<< The Answer is yes, but only if you have fuel getting into the oil from
leaky fuel injectors...>>

   Not so fast.  Oil viscosity can also break down over time, and my old
boxer was living proof that Castrol 20W50 is probably closer to
?W-inadequate when you try and push it beyond the recommended severe
service 3,000 mile oil change interval.  As you know, that damn buzzer
sure gets your attention!  When it happens a few thousand miles from
home, the first thing you think about is whether you've paid your AAA
dues.

   A switch to synthetic worked for me, since my Westy is used mostly as
a long hauler, and stops for routine service that I'd rather perform at
home myself  are a PITA.  Now, at around 8,000 miles, I start to *think*
about changing it. <G>

       George/ATL
      '89 WesTiico, Wernher