When I went to buy a new oil pressure switch, the parts guy only had 1.8 bar
switches available from his regular vendor.  All my references call for a 0.9
bar setpoint and that is what was used in my '90 Syncro.  I noticed some
sources offer both the 0.9 bar and the 1.8 versions.  Was there a production
change or is it a matter of personal preference?  After all, by the time an
engine is showing only 0.9 bar oil pressure off idle, it is pretty much dead.

Rich