altitude and octane
I just read this concerning driving a 2008 Honda efi petrol car in Peruvian Andes, but relevant anywhere high with a modern engine running on low-octane:
"... however at high elevations you can get away with lower octane than at sea level"
(ie: the crap 84 RON fuel in rural Peru worked OK at 4000m)
Does that make sense? Would lower octane petrol be improved by a richer mixture, or was their modern efi and lambda merely getting round it, just as a modern efi bike would do?
Will a modern bike run better at high altitude on low octane fuel than at low altitude on the same fuel? I would have thought mixture (rich at alt) is unrelated to octane (pre-ignition).
Chris S
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