Quote:
Originally Posted by bwilson4web
Any vehicle that requires the engine to run at 30 mph, diesels, gas, or hybrids with little or no electric vehicle mode, will pay about 50% of their tank just turning over the engine. In contrast, a hybrid with significant electric vehicle mode gets a much improved efficiency, nearly double that of the other.
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I don't think that's strictly true. It mostly depends on engine displacement/gearing. Generally speaking most engines in the states are oversized compared to power requirements at 30mph, but for the world as a whole this isn't the case as much given the prevalence of 1L-1.5L engines along w/ suitable gearing that can allow vehicles w/ smaller engines to idle along in fifth/sixth at ~30mph in the ~300g/kWh region of the engine's BSFC map.