cruisin at about 80 noticed white smoke behind car on 2002 Saab 9-5

on ivestigation not from exhaust but of large amount of oil on engine,no warning light,still oil in engine ,just had major service,any ideas?

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4 answers 2 comments
Don't drive it . Check trans fluid and coolant....again.
Did not know Saab would go that fast. Check for leaking oil filter,drain plug ect.
If this just happened after service take it back and get it checked.
Believe it or not...SAAB made aeroplanes
Should have kept it up!
possibly oil spill by lube tech
Check oil pressure sensor too for leak.