Ok here goes I changed the motor oil on my 2006 dodge Dakota srt v8 4.7l.I used the specified amount 6 quarts of 5w-30 and oil filter. I used mobile 1 full synthetic.After cranking the engine I began to hear this strange ticking sound at idle . I allowed the truck to run for 5 more minutes.I let it sit over night and the next morning sound still there. I then soon changed the oil that day to conventional valvoline 5w-30. Still that sound is there. I took it to autozone and had a guy run a diagonistic test and it came up that there is no trouble codes.he said he couldn' hear the sound but I can and it's not in my imagination LOl.it's seems loudest when cold and at idle. You can't hear the sound so well when at high rpms. The sound is like a faint ticking, like the sound when a belt is sort of loose but it's not that. The truck only has 36166 miles. I was a little late on the oil change 166 miles back but I don't think that this would cause the problem.you can hear the ticking when under the truck next to oil pan. Also I noticed that on the left bottom side of the oil pan that there seems to be unsmoothness kind of wavy like while the other side is smooth.this must mean spun bearing right?Furthermore would the change to synthetic cause these problems?I seem to have noticed some power lose.With all this what do you seem to make of it?I know most likely it is a dirty lifter or spun bearing or maybe i am wrong?If it is any of the 2 what should i doThis is my third question on this website and thank you for all yalls advice I really appreciate it.