6 miles may not be a warm up route even for a small car with a tiny engine, you'll see. Run a VERY good synthetic oil to keep it clean.

For your X5, if it's very well cared for & you are a member of the BMW CCA - then look at advertising it this way, particularly if you sort out the typical suspension wear items.

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2002 Euro X5 (E53) 3.0 diesel (M57)
5 speed manual with UUC short shifter.
Pre-xDrive NV125 transfer case (chain & gears).
Factory Xenon headlights, Spyder LED tail lights
Updated vortex crankcase breather.
Motorsport dead pedal, factory fire extinguisher, factory first aid kit, factory F&R mud flaps, factory PDC

Bilstein B6 shocks F&R
Redline oil has replaced "lifetime" fluids (F&R diff, manual transmission, transfer case and P/S).
Dimple magnetic drain plugs in all compartments.