Fuel Saving Tips
This especially helps in the winter when the sun comes up, it'll almost always melt the frost on your windshield so you won't have to scrape it. The heat will also warm up your engine bay a bit so it will aid in your fuel economy slightly by creating a warmer engine before you start it.
posted by buyingconstant7 on December 22, 2015
this tip works for 57% of voting Fuelly members.