What level of zinc should I be looking for in my oil? I had occurred to me that I didn't consider this when changing my oil (duh!). I usually use standard Mobile 1 10W-30.
Zinc is 900 ppm, phosphorus is 800 ppm.
Should I add a zinc additive or is 900 OK? Is the weight OK or should I use a different weight? It's about time to change it again so I'm just looking for the best off-the-shelf oil to get for it. Something I can easily get at an autoparts store.
