Hello.
Steam looking or white smoke exhaust is (99.99% of time) coolant vapor.
For me, if this persisted longer than 10 - 15 minutes of running the motor after each cold start, investigating leakage would be in order....also being mindful that there'll always be some condensation from the day before, since gasoline does contain some water.
A quick curbside test for raising or lowering your gut feeling as to whether there's oil in there: Hold your hand in the exhaust stream; then repeatedly run two fingers against each other and feel the amount of loss of viscosity.
Also This may be interesting for you:
Water (white smoke) coming out of the exhaust system...
For variety of conjugations on white smoke in exhaust
WikiAnswers - What can cause white smoke from the exhaust