"Scott Lowrey" wrote in message
news:xGEic.24898$IW1.1210282@attbi_s52...
[...]
Later, I grabbed a pint out of the box in the office and it said "50W"
but also had a "100" above that. I see why he made the mistake. Or did
he? I dug around on the AeroShell web site and found products labeled
similary:

OIL W 100 SAE 50 - ASHLESS DISPERSANT

Just to clarify beyond George's answer...

The oil you looked at was NOT multi-weight. It simply had both kinds of
units printed on the bottle. Like your soda bottle showing fluid ounces and
liters. It happens that the two measurements are exactly different by a
factor of 2, making conversion easy.

Pete