> but in reality I still drive an 86 Olds Custom Cruiser wagon
> on 300-500 mile trips and never do anything but change the oil with 10/30
> Pennzoil.

Stan:

You're hoping nobody will notice, but there is the
secret of your old Detroit iron running and running:
10/30!  If you stuck with the original, cheap 30W, it
would be crushed by now....  ;-)  Remember when you
could get "recycled" oil--used oil that had been cleaned
and repackaged?  "Life was better with tailfins."  (TM)

                        Richard A Jones
                        Boulder, Colorado