189,695 miles on my X5. It was -15C this morning. It had warmed up to -13.5C by the time I got to my destination.

At −15 °C ambient my M57 shows DPF ΔP ~0–0.02 psi at cold idle, ~0.04–0.06 psi at ~78 °C idle, ~0.40–0.45 psi at 45 mph (~80 °C), and ~0.68–0.75 psi at 60 mph. Converted that’s ~0–1.4 mbar idle cold, ~3–4 mbar idle warm, ~28–31 mbar at 45 mph, and ~47–52 mbar at 60 mph. The values scale with exhaust flow as expected and are within typical healthy ranges, and regens complete normally with coolant rising into the low-90s °C.

I see no reason to change anything I'm doing.

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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim