I went out this evening to go for a drive and when I started the engine it made one hell of a racket for 1-2 seconds. I just reached for the key to shut it down,cause my first thought is that it was going to seize and then it was fine. Obviously didn't have any oil on the bearings and such upon startup. It had only been sitting since last evening. I have never had this happen with any motor before. I have 550 miles on the motor. Any thoughts?