Well, a flooded lead-acid batt is designed to run for many hours, but I don't think anyone would call it high performance (relative to other battery chemistries).
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Today's fuel consumption: 26 mpg (US). You read that right.
Ironically, that abysmal number is the result of the car's emissions test, running up and down on the dyno a bunch of times, and from idling while they were doing their thing.
The only day I had worse FE was when a vacuum line split, and the engine stuck in open loop.
OK, I'll admit I had a big part in the lousy numbers: I drove it super-inefficiently on the way to the garage, because it's only a couple of km away, and I needed to make sure it was hot for the test. So, I went in 2nd gear, at high rpm, with my left foot on the brake the whole way there. It was good and hot when I arrived, but my mileage was in the 30's.
Pulled off an even 100 mpg (US) on the way home (hot car, dry roads = easy to do), but even that couldn't salvage the day!
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