Chevy Tri Five Forum banner
1 - 1 of 20 Posts
ZZ4

I have the ZZ4 motor in my 57. I. D. on the block will have ZZ in the code. G.M. does not recomend Syntec oil be used. My factory papper work recomends 10W30. My ZZ4 has 4500 miles on it. Hope that helps.
 
1 - 1 of 20 Posts