Poll: Synthetic/Conventional/Blend

Shell Full Synthetic in my wife's 07 300 w/3.5, because it seems to use less oil with that than other synthetics including Mobil 1.

Mobil 1 in 02 Durango because that's what I started with when I switched to synthetic in it a few years ago. 109k and never uses a drop between changes.

Used Z-Alt in the 74 Duster before I sold it.

Not sure what I will use in the 440 when it is finished, but at this point, i am more concerned about what modern gasoline will do to it than oil. There seem to be some good choices for oil out there.

BTW, I have become less OCD about oil than I used to be. I have had only one engine failure in all my years of driving and that was in a stinking 89 Chevy G20 van with a 350 which I religiously changed the oil in. So much for the "indestructible" chevy small block. (Bought that new too).