I have 2 questions about the DTE (distance to empty) gauge which estimates "max dist achievable with remaining fuel" 1) What does it mean? distance until engine conks out, gauge goes to 0 DTE, or single bar on gas gauge starts flashing? 2) How accurate is it? When I last filled up (9.41 gal; 4th tank), it read 556 miles based on the last tank average of 55.5 mpg. Now, I've driven 355 mi and the gauge reads 160 mi DTE. That adds up to 515 mi. Where did the other 40 miles go? My ave mpg has stayed within 0.2 mpg of 55.5 during the whole tank. I am ecstatic to be getting around 500 miles/tank - don't get me wrong - just don't understand the variation considering the constant mpg I'm getting. Anyone have any ideas?