sending unit bad
Folks,

I have a 1995 XJ6 with about 100K miles on it.  It runs well and has
been serviced regularly by an experienced Jaguar mechanic.

Very occasionally – every 100 miles or so – the oil light comes on for
a second or two.  Then it goes off not to return.  The oil pressure
gauge remains constant.  This has happened after a cold start and,
less frequently, for a second on the highway despite the car being
warm.

As directed by my mechanic, I switched from 10W30 grade oil to 10W40
but it still happens very occasionally.  Ideas?

Thanks very much!

luch