If they are mechanical lifters, then there is an adjustment under the valve cover. If they are hydraulic then there is no adjustment, and while a different weight motor oil or special additive may help the ticking there is not real way to stop it.
Possible lifters that are bad that could explain your ticking noise. It should cost you nothing by stopping by an Auto repair shop and have them listen to your engine.
lifters
well it sounds like your lifters are ticking The connecting rods screaming LET ME OUT!!!
More than likely it's the lifters.
have your valves adjusted adjust your valves
Lifters ticking.
It has both.
lifters are normally quiet in operation check oil level if fine check oil pressure if ok could be wear on cam and lifters if so replace
only way to stop lifters from ticking is to replace the lifter. ticking or noise from lifters is caused by parts being worn most times whenthis happens the nlobe on the cam that the worn lifter is on, is also worn,so you have to decide if it is worth paying for both to be replaced
Dodge Rams are known for their ticking due to "noisy lifters". This problem has been ID'd by some individuals as Dodge's use of cheap Chinese made lifters for their 5.7s. To get rid of this you would actually need to replace the lifters with after market lifters. Now if you're referring to a tapping+fluttering sound when you accelerate then you will most likely need to check on your valves.
In most cases, you can tell that your lifters are bad, in your car engine, by the ticking noise. A bad lifter will make a tapping sound.
?? Lifters not getting enough oil ??