I have the same problem, except the fact mine persists throughout the drive.
It'd been going on for ages and its so freaking annoying. I have used all types of oils and treatments and nothing works, i bought new lifters and have yet to have them installed. Yet my mechanic thinks it's injectors now, after i found out my last mechanic had not tightened my exhuast manifold, and the gasket perished...so half the ticking noise was that.
Solution: Buying a new head, and putting all the new shit in it outside of the current engine, and a simple replacement. Sick of trouble shooting feckin head issues, this noise has pissed me off. Almost pushed me to selling >.<
Good luck with yours, by the sounds of it you need some thicker oil dude. Lifter treatment thins the oil out more to unclog them, and i doubt thats your problem. Thicker oil and you'll be sweet.