Today got the "new" van --

was blowing white bluish smoke through the exhaust

an oil change
plugs
cap rotor
so far 

wires looked fairly new..

sprayed the throttle body spring etc. etc.and loosened up the linkage
springs..

also dumped in two gals of high octane gas into
a qtr tank of gas -unknown origin..as well as 2 bottles of gas drier.

smoking less but still smoking..
idles ok

where should I start--

Thx
Steve
85 GL