Fuel Saving Tips
By backing in (or pulling through to park nose-out, in lots that have two spots nose-to-tail), you do your reversing when the transmission is warm, eliminating having to drive in Reverse with a cold transmission and engine. You'll eliminate the loud "clunk" (which is hard on the transmission) and also only go through a single acceleration cycle on a cold engine when departing your destination. It's also safer, since you will see the surrounding area immediately before backing in, instead of seeing the area, getting into and starting your car, and then backing out.
posted by F14Scott on September 14, 2014
this tip works for 85% of voting Fuelly members.