Pulled the dipstick today (van has been sitting for 3 days) and saw the
bottom 1/8" was definitely a different colour - light brown.  Wiped off the
stick and inserted again - same thing.

This colour doesn't show up if the engine is running - implying some gunk
on the bottom of the oil tank?  Oil was changed 2000 km. ago, and a litre
added recently.

Any ideas?

Steven Heller
Toronto, Canada