Puff of white smoke coming from exhaust upon startup...should I worry???

Don't sweat it NFS4, absolutely normal, it's condensation.

 

[SuperTool]

It's probably the sludge burning

 

[Bulk Beef]

Originally posted by: DorkBoy

Originally posted by: Amused

Originally posted by: JustinSampson
Just oil leaking because your valves are wearing a bit and letting oil drip onto the piston when it sits for a while. Normal for an old car.

Um, white smoke is not oil, it's water. And it's fine as water condenses overtime inside your engine and exhaust system.

Oil burning is gray/black smoke.

Yes, glad to see someone else knows the basics

Actually, black is fuel (too rich). Oil is bluish white, water will be steam and probably not real thick, and if your head gasket is blown bad enough, coolant will be a thick cloud of white.