Hello again.

As somewhat of a follow-up to my first post, I have discovered what
may be the cause of my oil pressure problem.

It seems the correct filter is a Mann 920/17.  I was given a Mann 719/5.

I don't know anything about oil pressure.  Would an incorrect filter
cause the warning lamp to illuminate? What, in the design of the
filter, causes a variance like that?

Thanks,
Joe