I have an 03 Accord with the K24 and its infamous cam galling on the exhaust lobes. Its been tapping forever, currently has 220K and rising as I drive about 100mi/day. The valves were adjusted about 6 mos ago, but it just keeps getting louder. I dont intend to fix this problem as the car is worth $2k tops, BUT Id like to quiet it down if possible. I currently, as always, run Valvoline synthetic 5w20. Since its a VTEC, I dont think its wise to just dump a bottle of Lucas in it and cross my fingers. The car still runs perfect, no misfire codes, no power loss, just an annoying tap. What viscosity could I run that may quiet it a little while not risking side effects? Thank you, any and all on-topic input is appreciated!