Do you burn much oil with this system? As I stated I owned a 1500 Silverado and GM is happy with burning 2 qts in an oil change. UNREAL to me, in fact the new models have changed the dipstick to increase initial oil volume.
My old 2013 5.3 Chevy with the fuel management system didn't hardly burn any oil, I'd say 1/4 quart max between 5000 mile oil changes running Mobil 1 which I started running from the 5000 mile mark.
At first I would say I didn't notice it going from 8 to 4 and back, but after owning it for 3 years I could always tell.
I'm sure it helps on fuel mileage, I just wish that there was a driver controlled switch to turn it on-off!