at 6000 miles i switched to mobil one mx4t synthetic oil. at or around that point i've noticed that ticking noise that it seems like alot of people say they have has gotten ALOT loder. its not a hard knocking but more of a ticking sound. no matter what gear or what rpm im at i hear it. the higher the rpm's the faster the ticking is going. its so loud that i even hear it on the highway over my devil exhaust. just wondering if its my valves because my owners book says that the valves dont need adjusting until 26000 miles. if its not the valves does anyone know what this is or have the same sound?