[mpg_numbers_guy]

Yes, lowest RPM at wide open throttle is most efficient for acceleration too, but for most people that is just dogged slow, and only offers a slight efficiency advantage to peak BSFC acceleration. I tend to view the peak BSFC on my Insight (~2000 RPM) as the RPM I try not to exceed while accelerating. It's hard when the car has only 66 hp factory, but the mpgs are there. I surmise it would be the same with your Corolla, except that acceleration would be a bit faster due to your greater power. But for those who want to drive "normally" without nearly lugging the engine, peak BSFC is a pretty good compromise.

Peak BSFC also only works if you are at wide open throttle before enrichment. Usually this is around 75%-90% load, depending on the car. Anything past 90% and most cars start richening the fuel mixture, which reduces mpgs. A Scangauge is a great tool to have, but a bit pricey. The Torque Lite app (free) and a cheap bluetooth OBDII dongle ($10-$25) can show load and other parameters. The only downside to Torque is very inaccurate fuel economy readings compared to a Scangauge, but that doesn't matter since the Corolla already has fuel economy instrumentation.