False. Any ENGINE oil must have zinc in it. It’s the level of zinc that changes.
Again, an engine oil that is formulated for Diesel engines isn’t good for a gas burning engines. They use more detergents, different detergents and other additives that affect almost every facet the oil must meet.
You (not you particularly but anyone wanting to know) can spend a day on the web looking at a multitude of webinars and such on oils, oil formulation, lubrication, tribology and a host of other oil related topics can find this information.
We have long since passed the day when engine oils are mass market junk. We have a multitude of quality oils to choose from, to the point that there is no reason to run on the shelf oil.
I’m still baffled that guys will spend money like water on their engines and then throw Walmart or some other cheap assed oil at it.
Hopefully by the end of the year I’ll be able to test oils. The data will be mine, so I’ll be able to publish the results. It should open some eyes as to how garbage some of these oils really are.