David, thanks for the article. The correlation between AFM and quality oil is a big one, I would say even beyond that using the right type of oil. Youtube has a lot of content about disabling AFM and issues with oil consumption with AFM vehicles. But when queried about the type of oil used, the response I’ve received have stated that they’re using a conventional oil. Gm specifically states using dex-os 5W-30 in these engines which is an advanced synthetic oil. Not only does using this oil resolve burning/consumption issues, but my theory is it would probably take care of (or at least drastically prolong) the lifter issues with AFM engines.
It should be noted that many AFM problems are happening before the brand new vehicle is due for its first oil change (ask me how I know ugh) . But my question would be, if you have a problem even while using a plug in AFM disabler. If you unplug it before taking it to a dealer can they see evidence of its use? Because even though it would help and not hinder, it’s use could be enough for a dealer to not honor a warrantee due to using aftermarket products..
Honestly I know that using it at all may end the warranty but if a person wanted to take that chance, and I am not saying I would unless it gets that bad with recurring issues, how obvious would it’s use be to a service tech once it’s unplugged?
I have a 2012 Silverado with the AFM 5.3 engine. The truck has 50,400 miles on it. I recently changed spark plugs & wires to resolve a cracked spark plug issue. After changing spark plugs, I noticed the AFM somehow disabled itself with any outside help. It is staying in V8 mode all the time, and won’t switch at all.
David, thanks for the article. The correlation between AFM and quality oil is a big one, I would say even beyond that using the right type of oil. Youtube has a lot of content about disabling AFM and issues with oil consumption with AFM vehicles. But when queried about the type of oil used, the response I’ve received have stated that they’re using a conventional oil. Gm specifically states using dex-os 5W-30 in these engines which is an advanced synthetic oil. Not only does using this oil resolve burning/consumption issues, but my theory is it would probably take care of (or at least drastically prolong) the lifter issues with AFM engines.
It should be noted that many AFM problems are happening before the brand new vehicle is due for its first oil change (ask me how I know ugh) . But my question would be, if you have a problem even while using a plug in AFM disabler. If you unplug it before taking it to a dealer can they see evidence of its use? Because even though it would help and not hinder, it’s use could be enough for a dealer to not honor a warrantee due to using aftermarket products..
Honestly I know that using it at all may end the warranty but if a person wanted to take that chance, and I am not saying I would unless it gets that bad with recurring issues, how obvious would it’s use be to a service tech once it’s unplugged?
I have a 2012 Silverado with the AFM 5.3 engine. The truck has 50,400 miles on it. I recently changed spark plugs & wires to resolve a cracked spark plug issue. After changing spark plugs, I noticed the AFM somehow disabled itself with any outside help. It is staying in V8 mode all the time, and won’t switch at all.
Good article. I tried disconnecting the brake vacuum sensor but that causes the anti lock brakes to activate at slow speed stops.