zinc oil useage?

I use the Oreilly brand 10w30. It's made by Valvoline. I also use Rislone ZDDP additive. I mix it together in a five gallon bucket before I dump it in. It's what I can afford so it's what I use.
Bur...O Reilly's computer says it does not fit my car!!!!!!! :thumbsup: :BangHead: :BangHead: :poke: