Need help to solve my car problem

#1
My Toyota 2002 LE short oil and smokes white when it's cold and black when hot. What can I do. This started after change of oil to XHP Mobil oil in nigeria
 
#2
How much smoke are you talking about? Thin white smoke may just be some condensation, which is perfectly normal.

Black smoke means you are running rich.

XHP oil seems to be a bit too thick. Switch to something with 5W-30 or 10W-30 viscosity.
 
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