Hey everyone, Over the weekend I was given 2 cases of Valvoline 5w-30 that had been sitting in my neighbors garage since sometime in 05. The date stamped on the box was 1/1/05. Is it OK to use? It is SM/SL rated. Cracked one of the bottles open and it looked fine, no settled particles etc. I'd hate to see all this oil go to waste, this is enough for 6 oil changes on my car!