Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Using the heat when it's cold... mpg drain?

PaleMelanesian · 10-14-2009, 11:35 AM

With a full grille block on a hot summer day, just moving the temperature control dial to Hot will measurably drop the coolant temperature. This is with the fan turned OFF. Based on that, I conclude that it cools the engine even with no fan blowing, so I leave it on Cold until it's fully warmed up.

With a 10 mile commute, a tiny aluminum engine, and heavy use of EOC, that's pretty much never. I practice dwg (driving with gloves).

10-14-2009, 11:35 AM	#3 (permalink)
PaleMelanesian Master EcoModder Join Date: Dec 2007 Location: Texas Posts: 1,402 PaleCivic - '96 Civic DX Sedan Team Honda 90 day: 72.37 mpg (US) Thanks: 123 Thanked 123 Times in 87 Posts	With a full grille block on a hot summer day, just moving the temperature control dial to Hot will measurably drop the coolant temperature. This is with the fan turned OFF. Based on that, I conclude that it cools the engine even with no fan blowing, so I leave it on Cold until it's fully warmed up. With a 10 mile commute, a tiny aluminum engine, and heavy use of EOC, that's pretty much never. I practice dwg (driving with gloves). __________________ - - - - -Best 11-mile commute: 105 mpg - - - - -Best tank: 88.5 mpg / 1133 miles