I ran my B16 on 87 octane for the first week or two after I did my swap. It ran great, and I could do pretty hellacious burnouts in 1st. A few days ago, I filled it up with 93, and now it's got better response in midrange and the topend, but my launches got weird. I've got the power to launch, but it feels like it wants to choke when I first take off. Just for like a half second. I used to have this problem with the old D15, and with the V6 on my camry. They didn't like 93 octane. On 87 there was no choking problem. I'm wondering if the B16 likes 93 or just regular. Anyone have any similar experience?