New report after 2 weeks of ownership:
I had thought the brake pressure warnings were the result of poor
electrical connections, but the warnings went away only momentarily
after cleaning the connectors. A replacement of the pressure switch has
kept the brake pressure warnling from returning for 4 days.
I replaced the (somewhat black) oil immediatly with dino oil, and after
2 weeks/300 miles, replaced the dino oil with Mobil 1, 0W-40. There is
some noticable grit/metal stuck in the filter, bot not a large amount.
I don't know if the previous owner used synthetic oil, as there appears
to be some sludge or varnish visible when the oil filler cap is off.
I have seen some comments about filling the oil filter cannister as
part of the oil change, to avoid low oil pressure at first startup. On
my 750iL, there is hardly any oil in the cannister when I replace the
filter, does that mean the anti drainback valve is leaking? The oil
pressure light took maybe 4-5 seconds to turn off after the oil change,
versus one second or less after a normal start. Does it make sense to
poor oil into the oil filter cannister after the filter change?
Any other maintenance which is recommended? The car did get regular
service, but is not mint, it seems like the Service Indicator board has
shot NiCad batteries, as shorting pins 7 and 19 did not reset the oil
change interval, how big job is it to take out the instrument cluster?