1998 Mitsubishi Lancer Evolution Hi Recently Had Ticking Noise 4g63 Engine Did

Hi, i have recently had a ticking noise in my 4g63 engine i did an oil change and used slightly thinner oil 10w-50w fully synthetic to maybe try stop the issue. it half worked the ticking comes and goes sometimes its there during cold starts and occasionally not, just comes and goes now again generally more after a burst of higher rpm. Not sure what i should do other than spending the $ id sooner be able to do it myself any sugestions?
Thanks