I am on my 4th Hemi, the little one, 2 5.7's, and now a 6.4. Mine was purchased with 71,000 and now have 103,000 just over a year. No tick, no knocks, just really noisy at idle, hot or cold. I started using TC-W3 about 5000 miles ago.1 oz to 5 gallons. My motor is dead quiet. I can hear the...