This is what I bought at Advance Auto Parts which I didn't know we had here in Janesville. But I found it in the yellow pages. Plus it's only 5 minutes from my house/shop. Here is a picture of it. I hope this is what you mean by Pennzoil Air Cooled. I am planning on using premium gasoline at a little over 93 octane. Is this OK and do I need to watch out for any additives in the gas?

Barry