I bought a 1994 Mazda 626 about 3 months ago.  I never saw any smoke until I
had the oil changed last week.  Now when you start it after it has been
sitting for several hours it emits white smoke.  It is very noticiable the
first time you start it in the morning.  The smoke stops after about a minute
and you dont see it again until the cars sits for awhile.  I do not see any
leaks and all the fluid levels are good.  What should I check or do to try to
figure out what the problem is?