At 12:38 AM 6/4/2011, Don Hanson wrote:
>   You can get better oil pressure with heavier oil.  20-50 will get you
>through the summer or till you decide to fix the motor or something else.

15W40, 15W50, 20W40, 20W50 are all specified for temps up to
90+.  For temps over 100F the spec is straight SAE 40.  Page 85 in
the owner's manual for '89.  Incidentally 20W50 is specified down to
10F and SAE 40 down to 70F.

These are standard specs for new engines, not counsels of
despair.  These engines need heavy oil.

Yours,
DAvid