Hi all,
     My Dad still has a 2.1 in his 87' Westy and he wants to know what grade
of oil to use.  So I tell him 20-50wt.  He tells me that according to the
Bentley manual 20-50wt does not cover our temperature range, seems to top out
at about 100 F.  We live in the Inland Empire of Southern California with
summer temps of 60 F as a low to 115 F as a high.  The chart would seem to
show that straight 40 wt is the correct oil but 40 wt only goes to a low of
70 F.  So what are you guys using in hot climates?
Thanks,
Kevin