We Roadster owners have all sorts of general rules for figuring out where we can get to on a single charge. Drive at XX speed and you need 1.X times the route miles in Ideal Miles, or each X feet of elevation costs you Y IM (Ideal Miles), etc. What we don't have is a database of actual drives and actual Ideal Miles consumed. I'd like to get us started along that path. Here's a start: Monterey <-> San Luis Obispo via Hwy 1 (thru Big Sur) is 135 Actual Miles Southward in 199 minutes consumed 157 Ideal Miles (IM) Northward in 184 minutes consumed 165 IM San Luis Obispo <-> Northern Santa Barbara via Chumash pass is 94 miles Southward in 102 minutes consumed 123 IM Northward in 127 minutes consumed 127 IM San Luis Obispo <-> San Simeon is 42.5 miles Northward consumed 53 IM San Simeon <-> McWay Cove is 52.3 miles Northward consumed 61 IM Soquel (Hwy 1, Porter St Exit) <-> Summit Store via San Jose-Soquel Rd is 11.75 miles (1600' elevation difference) Northward (uphill) in 23 mins (~35mph) consumed 20IM For flat freeway at 62MPH, a good rule of thumb is you need at least 1.2X the real miles in Ideal Miles.