Fuel Saving Tips
Warming cars via idling is not recommended by any manufacturer; wastes fuel; unnecessarily pollutes; can cause excessive engine wear, especially diesels. Just start; wait ten seconds; and then go easy until normal coolant operating temperature. This method lets all the vehicle systems warm up together. In extreme cold, one may need to warm the engine in order to keep the windshield clear, but most times, its best just to bundle up; scrape off the windshield; start; and go.
posted by gregsfc on November 19, 2017
this tip works for 80% of voting Fuelly members.