I posted my OCI in the long thread, but my main question here is what I should do to mitigate fuel. With only 2700 miles/6mo on the oil, the oil was pitch black which I understand since this is the 2nd OCI from buying used (car was dealer mainted with bulk conventional, for 5-7k OCI, not ideal). However, the oil smelled like a gas can. I've never experienced something like this so it was quite concerning. I'm planning on sticking to max 6 mo/5k due to my severe usage. but should I consider running higher octane as well? I've been using 87 lately due to the higher prices in CA. I've used 91 and 89 before, and there is a slight power bump but wondering if its worth it to decrease fuel. I'm already running 5w30, so I don't want to go thicker due to lifetime warranty on these engines.