Ok, here are the details, I have a 99 F355 with 11,543 miles on the clock and up to today I have never had a single issue with it. I took the car out this evening and went for a quick 10 minute drive, parked the car for an hour and then started the car as usual when I noticed a puff of smoke out of the exhaust. Concerned, I jumped out of the car and it was just a quick burst of smoke that smelled like oil and was white. Never happened prior and hasn't happened the last three times I have driven the car. Do I have a reason to be concerned or is this just a random event? My first thought was the valve guides but I thought that was resolved in 97.