use it regularly, and never have an issue.

 

 

I believe this mode only exists for GM to meet the CAFE requirements.
Again, why would anyone purchase a C7 to drive in 4 cylinder mode.
If so, once again, you bought the wrong vehicle!
Happy Trails, Chris

 

AFM is used across many of GMs V8 and V6 engines. In general, it is not a bad idea to save fuel for most driving styles. One of the things that damages it is the use of dirty oil or the wrong viscosity oil. AFM uses special lifters and a controller to deactivate some cylinders. On my 2016 Z06 I have it locked out. I replaced the lifters, cam, cam cover, and cam drive. It can be deactivated much simpler with a small unit added to the engine front or a controller plugged in. But just deactivating it would not necessarily stop the failure of the lifters or cam if that is your concern.

I think AFM gets blamed for a lot of failures. A bad lifter batch or poor cams, or bad springs could look like it was caused by the AFM when it is just bad parts.

just some thoughts

 

Have you ever driven in Eco mode vs Touring and compared the mpg? I tried it on a trip and found that Eco improved the gas mileage by a whopping 1 mpg!

 

I noticed a rapid increase in mpg using ECO over SPORT.

 

Yeah, it's not that noticeable.