05 SanteFe - ticking sound in engine on startup. has 5w20 Synthetic engine oil in it, always has. Sounds like a lifter, and goes away when its warmed up. More noticable after sitting for > 8 hours. Client is using gasohol; switching to unleaded, as I thought it might be an injector. I listened with a scope, and its coming from center of engine - aroun valvecover and intake area. Anyone know of problems or suggestions? Please email [email][/email]