5 months.
Yep, I agree. I normally wouldn't really push it like this, by far the longest ive ever gone on any oil. My Cruze with the turbo cooks oil by 7500 or so, sold it and had a Tesla for a while. Back to an ICE.
But anyway, a 4cyl doing 1800 RPM, slow accel,pure highway 75 miles at a...