Zinc oil additives
I have a 2005 Cummings diesel that I use Rotela, 15 - 40, sense new (200,000 miles, now), I was wanting to use the same in my 69' 340 Dart, but was told (don't remember who) that it was not good for my flat tappet cam. I do add an additive, but would rather just use the Rotela for both. Any input?
