Okay, I just changed the oil on my new '84 vanagon for the first time last
week, and, without even thinking about it, put 10w30 oil in it (I'm used
to putting oil in eurovans).  Now, reading the list archives, I see a
bunch of people are running stuff as thick as 20w50!  But my light/buzzer
haven't come on yet or anything, so is it worth me changing it out?  If
its bad for the engine at all, I'll definitely swap it out, so my question
is just whether or not it is possible for this to have any adverse
effects.  Keep in mind, winter is on its way here in chicago, and we'll
likely see 20 (or more!) below.  Of course, I can always do another oil
change before than if that's what's best for the van... right now
(literally...at 12:49am) its 57degrees, and our temp range for these next
weekds looks to between 40 and 70.

Thanks guys,
wes