RE: New Oils in Old Engines
Jim makes an interesting and good point about the additives in current
engine oils.  In a discussion with the shop lead at a highly respected VW
engine rebuilder here in the NW this very subject came up and he made to
same point for the same reason.  Our VW engines were engineered 20+ years
ago and the oils formulated at the same time were for engines of that era.
Not so with the oils on the shelf today.  I felt a little better when he
stated that the Mobil One synthetic I use in my 21.L WBX is one exception in
the off the shelf synthetic stuff.  So Jim is not alone in his observations,
others that see the innards of such engines on a daily basis are of the same
opinion.