High zinc oil verses new oil with zinc additive

[vinb]

Good question on the ACCEL  from Wal-Mart.

 I have been using Mobil Delvac 1300 15/40 from Wal-Mart it is (CI-4 PLUS) rating..

Also Chevron Delo 15/40 & Motorcraft Super Duty 15/40 all are CI/CJ-4 Plus.

No cam or lifter problems....