Do you know what kind of assembly lube was used to put it together? Some of those products have metallic-looking components, like the Never-Seez I use for lubricating head bolts, main bearing bolts, etc. If it's not making any expensive noises and the oil pressure is good, don't sweat it!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!