Modern oil does not adequately lubricate a flat tappet cam *No zinc, I use Rottella in all my flat tappet engines. Yes it has less zinc than it did, but it still has plenty.


Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451