Originally Posted by HKYStormFront

ok, i'm gonna throw my two cents in on this one. first of all, i realize we have similar but different motors. i started changing my oil after the first 3k miles with mobil 1 synthetic 5w30. i usually changed it every 5k afterwards give or take. due to my trip to ZCON this year in the truck i stretched it a little further and ended up changing my oil right at 60k the last time (right after i got back from Tx), again with mobil 1. recently though, my engine has gotten very rough running. on the cold mornings that i've been getting up for work (below 30*) it has made loud (i can only describe it as) "piston slapping" noises. i became very concerned about it so i called the dealership here in anderson, who i've never had dealings with since i just moved down here in december. long story short they said to bring it in and they would drive it to see if they could come to any conclusions based on the sounds it was making. i was due for a oil change tho because i was at 65k miles now. i took it in this past friday evening and they drove it on saturday morning (go figure it'd be warmer that morning that the entire month of dec and jan so far lol). they couldn't hear anything abnormal. i let them go ahead and just use their regular mobil oil (non-synthetic) and let them do the oil change. i immediately noticed a VAST improvement in NVH and start up noises, even when cold.

long story short: just get the oil changed at the dealership, they will have records of it in case anything happens. the oil they use is spec'd out to work with your engine. they didn't charge me much at all.