GM 5.3 AFM just started consuming oil ~30k miles. Need to run a few short OCIs with a high detergent oil to clean ring packs and also disabling AFM as we speak. What's the consensus on the most aggressive cleaning oil available? AMSOIL Signature Series, Pennzoil Ultra Platinum, Mobil 1 Annual Protection, Mobil 1 Extended Performance? Has to be available in 0w-20 flavor.
Thanks.
Thanks.