Fleet sales manager at dealer says they expect 40% range reduction at 70 mph + , Is that possible?

[bpost]

I agree. You'll have to exceed speeds of 80mph or have 10mph+ headwind to experience significant loss of range.

I had a Model X from 2016-19 and that was not my experience. Any highway speeds greatly reduce range, at least back then. Perhaps not by 40% but definitely more than 20%.

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