I use Penzoil Platinum full synth 5w 30 religiously in my 2017 Fiesta ST.
One of my 5 quart jugs sprung a small leak at the very bottom. I was was able to catch it in time and thus not much was lost. But the thing that I now ponder, is if the additive pack is now mostly gone, due to the leak being on the bottom, where most of the "good stuff" collects.
What I mean is, I have always noticed on my fresh bottles, there's that darker looking sediment that collects at the very bottom, which I always took for the additive packs settling; that need to be mixed (bottle vigorously shaken) before use.
I would hate to have to throw out 4.5ish (what didn't leak out) quarts of perfectly good oil.... but at the same time, is it still good without the settled darker part?.... Thanks in advance.