zinc or not necessary

[mjwebb]

turns out my engine was just rebuilt with hydraulic lifters, roller rockers, etc. so since it's no longer a flat tappet motor can I use any new oil, 10W 40?

[firefighter3931]

turns out my engine was just rebuilt with hydraulic lifters, roller rockers, etc. so since it's no longer a flat tappet motor can I use any new oil, 10W 40?

Are you sure ?  Hydraulic lifters are available as both a flat tappet and roller design. 


Ron

[Ghoste]

Roller rockers are not the same as roller lifters, I would bet the same as Firefighter and that you still have flat tappet lifters.

[mjwebb]

ok, thanks....I guess I'll just play it safe and run the Rotella 15W 40 since it is safe for either or

[Ghoste]

The Rotella formulation has changed, you're pretty much stuck with using an aftermarket zinc additive.
A long thread but stickied for a reason, this is a good read on zinc levels and oil;

http://www.dodgecharger.com/forum/index.php/topic,46015.0.html