Yep, me too. I use 93 octane as I think the absolute best performance can be obtained from premium. I also try and use "Top Tier" fuels. Gas is purchased by the oil companies on an open market. Refining and the additives are what make gasoline "better". I am also a big believer in adding "Techron", a fuel additive, about every six months, whether I need it or not. Good stuff. It can be purchased at Chevron stations, automotive supply store like "Advance Auto", or Walmart.
http://www.toptiergas.com/
http://www.chevron.com/products/prod...ls/techrongas/
http://www.chevron.com/products/prod...techback.shtml
I try to get to a Chevron station, but will use Mobil or BP(Amoco). The Z seems to perform very nicely on Amoco.
Welcome to the forum, BTW!!
...................Tom
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Cor·vette : [ kôr-vt ]n. 1. A fast, lightly armed warship, smaller than a destroyer, often armed for antisubmarine operations.