Ticking noise in engine 200.000 miles always had oil changed 3000 miles or less sometimes sounds like a knock but when I put stethoscope near the area of lifters I hear light tick at number 3 little louder on 4 and louder on 5 and more on 6 pulled valve cover and all rockers had tip of rocker arms were full on oil the last rocker on 6 had very little and the pushrods had more grunge on number 6 then any other cylinders could this noise be sticky gummy lifter hangin up ?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic